replace:意思取代;(用……)替换,(以……)接替;更换, 赔还;把......放回原处
见名知意替换,replace() 方法用于在字符串中用一些字符替换另一些字符,或替换一个与正则表达式匹配的子串
例子1: var str = "Visit Microsoft!"
console.log(str.replace(/Microsoft/,"Helo"))
输出:"Visit Helo"
全局替换为:
例子2:var str = "Welcome to Microsoft"
str = str + "We are proud to announce that Microsoft has"
str= str + "one of the largest Web Developers sites in the world."
console.log(str.repalce(/Microsoft/g,"W3School"))
输出:Welcome to W3School!We are proud to announce that W3School hasone of the largest Web Developers sites in the world.