var regx = new RegExp('are','g');
var regx1 = /are/g;  //常用的创建方式

var regx1 = /are/g; //常用的创建方式
console.log("source:"+regx.source +" global:"+regx.global+" ignoreCase:"+regx.ignoreCase +" multiline:"+regx.multiline);
// source:are global:true ignoreCase:false multiline:false

for(var p in regx) { //不会进入该for循环
 if(regx.hasOwnProperty(p)) {
 console.log(regx[p]);
 }
}

var regx1 = /are/g;
var res = regx.test('you are a good boy!');
console.log(res) ; //true
var res1 = regx.test('I am a good boy!');
 console.log(res1) ; //false

 var regx = /fn:(\w+)\s+ln:(\w+)\s/g;
 var s ="your fn:xiaoxin ln:tang right";
 var result = regx.exec(s);
 console.log(result.input); //your fn:xiaoxin ln:tang right"htmlcode">

var regx = /fn:(\w+)\s+ln:(\w+)\s/g;
var s ="your fn:xiaoxin ln:tang right";
var result = regx.exec(s);
console.log(RegExp.input); //your fn:xiaoxin ln:tang right"htmlcode">

var s = 'I am a good boy,you are also a good boy !';
var regx = /good.*boy/g; //贪婪匹配
console.log(regx.exec(s)[0]); //good boy,you are also a good boy
var regx1 = /good.*"_blank" href="https://www.jb51.net/article/73290.htm">javascript正则表达式和字符串RegExp and String（二）希望大家喜欢。


                                
                                

                                    正则表达式regexp,js正则表达式regexp,string正则表达式,js_string正则表达式 
                                
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