DOMImplementation.hasFeature()

Deprecated
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Do not use it in old or new projects. Pages or Web apps using it may break at any time.

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

The different implementations fairly diverged in what kind of features were reported. The latest version of the spec settled to force this method to always return true, except for SVG features, where the functionality 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
The definition of 'DOMImplementation.hasFeature' in that specification.
Living Standard Modified to always return true except for SVG features.
Document Object Model (DOM) Level 3 Core Specification
The definition of 'DOMImplementation.hasFeature' in that specification.
Recommendation No change from Document Object Model (DOM) Level 2 Core Specification
Document Object Model (DOM) Level 2 Core Specification
The definition of 'DOMImplementation.hasFeature' in that specification.
Recommendation No change from Document Object Model (DOM) Level 1 Specification
Document Object Model (DOM) Level 1 Specification
The definition of 'DOMImplementation.hasFeature' in that specification.
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) ? ? ?
Always false 44.0        
Feature Android Android Webview Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support (Yes) (Yes) 1.0 (1.0) (Yes) (Yes) (Yes) (Yes)
Always true for non-SVG features. (Yes) ? 19.0 (19.0) ? ? ? Not supported
Always false Not supported 44.0         44.0

See also

Document Tags and Contributors

Last updated by: jpmedley,