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DOMImplementation.hasFeature

The DOMImplementation.hasFeature() method returns a Boolean flag indicating if a given feature is supported.

The different implementation fairly diverged in what kind of features was reported. The latest version of the spec settled to force this method to always return true, except for SVG features, where the functionnality was accurate and in use.

Syntax

flag = document.implementation.hasFeature(feature, version);

Parameters

feature
Is a DOMString representing the feature name.
version
Is a DOMString representing the version of the specification defining the feature.

Specifications

Specification Status Comment
DOM
DOMImplementation.hasFeature
Living Standard Modified to always return true except for SVG features.
Document Object Model (DOM) Level 3 Core Specification
DOMImplementation.hasFeature
Recommendation No change from Document Object Model (DOM) Level 2 Core Specification
Document Object Model (DOM) Level 2 Core Specification
DOMImplementation.hasFeature
Recommendation No change from Document Object Model (DOM) Level 1 Specification
Document Object Model (DOM) Level 1 Specification
DOMImplementation.hasFeature
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) 1.0 (1.7 or earlier) (Yes) (Yes) (Yes)
Always true for non-SVG features. ? 19.0 (19.0) ? ? ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 1.0 (1.0) (Yes) (Yes) (Yes)
Always true for non-SVG features. ? 19.0 (19.0) ? ? ?

See also

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