This Boolean attribute is set to indicate to a browser that the script is meant to be executed after the document has been parsed, but before firing DOMContentLoaded. See CORS settings attributes for a more descriptive explanation of its valid arguments. To allow error logging for sites which use a separate domain for static media, use this attribute.
Normal script elements pass minimal information to the window.onerror for scripts which do not pass the standard CORS checks. See Browser compatibility for notes on browser support. This is a boolean attribute: the presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value. This attribute allows the elimination of parser-blocking JavaScript where the browser would have to load and evaluate scripts before continuing to parse. asyncįor classic scripts, if the async attribute is present, then the classic script will be fetched in parallel to parsing and evaluated as soon as it is available.įor module scripts, if the async attribute is present then the scripts and all their dependencies will be executed in the defer queue, therefore they will get fetched in parallel to parsing and evaluated as soon as they are available. This element includes the global attributes.
From object to iframe - other embedding technologies.Assessment: Structuring a page of content.
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