js,正则表达式,字符串话不多说，请看具体实现代码 //从字符串'Is this all there is'中剪去'is': var str='Is this all there is'; var subStr=new RegExp('is');//创建正则表达式对象 var result=str.replace(subStr,"");//把'is'替换为空字符串 console.log(result);//Is th all there is var subStr=new RegExp('is','i');//创建正则表达式对象,不区分大小写 var result=str.replace(subStr,"");//把'is'替换为空字符串 console.log(result);//this all there is var subStr=new RegExp('is','ig');//创建正则表达式对象,不区分大小写,全局查找 var result=str.replace(subStr,"");//把'is'替换为空字符串 console.log(result);//th all there var subStr=/is/ig;//直接量法创建正则表达式对象,不区分大小写,全局查找 var result=str.replace(subStr,"");//把'is'替换为空字符串 console.log(result);//th all there console.log(str);//Is this all there is 可见replace并不改变原始str以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持wanshiok.com！
js,正则表达式,字符串
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