web api instance property
HTMLMetaElement: scheme property
The HTMLMetaElement.scheme property defines the scheme of the value in the content attribute.
The scheme property was created to enable providing additional information to be used to interpret the value of the content property. The scheme property takes as its value a scheme format (i.e., YYYY-MM-DD) or scheme format name (i.e., ISBN), or a URI providing more information regarding the scheme format. The scheme defines the format of the value of the content attribute.
The scheme content is interpreted as an extension of the element’s name if a browser or user agent recognizes the scheme.
This property is deprecated and should not be used on new web pages.
Value
A string.
Examples
The following example queries a <meta> element that contains a name attribute with the value of identifier.
The scheme value is logged to the console to display the scheme of the metadata content:
// given <meta name="identifier" content="1580081754" scheme="ISBN">
const meta = document.querySelector("meta[name='identifier']");
console.log(meta.scheme);
// "ISBN"