“aria-haspopup” ARIA Label for Accessibility

The aria-haspopup is an attribute that is set to point out the availability and the type of functional popup element that triggers the element. The purpose of the aria-haspopup is to assist the user with the assistive technology that there’s a message or dialogue that could have necessary information it may need response or interactions. … Read more

Aria Labels for Accessibility: Examples, Types, Uses, and Definitions

Aria Labels

The aria labels are properties roles and states that are added to the HTML structure to set the elements and provide information from a web content that is accessible for persons with disabilities. Assistive technology is an application capable of providing assistance driven by semantic HTML and aria labels. The WAI-ARIA specification attributes extend the … Read more

“aria-readonly” ARIA Label for Accessibility

aria-readonly

The aria-readonly attribute determines elements that are in a read-only state, especially with interactive elements that are not editable. The purpose of the aria-readonly is to provide information for the user that an interactive element cannot be modified. The developer can use the aria-readonly attribute for list elements that are read-only, to let the user … Read more

“aria-valuemax” ARIA Label for Accessibility

aria-valuemax

The aria-valuemax is a type of attribute or property that identifies the element’s maximum value in the range. The aria-valuemax purpose is to identify the elements with widget roles such as meter, scrollbar, slider, and spinbutton its maximum value. The developer can use the aria-valuemax to let the user know that there are limited values … Read more

“aria-rowindextext” ARIA Label for Accessibility

aria-rowindextext

The aria-rowindextext is an attribute that provides a human-understandable text to users regarding its position on the table element. The purpose of the aria-rowindextext is to communicate to the user through assistive technology if the information or position of the raw is not present or larger than the available row span. The developer can use … Read more

“aria-rowindex” ARIA Label for Accessibility

aria-rowindex

The aria-rowindex is a property that sets an element to provide a row position that is relevant to the user experience and ease of navigation to tables, grids, or treegrid. The purpose of aria-rowindex is to give location or position from the focused element, the position value may vary through the user’s keyboard navigation. The … Read more

“aria-relevant” ARIA Label for Accessibility

aria-relevant

The aria-relevant is a non-obligatory attribute that identifies the changes in the live regions, it is not required by the assistive technology’s screen reader to provide information about the updates. The aria-relevant value is acquired from the closest ascendant that has a definite value. The purpose of aria-relevant is to acquire value that can be … Read more

“aria-owns” ARIA Label for Accessibility

aria-owns

The aria-owns property identifies an element that specifies a relative connection between parents and child elements, it is possible if DOM or document object model cannot be used to present a visual relationship. The purpose of the aria-owns is to define parent and child elements with the other elements to determine its relationship. The developer … Read more

“aria-orientation” ARIA Label for Accessibility

aria-orientation

The aria-orientation is a property that determines whether the element’s position is horizontal or vertical. One of the functions of aria-orientation is to specify whether the element’s orientation is unknown. The responses of the arrows to the right, left, up, and down are affected by the orientation of the widget. The primary role of the … Read more

“aria-live” ARIA Label for Accessibility

aria-live

The aria-live attribute is an element that identifies an element worldwide that is to be updated with categorizations of update levels for user agents. The updated information is then transmitted to the user and any assistive technologies that are being used. The aria-live mission is to offer real-time information to users, with the expectation that … Read more

“aria-level” ARIA Label for Accessibility

aria-level

The aria-level attribute focuses on the hierarchical level of the elements that are under the same structure, it is defined. The purpose of aria-level is to define the levels if the parents’ child relationships are too simple. The developer can use the aria-level attribute if the DOM is unable to represent the level of an … Read more

“aria-labelledby” ARIA Label for Accessibility

aria-labelledby

The aria-labelledby is an attribute that provides an accessible name for the elements that are identified.  When the native elements do not contain enough properties to describe or label them, aria-labelledby is supposed to be used to set a name that is available to everyone. The aria-labelledby attribute provides a description of the element that … Read more

“aria-hidden” ARIA Label for Accessibility

aria-hidden

The aria-hidden is an attribute that describes an elements’ visibility on the assistive technology, the role of element is to be hidden unless expose by an instance. The benefit of aria-hidden is to avoid redundant object that the screen reader receives. It can prevent not important objects to be interpreted differently like images and icons. … Read more

“aria-grabbed” ARIA Label for Accessibility

aria-grabbed

The aria-grabbed element is considered to be draggable and usable in drag-and-drop operations. The aria-grabbed attribute defines the state of the element when it has been grabbed. The function of the aria-grabbed attribute is to signal to the user that the object or elements that have been selected are grabbable or draggable and can be … Read more

“aria-flowto” ARIA Label for Accessibility

aria-flowto

The aria-flowto is an attribute responsible for selecting the following element or entity in a reading content order randomly. This makes it easier for the user to override the default setting of the assistive technology, it is to read the document in order of how it was written. If the readers’ perception of the order … Read more

“aria-expanded” ARIA Label for Accessibility

aria-expanded

The aria-expanded is an attribute that sets on an element to indicate if control is expanded or collapsed, and whether list elements are displayed or not. The purpose of the aria-expanded attribute is to focus on the interactive control that toggles the visibility of the object. The developer can use the aria-expanded attribute to indicate … Read more

