Currently, all my angular material HTML attributes are highlighted in yellow with WebStorm 9 (Mac OS X Yosemite) warning: \"Attribute [name] is not allowed here\".
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Currently I don't think that idea's AngularJS plugin understands angular-materials attribute extensions.
It does understand the directives i.e. control click
For now you will have to add the attributes af custom attributes in order to get a "green" page.