44 lines
1.2 KiB
JavaScript
44 lines
1.2 KiB
JavaScript
/*********************************************************************
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* DOM 底层补丁 *
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**********************************************************************/
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//safari5+是把contains方法放在Element.prototype上而不是Node.prototype
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if (!DOC.contains) {
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Node.prototype.contains = function(arg) {
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return !!(this.compareDocumentPosition(arg) & 16)
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}
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}
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Anot.contains = function(root, el) {
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try {
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while ((el = el.parentNode)) if (el === root) return true
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return false
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} catch (e) {
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return false
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}
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}
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//========================= event binding ====================
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let eventHooks = Anot.eventHooks
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if (DOC.onmousewheel === void 0) {
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/* IE6-11 chrome mousewheel wheelDetla 下 -120 上 120
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firefox DOMMouseScroll detail 下3 上-3
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firefox wheel detlaY 下3 上-3
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IE9-11 wheel deltaY 下40 上-40
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chrome wheel deltaY 下100 上-100 */
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eventHooks.mousewheel = {
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type: 'wheel',
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fix: function(elem, fn) {
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return function(e) {
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e.wheelDeltaY = e.wheelDelta = e.deltaY > 0 ? -120 : 120
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e.wheelDeltaX = 0
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Object.defineProperty(e, 'type', {
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value: 'mousewheel'
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})
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fn.call(elem, e)
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}
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}
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}
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}
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