“aria-dropeffect” ARIA Label for Accessibility

aria-dropeffect

The aria-dropeffect is a drag-and-drop command by ARIA that imposes draggable sections with their corresponding drop targets. The purpose of the attribute is to define available drag options for users before it is released to a specific drop target using assistive technology to perform such commands. Such assistive technology is made available for users in … Read more

“aria-disabled” ARIA Label for Accessibility

aria-disabled

The aria-disabled indicates a state for an interactive element that can be inaccessible or accessible in precedence if required actions are met. The purpose of aria-disabled is to provide information to the user that an instance cannot proceed due to some required toggles in need of interactions or blanks to be filled in information. The … Read more

“aria-details” ARIA Label for Accessibility

aria-details

The aria-details attribute is used to notify the end-user that the element being viewed has more information for a specific object being selected.  The purpose of aria-details is to provide additional content through an assistive technology resource to display it through the current page or a designated external page. The developer can use the aria-details … Read more

“aria-description” ARIA Label for Accessibility

aria-description

The aria-description determines a string value describing the ongoing element. The intention for the aria-description is to create a mechanism that details the current element, providing assistive technologies with a greater context. The developers can use aria-description to generate a descriptive text that can be associated with the object via ID reference only if there … Read more

“aria-describedby” ARIA Label for Accessibility

aria-describedby

The aria-describedby recognizes the elements that mark out another element on which attribute sets, it lists the IDs of the elements that describe the object. The purpose of aria-describedby is to establish a link connecting widgets or groups and the text that is describing them. The aria-describedby isn’t limited to form controls, It can be … Read more

“aria-current” ARIA Label for Accessibility

aria-current

The aria-current is a non-null state on an element that identifies that the particular element constitutes the present item within a section or its related elements. The aria-current sends a signal and informs the assistive technologies of the user input through a method of styling. The aria-current should be set on a link within a … Read more

“aria-controls” ARIA Label for Accessibility

aria-controls

The aria-controls is one of the ARIA Label Accessibility attributes that specifies the details of its element/s and its presence. They are controlled by the element on which their corresponding attribute is coordinated. The aria-controls purposefully command and specifically identifies the elements it controls from the widget interface. This can be a useful attribute to … Read more

“aria-colspan” ARIA Label for Accessibility

aria-colspan

The aria-colspan specifies each column covered by a cell in a table. The aria-colspan is designated for gridcells that aren’t incorporated in a native HTML <table>. The aria-colspan value identifies the number of columns in each individual cell in an ARIA table. This attribute can be utilised  in elements like <table>, <th>, and <td>. The … Read more

“aria-colindextext” ARIA Label for Accessibility

aria-colindextext

The aria-colindextext attribute indicates a human-readable text alternative to the numeric aria-colindex. The purpose of the aria-colindextext is to provide or calculate an alternative of aria-colindex which is readable by a human. The developer can use aria-colindextext if the provided or calculated value of the aria-colindex is not relevant or does not indicate the displayed … Read more

“aria-colindex” ARIA Label for Accessibility

aria-colindex

The aria-colindex attribute indicates an element’s column index or position with regard to the number of columns within the table or treegrid. The purpose of the aria-colindex is to define the substructure, an element’s column index, or position according to the number of columns. Some tables can be vast which would result in only a … Read more

“aria-checked” ARIA Label for Accessibility

aria-checked

The aria-checked command represents the actual “checked ” status of checkboxes, buttons, and other widgets. The intention of the aria-checked is to identify if the element is checked “true”, unchecked “false”, or if the correct status is indeterminate “mixed”, implying that it is neither checked nor unchecked. Developers can use aria-checked by enabling focus with … Read more

“aria-busy” ARIA Label for Accessibility

aria-busy

The aria-busy attribute recognizes the changes done with a particular element and sends the signal to assistive technology to notify the user when the updates are already done. The purpose of aria-busy is to inform screen readers that the material within the entity’s subtree is being modified and must not be made known. The aria-busy … Read more

“aria-brailleroledescription” ARIA Label for Accessibility

aria-brailleroledescription

The aria-brailleroledescription command identifies a human-readable, author-localized abbreviated specification for the part of the elements intended to be converted into Braille. The purpose of the attribute is to provide a specified description of a widget using Braille. Basically, the value of aria-brailleroledescription abbreviates the aria-roledescription attribute in order for it to be converted to braille. … Read more

“aria-braillelabel” ARIA Label for Accessibility

aria-braillelabel

The aria-braillelabel interprets a sequence of values that creates labels of the element. This is specified to be converted into Braille. The purpose of the aria-braillelabel is to recreate how assistive technologies express the accessibility of each name of an element in Braille. The attribute should only be utilized when there are differences between the … Read more

“aria-autocomplete” ARIA Label for Accessibility

aria-autocomplete

The aria-autocomplete attribute defines if the entering description or content results in the display of a number of predictions from the user’s meant value for a combobox, searchbox, or textbox and how these predictions are displayed. The goal of the attribute is to connect features that provide inline suggestions from user inputs. The ext for … Read more

“aria-atomic” ARIA Label for Accessibility

aria-atomic

The aria-atomic property is a WAI-rich web application attribute. The aria-atomic attribute is used in conjunction with the aria-live property when the webpage contains live regions. Additionally, when auto-updating content, such as a live chat widget, is included on a website, the content is frequently updated. In this circumstance, consumers need to know only the … Read more

“aria-activedescendant” ARIA Label for Accessibility

aria-activedescendant

The aria-activedescendant specifies the ongoing active element whenever the focus is on another widget, combobox, or textbox. The aria-activedescendant command manages assistive technologies to allow focus for interactive elements that include multiple focusable descendants like grids, menus, and toolbars. Developers can utilize the aria-activedescendant in composite widgets, wherein a container element is focusable, however, its … Read more

“HSTS MISSING FROM HTTPS SERVER” Error: How to Fix it?

