The HTTP If-None-Match request header makes a request conditional.
The server returns the requested resource in GET and HEAD methods with a 200 status, only if it doesn't have an ETag matching the ones in the If-None-Match header.
For other methods, the request will be processed only if the eventually existing resource's ETag doesn't match any of the values listed....View this page on GitHub • Report a problem with this content...
The :host CSS pseudo-class selects the shadow host of the shadow DOM containing the CSS it is used inside — in other words, this allows you to select a custom element from inside its shadow DOM....View this page on GitHub • Report a problem with this content...
Learn about the TextFormatUpdateEvent interface, including its constructor and methods, code examples, specifications, and browser compatibility....View this page on GitHub • Report a problem with this content...
HTML-элемент устанавливает перевод строки в тексте (возврат каретки). Он полезен при написании поэмы или адреса, где важно деление на строки....View this page on GitHub • Report a problem with this content...
Learn about the Highlight interface, including its constructor, properties, and methods, code examples, specifications, and browser compatibility....View this page on GitHub • Report a problem with this content...