The ie8 browser does not support the methods of endsWith,
trim (),
startsWith, etc., you will encounter compatibility problems in use
Solution:
Rewrite the above method:
1, trim, ltrim or rtrim
Use regular expressions
String.prototype.trim=function(){
return this.replace(/(^\s*)|(\s*$)/g, "");
}
String.prototype.ltrim=function(){
return this.replace(/(^\s*)/g,"");
}
String.prototype.rtrim=function(){
return this.replace(/(\s*$)/g,"");
}2. StartWith rewrite
String.prototype.startWith=function(str){
if(str==null||str==""||this.length==0||str.length>this.length)
return false;
if(this.substr(0,str.length)==str)
return true;
else
return false;
return true;
}
//或者使用正则表达式，方法如下
String.prototype.startWith = function(str) {
var reg = new RegExp("^" + str);
return reg.test(this);3. Rewrite endsWith
String.prototype.endWith=function(str){
if(str==null||str==""||this.length==0||str.length>this.length)
return false;
if(this.substring(this.length-str.length)==str)
return true;
else
return false;
return true;
}
//或者使用正则表达式
String.prototype.endWith = function(str) {
var reg = new RegExp(str + "$");
return reg.test(this);
}note:
The above method: all put in $ (function () {
The above method
})；