Missing HSTS from Web Server

“Missing HSTS from HTTPS Server” or Missing HSTS Error and warning involves the missing HSTS response header and command from the response of the webserver. HSTS provides end-to-end secure web browsing and website session for web users. Missing HSTS is a concern for web security and user privacy. Websites use HTTP to HTTPS redirection to … Read more

Proxy-Authenticate HTTP RequestHeader: Syntax, Directive, Examples

Proxy-Authenticate HTTP Request Header provides credentials for auditing in order to support proxy server verification. The primary function of the Proxy-Authenticate header is to connect the files and folders to the server. The Header is used to keep the server safe from foreign Requests. The related HTTP Status Code for the HTTP Header is “407” … Read more

HTTP Authentication: Basic Authentication

HTTP Authentication (Basic Authentication Access) is to provide a secure connection between the user-agent and the webserver. HTTP Authentication requires the usage of specific HTTP Headers. Hypertext Transfer Protocol requires a username, password, user-agent for access to the webserver. A User-agent uses a web browser to authenticate via HTTP. To provide HTTP Authentication, the credentials … Read more

ECT HTTP Header: Syntax, Directive, Examples

The ECT HTTP Header Client hint request header field indicates the effective connection type: slow-2g, 2g, 3g, 4g. Based on the time between the browser requesting a page and the effective type of the connection, effective connection type (ECT) refers to the measured network performance, returning a cellular connection type, such as 3G, even if … Read more

Keep-Alive HTTP Header: Syntax, Directive, Examples

Keep-Alive HTTP Header

The Keep-Alive HTTP Header general-header allows the sender to specify how the connection should be used, such as setting a timeout and a maximum number of requests. If you want this header to have any effect, you must set the Connection header to Keep-Alive HTTP Header. The Connection general header determines whether or not the … Read more

Server-Timing HTTP Header: Syntax, Directive, Examples

Server-Timing HTTP Header

The Server-Timing HTTP Header expresses one or more metrics and descriptions for a specific request-response cycle. It is used to display any backend server timing metrics (for example, database read/write, CPU time, file system access, and so on) in the developer tools in the user’s browser or in the PerformanceServerTiming interface. The PerformanceServerTiming interface displays … Read more

Server HTTP Header: Syntax, Directive, Examples

Server HTTP Header

The Server HTTP Header is a type of response header that contains information about the software that the server is using to process all requests. The Server HTTP Header contains only a few characteristics about the server, such as the server name and the software used to manage the server, such as sffe or cloudflare. … Read more

Referer HTTP Header: Syntax, Directive, Examples

Referer HTTP Header

The Referer HTTP Header is a request-type header that indicates the previous web page’s address and how it relates to the current web page or resource being accessed. The use of this header raises the risk of a website’s privacy and security being compromised, but it does allow websites and web servers to determine where … Read more

Pragma HTTP Header: Syntax, Directive, Examples

Pragma HTTP Header

The Pragma HTTP Header HTTP/1.0 general-header is an implementation-specific header that can have a number of different impacts along the request-response chain. This header ensures compatibility with HTTP/1.0 caches that lack a Cache-Control HTTP/1.1 header. The Cache-Control HTTP header field contains directives (instructions) that control caching in browsers and shared caches in both requests and … Read more

Sec-CH-UA HTTP Header: Syntax, Directive, Examples

Sec-CH-UA HTTP Header

In the Sec-CH-UA HTTP Header user agent client hint request header, the user-branding agent’s and significant version information are included. In a comma-separated list, the Sec-CH-UA header indicates the brand and significant version for each of the browser’s linked brands. Sec-CH-UA is a suggestion with low entropy. In most cases, it is delivered by default … Read more

Sec-Fetch-Site HTTP Header: Syntax, Directive, Examples

Sec-Fetch-Site HTTP Header

The Sec-Fetch-Site fetch metadata request header specifies the relationship between the origin of the request initiator and the requested resource’s origin. In other words, this header indicates to a server if a request for a resource originates from the same origin, the same site, a different site, or is “user-initiated.” The server can then use … Read more

NEL HTTP Header: Syntax, Directive, Examples

NEL HTTP Header

The NEL HTTP Header is also a JSON-formatted array of objects that refers to the previously mentioned Report-To header’s reporting endpoint. The NEL HTTP Header is a Report-To header extension that instructs the user agent to send network error reports. As a result, configuring a NEL header without a Report-To header is impossible. The NEL … Read more

Sec-Fetch-User : Syntax, Directive, Examples

Sec-Fetch-User HTTP Header

The Sec-Fetch-User fetch metadata request header is only sent when a user is activated. The value of this header will always be “?1.” A fetch metadata request header is an HTTP request header that gives more information about where the request came from. When the server sees where the request came from and what it … Read more

Sec-CH-UA-Mobile HTTP Header: Syntax, Directive, Examples

Sec-CH-UA-Mobile HTTP Header

The Sec-CH-UA-Mobile user agent client hint header in the request specifies whether the browser is running on a mobile device. Additionally, a desktop browser can use it to signal a preference for a “mobile” user experience. Sec-CH-UA-Mobile HTTP Header is a low-entropy hint. Low entropy suggestions include little information that may be used to “fingerprint” … Read more

