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Further cleanup of isEventSupported

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This commit is contained in:
Andreas Svensson
2014-01-02 15:36:38 +01:00
parent e91a8a1bc3
commit 7264cbcdfb
1 changed files with 8 additions and 7 deletions
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src/dom/isEventSupported.js
+8 -7
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@@ -20,13 +20,13 @@
var ExecutionEnvironment = require('ExecutionEnvironment');
var testNode, useHasFeature;
var useHasFeature;
if (ExecutionEnvironment.canUseDOM) {
testNode = document.createElement('div');
useHasFeature =
document.implementation &&
document.implementation.hasFeature &&
// `hasFeature` always returns true in Firefox 19+.
// always returns true in newer browsers as per the standard.
// @see http://dom.spec.whatwg.org/#dom-domimplementation-hasfeature
document.implementation.hasFeature('', '') !== true;
}
@@ -45,15 +45,16 @@ if (ExecutionEnvironment.canUseDOM) {
* @license Modernizr 3.0.0pre (Custom Build) | MIT
*/
function isEventSupported(eventNameSuffix, capture) {
if (!testNode || (capture && !testNode.addEventListener)) {
if (!ExecutionEnvironment.canUseDOM ||
capture && !('addEventListener' in document)) {
return false;
}
var element = document.createElement('div');
var eventName = 'on' + eventNameSuffix;
var isSupported = eventName in element;
var isSupported = eventName in document;
if (!isSupported) {
var element = document.createElement('div');
element.setAttribute(eventName, 'return;');
isSupported = typeof element[eventName] === 'function';
}