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
DOMStringrepresenting the feature name. - version
-
Is a
DOMStringrepresenting 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
- The
DOMImplementationinterface it belongs to.