Sec-CH-UA-Full-Version HTTP Header: Syntax, Directive, Examples

Sec-CH-UA-Full-Version HTTP Header

The Sec-CH-UA-Full-Version HTTP Header user agent client hint request header contains the full version string of the user agent. There is only one value for using the Sec-CH-UA-Full-Version HTTP Header. The value for using the Sec-CH-UA-Full-Version HTTP Header is the version. An example of the Sec-CH-UA-Full-Version HTTP Header is written below.  The Sec-CH-UA-Full-Version HTTP Header … Read more

Sec-CH-UA-Full-Version-List HTTP Header: Syntax, Directive, Examples

Sec-CH-UA-Full-Version-List

The Sec-CH-UA-Full-Version-List HTTP Header user agent client hint request header contains information about the user agent’s branding as well as its full version number. Each brand linked with the browser is listed in a comma-separated list in the Sec-CH-UA-Full-Version-List HTTP Header, which contains the brand and full version information for each brand. The Sec-CH-UA-Full-Version-List HTTP … Read more

Sec-Fetch-Mode HTTP Header: Syntax, Directive, Examples

Sec-Fetch-Mode HTTP Header

The Sec-Fetch-Mode HTTP Header fetches metadata request header specifies the request mode. In general, this enables a server to differentiate between requests originating from a user moving between HTML pages and requests to load graphics and other resources. For example, navigate is used for top-level navigation requests, while no-cors is used to load an image. … Read more

Sec-CH-UA-Bitness HTTP Header: Syntax, Directive, Examples

Sec-CH-UA-Bitness

The Sec-CH-UA-Bitness HTTP Header specifies the “bitness” of the user agent’s underlying CPU architecture in the Sec-CH-UA-Bitness user agent client hint request header. The size of an integer or memory address in bits—typically 64 or 32 bits. There is only one value for using the Sec-CH-UA-Bitness HTTP Header. The value using the Sec-CH-UA-Bitness HTTP Header … Read more

X-Forwarded-Host HTTP Header: Syntax, Directive, Examples

X-Forwarded-Host HTTP Header

The X-Forwarded-Host HTTP Header is a de facto standard request-type header. This header is used to identify the client’s initial request. Because the host names and ports of reverse proxies differed at that time, this header took the initiative and identified the originating request. Additionally, this header can be utilized for debugging and the creation … Read more

Sec-CH-UA-Platform-Version HTTP Header: Syntax, Directive, Examples

Sec-CH-UA-Platform-Version HTTP Header

The Sec-CH-UA-Platform-Version HTTP Header is a header in the Sec-CH-UA-Client-Hint request that tells the client what operating system version the client is running. There is only one value for using the Sec-CH-UA-Platform-Version HTTP Header. The value using the Sec-CH-UA-Platform-Version HTTP Header is the version. The version string usually contains the operating system version in the … Read more

X-Forwarded-Proto HTTP Header: Syntax, Directive, Examples

X-Forwarded-Proto HTTP Header

The X-Forwarded-Proto HTTP header is a de-facto standard for identifying a client’s connection protocol (HTTP or HTTPS). From your server access logs, it is not clear which protocol is being utilized between the server and the load balancer. The X-Forwarded-Proto HTTP Header request header can be used to determine the client-load balancer protocol. The X-Forwarded-Proto … Read more

RTT HTTP Header: Syntax, Directive, Examples

RTT HTTP Header

In milliseconds, the RTT HTTP Header Client hint request header field tells you how long it will take for the application layer to get back to you. The RTT HTTP Header hint, unlike the transport layer RTT HTTP Header, includes the time it takes for the server to process. The RTT HTTP Header value is … Read more

Warning HTTP Header: Syntax, Directive, Examples

Warning HTTP Header

The Warning HTTP header offers information about potential issues with the message’s status. A response may have multiple Warning headers. The Warning HTTP header contains information about potential problems with the message’s status that may not be reflected in the message. The Warning HTTP Header has multiple values. The warn-code includes a warn-agent, a warn-text, … Read more

X-DNS-Prefetch-Control HTTP Header: Syntax, Directive, Examples

X-DNS-Prefetch-Control HTTP Header

The X-DNS-Prefetch-Control HTTP Header response type header indicates to the browser whether or not to perform DNS prefetching. Turning it on may not work in all scenarios, as not all browsers support it. Disabling it should result in its removal from all supported browsers. The majority of browsers will disregard this header because they do … Read more

Link HTTP Header: Syntax, Directive, Examples

Link HTTP Header

The Link HTTP Header entity-header field allows one or more links to be serialized in HTTP headers. It has the same semantics as the HTML link> element. The HTML element link> specifies relationships between the current document and an external resource. This element is most commonly used to link to stylesheets, but it is also … Read more

Forwarded HTTP Header: Syntax, Directive, Examples

Forwarded HTTP Header

The Forwarded HTTP Header request header contains information that reverse proxy servers may add that would otherwise be altered or lost during the request’s path through proxy servers. While accessing the Internet’s many networks, proxy servers and HTTP tunnels facilitate access to World Wide Web information. A proxy server can be located on the user’s … Read more

