摘要:
1、 var str = "<h1>这是一个标题</h1>"; var parser = new DOMParser(); var doc = parser.parseFromString(str, "text/html"); var html = doc.body.firstChild; // 封 阅读全文
摘要:
function isNaN(num) { return typeof num "number" && num !== num; } 判断number: function isNumber(num) { return typeof num "number" && num num; } 阅读全文
摘要:
Array.prototype.forEach = function (cb) { for (var i = 0; i < this.length; i++) { cb(this[i], i, this); } }; Array.prototype.map = function (cb) { var 阅读全文