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JS逼格(实用)代码-移动端
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// 1. 设置变量为undefined | |
var UNDEFINED = void 0; | |
// 2. 判断支不支持touch事件 | |
var IsTouch = 'ontouchend' in window; | |
// 3. 各端事件兼容 | |
START_EVENT = IsTouch ? 'touchstart' : 'mousedown'; | |
MOVE_EVENT = IsTouch ? 'touchmove' : 'mousemove'; | |
END_EVENT = IsTouch ? 'touchend' : 'mouseup'; | |
// 4. 判断数字正则(正数、负数、浮点数) | |
var NUMBER_REG = /\-?[0-9]+\.?[0-9]*/g; | |
// 5. CSS3私有属性 | |
var CSS_PREFIX_MAP = ["webkit", "moz", "ms", "o", ""]; | |
// 6. 移动端event | |
var e, touches; | |
touches = event.touches && (event.touches.length ? event.touches : [event]); | |
e = (event.changedTouches && event.changedTouches[0]) || (event.originalEvent && event.originalEvent.changedTouches && event.originalEvent.changedTouches[0]) || touches[0].originalEvent || touches[0]; | |
e.clientX // X坐标 | |
e.clientX // Y坐标 | |
// 7. 空函数 | |
var loop = function() {} | |
// 8. 自执行匿名函数(严格模式) | |
;(function(win, doc, $){ | |
// code | |
})(window, document, window.Zepto || window.jQuery); | |
// 9. 判断IE10、11 | |
var browser = { | |
ie10: window.navigator.msPointerEnabled, | |
ie11: window.navigator.pointerEnabled | |
} | |
// 10. 检测touch事件 | |
// 检测 | |
var support = { | |
// 触摸 | |
touch : (win.Modernizr && Modernizr.touch === true) || (function () { | |
return !!(('ontouchstart' in win) || win.DocumentTouch && document instanceof DocumentTouch); | |
})() | |
}; | |
// 11. | |
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