ECT HTTP Header: Syntax, Directive, Examples

ECT HTTP Header

The ECT HTTP Header Client hint request header field indicates the effective connection type: slow-2g, 2g, 3g, 4g. Based on the time between the browser requesting a page and the effective type of the connection, effective connection type (ECT) refers to the measured network performance, returning a cellular connection type, such as 3G, even if … Read more

User-Agent HTTP Header: Syntax, Directive, Examples

User-Agent HTTP Header

The User-Agent HTTP Header is a request header that contains a string identifying the operating system and browser used by the webserver. The User-Agent HTTP Header contains the User-Agent string. The User-Agent request header is a unique string that enables servers and network peers to identify the requesting user agent’s application, operating system, vendor, and/or … Read more

Early-Data HTTP Header: Syntax, Directive, Examples

Early-Data HTTP Header

The Early-Data HTTP Header is set by an intermediate to indicate that the request was sent using TLS early data. TLS 1.3 is a significant update to TLS. TLS 1.3 introduces a number of enhancements aimed at enhancing security and performance. Additionally, the Early-Data HTTP Header specifies that the intermediary understands the status code 425 … Read more

Viewport-Width HTTP Header: Syntax, Directive, Examples

Viewport-Width HTTP Header

The Viewport-Width HTTP Header device client hint request header specifies the width of the client’s layout viewport in CSS pixels in the request header. To use the Viewport-Width HTTP Header, the developer must use similar HTTP Headers to Viewport-Width HTTP Header, which is the client hint request. A “Client Hint Request” is a set of … Read more

Transfer-Encoding HTTP Header: Syntax, Directive, Examples

Transfer-Encoding HTTP Header

The Transfer-Encoding HTTP header is a response-type header that acts as a hop-by-hop header; the hop-by-hop header connection is the unique transport-level connection that must not be re-transmitted. This header is used to communicate between two nodes (single transport-level connection). If there is a multi-node connection, then additional Transfer-Encoding settings must be used. There is … Read more

Trailer HTTP Header: Syntax, Directive, Examples

Trailer HTTP Header

The Trailer HTTP Header is a response header that indicates the presence of a specified set of header fields in the trailer of a message encoded using chunked transfer-coding. It enables senders to put additional fields at the end of chunked messages to deliver metadata. The chunked transfer encoding is a data transport technique included … Read more

Set-Cookie2 HTTP Header: Syntax, Directive, Examples

Set-Cookie2 HTTP Header

The Set-Cookie2 HTTP Header is a response-type header that has been obsolete. The Set-Cookie2 HTTP Header provides a means for the client and server to exchange state information. This command is typically replaced by the Set-Cookie HTTP command rather than the Set-Cookie2 HTTP Header. Set-Cookie HTTP is an HTTP response header that is used to … Read more

Sec-WebSocket-Accept HTTP Header: Syntax, Directive, Examples

Sec-WebSocket-Accept HTTP headers

The Sec-Websocket-Accept HTTP headers are used to send additional information between the client and the server with an HTTP request or response. They are subdivided into general headers, request headers, response headers, and entity headers. The Sec-WebSocket-Accept HTTP Header is part of the response-type headers group. It is used by the server to let the … Read more

DPR HTTP Header: Syntax, Directive, Examples

DPR HTTP Header

The DPR HTTP Header device client hint request header contains the pixel ratio of the client device. This ratio indicates the number of physical device pixels required to represent each CSS pixel. The word “CSS pixel” refers to the CSS unit of absolute length px, which is specified normatively as exactly 1/96th of an inch. … Read more

Digest HTTP Header: Syntax, Directive, Examples

Digest HTTP Header

The Digest HTTP Header contains a digest of the requested resource’s selected representation. Representations are various forms of a specific resource that may be returned in response to a request: for example, the same resource may be formatted in a specific media type such as XML or JSON, localized to a specific written language or … Read more

Sec-CH-UA-Model HTTP Header: Syntax, Directive, Examples

Sec-CH-UA-Model HTTP Header

The Sec-CH-UA-Model HTTP Header user agent client hint request header identifies the browser’s operating system and device model. There is only one value for using the Sec-CH-UA-Model HTTP Header. The value for using the Sec-CH-UA-Model HTTP Header is the device-version. The device-version is a string with the device’s model number. “Pixel 3” is a good … Read more

Downlink HTTP Header: Syntax, Directive, Examples

Downlink HTTP Header

The Downlink HTTP Header Client hint request-header field contains the approximate bandwidth of the client’s connection to the server, expressed in megabits per second. To avoid fingerprinting, the Downlink HTTP Header value is specified in Mbps and rounded to the nearest 25 kilobits per second. Numerous more techniques exist for an attacker to gain similar … Read more

Location HTTP Header: Syntax, Directive, Examples

Location HTTP Header

The Location HTTP Header interface represents the URL of the object to which it is linked. Changes made to it are reflected in the object to which it is related. The Document and Window interfaces both have such a linked Location, which can be accessed via Document.location and Window.location, respectively. The Document interface represents any … Read more

Public-Key-Pins-Report-Only: Syntax, Directive, Examples

Public-Key-Pins-Report-Only-HTTP Header

The Public-Key-Pins-Report-Only is an HTTP Response Header created for pinning violations. The HTTP Public-Key-Pins-Report-Only response header sends a report to the report-URI (Uniform Resource Identifier) for pinning violations. Pinning is a method that permits you to define a cryptographic identity. Pinning provides security improvement for a website that depends on SSL Certificates. SSL (Secure Sockets … Read more

