DOMImplementation.hasFeature() - Web APIs
the domimplementation.hasfeature() method returns a boolean flag indicating if a given feature is supported.
... specifications specification status comment domthe definition of 'domimplementation.hasfeature' in that specification.
... document object model (dom) level 3 core specificationthe definition of 'domimplementation.hasfeature' in that specification.
...And 2 more matches

DOMImplementation - Web APIs
domimplementation.hasfeature() returns a boolean indicating if a given feature is supported or not.

Index - Web APIs
715 domimplementation.hasfeature() api, dom, domimplementation, method, reference the domimplementation.hasfeature() method returns a boolean flag indicating if a given feature is supported.

requiredFeatures - SVG: Scalable Vector Graphics
to detect availability of an svg feature from script, there is the (also deprecated) domimplementation.hasfeature() method.