yangjidaimin的专栏

1： js中准确判断数据类型Object.prototype.toString.call(var).slice(8,-1).toLowerCase() 返回值”object”,”array”,”function”,”null”,”undefined”,”string”,”number”,”boolean”

1：页面中的元素显示或者隐藏会触发页面的滚动监听事件。.parent { height: 100%; overflow: scroll;}.child { background-color: red; height: 1000px;}.load { width: 100%; height: 50px; background-color: #f0f;}<div

单例模式：var singleton = (function () { var instance; function init() { function privateMethod() {} var privateVar; return { publicMethod: function() {} publicVar: '' };...

1：不创建新的变量交换a,b的值var a = 1, b = 2;a = a + b;b = a - b;a = (a - b) / 2;2：冒泡排序var a = [7,9,4,5,6,21,32,45,56,7,16,17,19,99];a = bubleSort(a);function bubleSort(a) { var tmp; var aLen = a.l...