Allow HTTP Header: Syntax, Directive, Examples

Allow HTTP Header

The Allow HTTP Header is a type of Entity header that specifies the valid methods that a resource supports. It is used in response to a 405 Method is not a permitted error. If this header value is missing, it indicates that the resource does not support any request methods. The HyperText Transfer Protocol (HTTP) … Read more

Age HTTP Header: Syntax, Directive, Examples

Age HTTP Header

The Age HTTP Header specifies the amount of time in seconds that an object was cached by a proxy. Typically, the Age HTTP Header value is close to zero. If Age: 0 is specified, it was most likely retrieved from the origin server; if not, it was often calculated as the difference between the proxy’s … Read more

SourceMap HTTP Header: Syntax, Directive, Examples

SourceMap HTTP Header

The SourceMap HTTP Header response header links generated code to a source map, enabling the browser to reconstruct the original source and present the reconstructed original in the debugger. There is only one value for using the SourceMap HTTP Header. The value using the SourceMap HTTP Header is the URL. An example of the SourceMap … Read more

Access-Control-Allow-Credentials HTTP Header: Syntax, Directive, Examples

Access-Control-Allow-Credentials HTTP Header

The Access-Control-Allow-Credentials is an HTTP response header that notifies the web browser to display the response when the Request’s credentials mode is “include”. Request’s credentials is a read-only property that contains the credentials of the request. Credentials can be in a form of cookies, authorization headers, or client certificates. The “include” command refers to the … Read more

TK HTTP Header: Syntax, Directive, Examples

TK HTTP Header

The TK is an HTTP response header that determines the tracking status of the equivalent request. The Tk-HTTP response header is defined to communicate the web server’s tracking performance. Tracking is the compilation of data concerning a specific user’s activity across multiple distinct contexts, or the sharing of information obtained from the user’s activity outside … Read more

Access-Control-Max-Age: Syntax, Directive, Examples

Access-Control-Max-Age HTTP Header

The Access-Control-Max-Age is an HTTP Response Header that determines the length of time the results of a preflight request can be cached. The results of a preflight request are the information included in the Access-Control-Allow-Methods and Access-Control-Allow-Headers HTTP response headers. By default, the number of seconds the results of a preflight request can be cached … Read more

Access-Control-Expose-Headers: Syntax, Directive, Examples

Access-Control-Expose-Headers HTTP Header

Access-Control-Expose-Headers is an HTTP response header that determines which headers are to be exposed to the client scripts on a web browser, as a part of a response to a CORS (Cross-Origin Resource Sharing) request. CORS (Cross-Origin Resource Sharing) is an HTTP-header-based mechanism that allows verified access to other resources located outside the domain. The … Read more

Access-Control-Allow-Origin HTTP Header: Syntax, Directive, Examples

Access-Control-Allow-Origin HTTP Header

The Access-Control-Allow-Origin is a HyperText Transfer Protocol (HTTP) Response Header that determines if the response is allowed to be shared with the requesting code from a specified origin. The Access-Control-Allow-Origin HTTP response header notifies the web browser if the response can be shared by returning the value of the `Origin` request header, which can either … Read more

Accept-CH HTTP Header: Principles, Types, Working Examples

Accept-CH HTTP Header

The Accept-CH is an HTTP response header used by the webserver to request other information from web browsers regarding the client’s device, network, and user agent preferences. The Accept-CH HTTP header allows web servers to customize the content they serve by optimizing images and other content for mobile devices or users on low-bandwidth connections. The … Read more

Accept-Encoding HTTP Header: Principles, Types, Working Examples

Accept-Encoding HTTP Header

The Accept-Encoding HTTP request header determines the content compression algorithm that will be accepted. Accept-Encoding HTTP Header is related to Content-Encoding. When data are compressed in Content-Encoding, the Accept HTTP header will inform the browser whether a client can manage the compressed algorithm of the website. Content-Encoding is used for data compression, where representation’s data … Read more

Accept-Language HTTP Header: Principles, Types, Working Examples

Accept-Language HTTP Header

Accept-Language is a type of HTTP Request header that determines the client’s preferred language, either the local or the natural language. The Accept-Language HTTP Request header can include multiple languages. Accept-Language HTTP request header values can be separated with a comma. The search engine determines the appropriate values for the Accept-Language HTTP Request header based … Read more

Access-Control-Allow-Methods: Syntax, Directive, Examples

Access-Control-Allow-Methods HTTP Header

The Access-Control-Allow-Methods is an HTTP response header that determines the acceptable methods to connect to a specific resource in response to the given preflight request. A preflight request allows a web server to check how the actual request will appear before being created. The web server will recommend a web browser if the actual request … Read more

Access-Control-Allow-Headers: Syntax, Directive, Examples

Access-Control-Allow-Headers HTTP Header

The Access-Control-Allow-Headers is an HTTP response header that specifies which HTTP headers are supported by the response’s URL for the CORS (Cross-Origin Resource Sharing) protocol. A Cross-Origin Resource Sharing (CORS) is an HTTP-header-based method that enables a web server to determine any other origin or domain than its own from which a web browser allows … Read more

