49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
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var NativeCustomEvent = global.CustomEvent;
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function useNative () {
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try {
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var p = new NativeCustomEvent('cat', { detail: { foo: 'bar' } });
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return 'cat' === p.type && 'bar' === p.detail.foo;
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} catch (e) {
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}
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return false;
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}
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/**
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* Cross-browser `CustomEvent` constructor.
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*
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* https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent.CustomEvent
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*
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* @public
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*/
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module.exports = useNative() ? NativeCustomEvent :
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// IE >= 9
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'undefined' !== typeof document && 'function' === typeof document.createEvent ? function CustomEvent (type, params) {
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var e = document.createEvent('CustomEvent');
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if (params) {
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e.initCustomEvent(type, params.bubbles, params.cancelable, params.detail);
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} else {
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e.initCustomEvent(type, false, false, void 0);
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}
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return e;
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} :
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// IE <= 8
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function CustomEvent (type, params) {
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var e = document.createEventObject();
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e.type = type;
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if (params) {
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e.bubbles = Boolean(params.bubbles);
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e.cancelable = Boolean(params.cancelable);
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e.detail = params.detail;
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} else {
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e.bubbles = false;
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e.cancelable = false;
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e.detail = void 0;
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}
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return e;
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}
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