<html>
<head>
</head>
<body>
<div id="test-div" class="red blue redblue greenred green red"></div>
<script type="text/javascript">
"use strict";
var console = window.console;
var $ = window.$;
var url = 'https://join.yuewen.com/social.html?key=fds';
//split() 方法用于把一个字符串分割成字符串数组，并且具有数组的属性。此时key=["a=1","b=2"];
var key = url.split('?')[1].split('&');
// 建立一个空object对象来储存新的object对象
var obj = {};
// 循环遍历数组的每一项，并且将a=1格式转换成a:1
for(var i=0;i<key.length;i++) {
var arr = key[i].split('=');
var name = arr[0];
obj[name] = arr[1];
}
console.log(obj);
</script>
<script type="text/javascript">
function removeClass(target,remove) {
// 判断这个class前后是否有空格来判断他是不是一个独立的class 而不是包含在另一字符串里面的class
var re = new RegExp('\\s+'+ remove +'\\s+', 'g');
// 因此要在将这串classname的前后都加上空格
target.className = " " + target.className+ " ";
// 判断改字符串是否符合正则
if (re.test(target.className)){
// 若是则将这个这个字符和他的前后空格移除
target.className = target.className.replace(re ,"");
console.log('移除red这个class后的classname为：');
console.log(target.className);
}
else{
console.log("has no class "+ remove);
}
}
var target = document.getElementById('test-div');
removeClass(target,"red");
</script>
<script type="text/javascript">
String.prototype.encodeHTML = function() {
var newStr = "";
if (this.length == 0) {
return "";
} else {
newStr = this.replace(/&/g,"&").replace(/</g,"<").replace(/\"/g,""").replace(/>/g,">");
return newStr;
}
};
console.log('转义后的字符串为：' + '<a href=""> </a>'.encodeHTML());
</script>
<script type="text/javascript">
var divide = function(loaded,total) {
var result = (loaded / total)*10000 / 100;
result = result.toFixed(2) + '%';
console.log(result);
}
divide(33,100);
divide(3,100);
divide(0.3,100);
</script>
</body>
</html>
