进行了一些小修复
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/**
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* Passive event listener polyfill
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*
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* Patches addEventListener so scroll-blocking events (touchstart, touchmove,
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* wheel, mousewheel) default to { passive: true } unless explicitly set to
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* false. Eliminates Chrome Violation warnings from third-party libraries.
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*/
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(function () {
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'use strict';
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var opts = Object.defineProperty({}, 'passive', {
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get: function () { window.__passiveSupported = true; }
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});
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window.addEventListener('test', null, opts);
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if (!window.__passiveSupported) return;
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var orig = EventTarget.prototype.addEventListener;
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var passiveEvents = { touchstart: 1, touchmove: 1, wheel: 1, mousewheel: 1 };
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EventTarget.prototype.addEventListener = function (type, listener, options) {
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if (passiveEvents[type] && typeof options !== 'object') {
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options = { passive: true, capture: options };
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}
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orig.call(this, type, listener, options);
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};
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})();
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