JavaScript 中的replace方法

JavaScript 中的replace方法(全部替换replaceAll效果)

JavaScript中replace() 方法如果直接用str.replace("-","!") 只会替换第一个匹配的字符. 
而str.replace(/\-/g,"!")则可以替换掉全部匹配的字符(g为全局标志)。

str.replace(/\'-' /g,"!") '-' 是你想要被替换的字符.

function ieStr2ascii(str) {
var re = /%/g;
str = str.replace(re,"%25");

var re = /=/g;
str = str.replace(re,"%3d");

re = /\?/g;
str = str.replace(re,"%3f");

re = /\'/g;
str = str.replace(re,"%27");

re = /&/g;
str = str.replace(re,"%26");

return str;
}

 实例：

function encodeURL(str){
	return encodeURI(str).replace(/=/g,"%3D").replace(/\+/g,"%2B").replace(/\?/g,"%3F").replace(/\&/g,"%26");
}

function htmlEncode(str) {
	return str.replace(/&/g,"&amp;").replace(/\"/g,"&quot;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/ /g,"&nbsp;");
}

function htmlDecode(str) {
	return str.replace(/\&quot;/g,"\"").replace(/\&lt;/g,"<").replace(/\&gt;/g,">").replace(/\&nbsp;/g," ").replace(/\&amp;/g,"&");
}