The Access-Control-Allow-Headers header is sent by the server to let the client know which headers it supports for CORS requests. The value of Access-Control-Allow-Headers should be a comma-delineated list of header names, such as X-Custom-Information or any of the standard but non-basic header names (which are always allowed)....View this page on GitHub • Report a problem with this content...
The HTTP Permissions-Policy header local-fonts directive controls whether the current document is allowed to gather data on the user's locally-installed fonts via the Window.queryLocalFonts() method....View this page on GitHub • Report a problem with this content...
The HTTP Permissions-Policy header identity-credentials-get directive controls whether the current document is allowed to use the Federated Credential Management API (FedCM), and more specifically the navigator.credentials.get() method with an identity option....View this page on GitHub • Report a problem with this content...
Learn about the EcKeyImportParams interface, including its properties, code examples, specifications, and browser compatibility....View this page on GitHub • Report a problem with this content...
Learn about the CompositionEvent interface, including its constructor, properties, and methods, specifications and browser compatibility....View this page on GitHub • Report a problem with this content...
Learn about the AudioSinkInfo interface, including its properties, code examples, specifications, and browser compatibility....View this page on GitHub • Report a problem with this content...
Learn about the HashChangeEvent interface, including its constructor, properties, and methods, code examples, specifications, and browser compatibility....View this page on GitHub • Report a problem with this content...
A PRNG (pseudorandom number generator) is an algorithm that outputs numbers in a complex, seemingly unpredictable pattern. Truly random numbers (say, from a radioactive source) are utterly unpredictable, whereas all algorithms are predictable, and a PRNG returns the same numbers when passed the same starting parameters or seed....View this page on GitHub • Report a problem with this content...
Graceful degradation is a design philosophy that centers around trying to build a modern website/application that will work in the newest browsers, but falls back to an experience that while not as good still delivers essential content and functionality in older browsers....View this page on GitHub • Report a problem with this content...
A constructor belongs to a particular class object that is instantiated. The constructor initializes this object and can provide access to its private information. The concept of a constructor can be applied to most object-oriented programming languages. Essentially, a constructor in JavaScript is usually declared at the instance of a class....View this page on GitHub • Report a problem with this content...