Authorization HTTP Header: Syntax, Directive, Examples

Authorization HTTP Header

Authorization HTTP Request Header is an HTTP header for authorization of access to a web server. HTTP Authorization is used for securing resources within a web server. The Authorization HTTP Header is used with WWW-Authenticate HTTP Header. If there is a protected resource with HTTP WWW-Authenticate, the webserver will give the 401 HTTP Status Code. … Read more

X-Content-Type-Options HTTP Header: Syntax, Directive, Examples

X-Content-Type-Options HTTP Header

The X-Content-Type-Options HTTP Header response HTTP header is a server-side marker that indicates that the MIME types advertised in the Content-Type headers should be followed and not changed. A media type, also known as a Multipurpose Internet Mail Extensions or MIME type, specifies the nature and format of a document, file, or byte arrangement. The … Read more

DNT HTTP Header: Syntax, Directive, Examples

DNT HTTP Header

The DNT HTTP Header request header indicates the user’s preference for tracking. It allows users to choose whether they prefer privacy or personalized content. The DNT HTTP Header has been deprecated because it is no longer recommended. Though some browsers may still support it, it may have already been removed from the relevant web standards, … Read more

Date HTTP Header: Syntax, Directives, Examples

Date HTTP Header

HTTP headers are used to send extra information with an HTTP response or request. The Date HTTP header contains the message’s creation date and time. It is supported by every browser. There are multiple values using the Date HTTP Header. The values using the Date HTTP Header are day name, day, month, year, hour, minute, … Read more

Content Negotiation: Principles, Types, Working Examples

Content-Negotiation

Content Negotiation is the method used by a client to request a specific Representation that fits the user requirements. The most suitable Representation for the user agent is selected from various presentations from the REST (Representational State Transfer) resources. The advantage of Content Negotiation is that it allows the technology to be released from the … Read more

Connection HTTP Header: Syntax, Directive, Examples

Connection HTTP Header

The Connection HTTP Header general-header specifies whether or not the network connection should be maintained after the current transaction is complete. If keep-alive is specified, the connection is persistent and is not closed, allowing for subsequent requests to the same server.HTTP/2 prohibits the use of connection-specific header fields such as Connection and Keep-Alive. While Chrome … Read more

Clear-Site-Data HTTP Header: Syntax, Directive, Examples

Clear-Site-Data HTTP Header

The Clear-Site-Data HTTP Header is a type of response header. The Clear-Site-Data HTTP Header is used to remove browsing data from the requesting website. Cache, cookies, and storage are all types of browsing data. It enables web developers to have greater control over data stored locally by the browser. The Cache interface provides permanent storage … Read more

X-Frame-Options HTTP Header: Syntax, Directive, Examples

X-Frame-Options HTTP Header

The X-Frame-Options HTTP response header can be used to indicate whether a browser should be permitted to render a page within a <frame>, an <iframe>, an <embed>, or an <object>. Websites can utilize this to protect themselves from click-jacking attacks by ensuring that their content is not integrated into other websites. The HTML element <frame> … Read more

Content-Type HTTP Header: Syntax, Directive, Examples

Content-Type HTTP Header

The Content-Type HTTP Header is used to display the asset’s first media type before any substance encoding is used for transmission. The mime type, which is now appropriately called “media type,” but sometimes is “content type,” is a string sent alongside a record demonstrating the type of the document depicting the substance design, for example, … Read more

Content-Encoding HTTP Header: Syntax, Directive, Examples

Content-Encoding HTTP Header

The Content-Encoding HTTP Header specifies which encoding was used to encode the representation and in what order. This instructs the recipient on how to decode the representation and acquire the payload’s original format. To reduce the size of a message. The Content-encoding HTTP Header is most commonly used to encode it. The Content-Type header specifies … Read more

Retry-After HTTP Header: Syntax, Directive, Examples

Retry-After HTTP Header

HTTP headers are used to include additional data in HTTP requests and responses. The Retry-After HTTP Header is an HTTP response header that specifies the amount of time to wait before making another request. The Retry-After HTTP Header response header has a variety of uses depending on the status code. The status code 503 indicates … Read more

Content-Language HTTP Header: Syntax, Directive, Examples

Content-Language HTTP Header

The Content-Language HTTP Header representation header is used to describe the language intended for the audience, allowing users to differentiate it based on their preferred language. Instead, use the lang attribute to specify the language in which the document is written. The lang global attribute defines an element’s language, either the language in which non-editable … Read more

If-Match HTTP Header: Syntax, Directive, Examples

If-Match HTTP Header

The If-Match HTTP Header conditionally sends the request. The server will return the requested resource only if it matches one of the listed ETags for the GET and HEAd methods. The HTTP GET method is used to obtain a representation of the requested resource. GET requests should be used exclusively to obtain data. The HTTP … Read more

Accept-CH-Lifetime HTTP Header: Syntax, Directive, Examples

Accept-CH-Lifetime HTTP Header

The Accept-CH-Lifetime HTTP header is set by the webserver to define the persistence of the Accept-CH HTTP header value. The Accept-CH HTTP response header specifies which HTTP Client Hints the client should include in subsequent requests. The Accept-CH HTTP response header is used by the webserver to request additional information from web browsers about the … Read more

500 HTTP Response Status Codes: Meaning, Methods – Successful Responses

500 HTTP Status Codes

The 500 HTTP Status Codes which means internal server error indicates that The server was unable to fulfill the request because of an unanticipated issue. In this case, the error message is a general “catch-all.” Typically, this implies that the server is unable to locate a more appropriate 5xx error code. Server administrators may choose … Read more

428 HTTP Response Status Code Definition: Example, Usage, Methods

428 HTTP Status Code

The 428 HTTP Status Code indicates that the request was preconditioned required. The 428 HTTP Status Code is one of the 4xx(Server Error) response codes that indicate the server anticipates conditionality in the request. The 428 HTTP Status Code indicates that the origin server requires a conditional request. The purpose of the 428 HTTP Status … Read more

301 HTTP Response Status Code Definition: Example, Usage, Methods

301 HTTP Status Code

The 301 HTTP Status Code response means that the resources have moved permanently. The 301 HTTP Status Code indicated resource has been definitively moved to the URL supplied by the Location headers. Software redirection to the new URL and search engines modify their links to the resource. Considering the possibility that the server has a … Read more

423 HTTP Response Status Code Definition: Example, Usage, Methods

423 HTTP Status Code

The 423 HTTP Status Code means that the resource that is being accessed is locked. In the 423 HTTP Status Code, The response should contain a suitable precondition or postcondition code, for example, ‘lock-token-submitted’ or ‘no-clashing lock’. The 423 HTTP Status Code is used in circumstances where the client could possibly resolve the contention and … Read more

412 HTTP Response Status Code Definition: Example, Usage, Methods

412 HTTP Status Code

The 412 HTTP Status Code means that the request is preconditioned failed. When one or more of the conditions specified in the request header fields were tested on the server, the precondition failed. The 412 HTTP Status Code enables the client to impose preconditions on the current resource state, representations, and metadata, preventing the request … Read more

416 HTTP Response Status Code Definition: Example, Usage, Methods

416 HTTP Status Code

The 416 HTTP Status Code which means that range is not satisfiable indicates that the server is unable to provide the requested ranges. Either the page does not include any such ranges, or the Range header value is nonsensical despite its proper syntactic usage. The 416 response message includes a Content-Range indicating an unfulfilled range … Read more

415 HTTP Response Status Code Definition: Example, Usage, Methods

415 HTTP Status Code

The 415 HTTP Status Code means that the request is unsupported media type indicates that the server rejects the request due to the payload format being unsupported. The format problem could be caused by the request’s specified Content-Type or Content-Encoding, or it could be the result of directly analyzing the data. The difference between HTTP … Read more

405 HTTP Response Status Code Definition: Example, Usage, Methods

405 HTTP Status Code

The 405 HTTP Status Code means that the method is not allowed. In the 405 HTTP Status Code, the Request-Line isn’t considered the resource distinguished by the Request-URI. The response should incorporate an Allow header containing a rundown of substantial strategies for the mentioned asset. There are three methods expressed to use the 405 HTTP … Read more

403 HTTP Response Status Code Definition: Example, Usage, Methods

403 HTTP Status Code

The 403 HTTP Status Code means that the request is forbidden indicates that the server understands the request but refuses to authorize it. This status is similar to 401, but for the 403 Forbidden Status Code re-authenticating makes no difference. The access is permanently forbidden and tied to the application logic, such as insufficient rights … Read more

200 HTTP Response Status Codes: Meaning, Methods – Successful Responses

200 HTTP Status Codes

The HTTP 200 OK success status response code represents a successful HTTP request. The 200 responses are cacheable by default. The GET, HEAD, PUT, POST, and TRACE request method determines the meaning of success 200 Status Code. An origin server generates a payload body of zero length. Aside from CONNECT responses, a 200 response always … Read more

429 HTTP Response Status Code Definition: Example, Usage, Methods

429 HTTP Status Code

The 429 HTTP Status Code indicates that the request was too many requests. This means that the user sent too many requests in a short period of time (“rate limiting”). The response representations include information about the condition as well as a Retry-After header indicating how long to wait before making another request. There is … Read more

506 HTTP Response Status Code Definition: Example, Usage, Methods

506 HTTP Status Code

The 506 HTTP Status Code means variant also negotiates. The 506 HTTP Status Code may be used in conjunction with Transparent Content Negotiation. When a server supports numerous variants of a resource, this protocol enables a client to retrieve the best variant. The Variant Also Negotiates status code indicates an internal server configuration problem in … Read more

406 HTTP Response Status Code Definition: Example, Usage, Methods

406 HTTP Status Code

The 406 HTTP Status Code means that it is not acceptable. In the 406 HTTP Status Code, the server can’t deliver a response matching the rundown of adequate values characterized in the request proactive content negotiation headers, and the server is reluctant to supply a default presentation. The 406 HTTP Status Code is seldom utilized. … Read more

401 HTTP Response Status Code Definition: Example, Usage, Methods

401 HTTP Status Code

The 401 HTTP Status Code means that the request is unauthorized which indicates that the client request was not completed because the client did not provide valid authentication credentials for the requested resource. This Status Code is accompanied by an HTTP WWW-Authenticate response header that specifies how the client can re-request the resource after prompting … Read more

308 HTTP Response Status Code Definition: Example, Usage, Methods

308 HTTP Status Code

The 308 HTTP Status Code means that the request is a permanent redirect. The 308 HTTP Status Code indicates that the target resource has a new permanent URI (Uniform Resource Identification) and that any future references to it should use one of the enclosed URIs. Clients with link editing capabilities ought to automatically re-link references … Read more