var phone='13511115678'; //方法一 var newphone=phone.substr(0, 3) + '****' + phone.substr(phone.length - 4); //方法二 var newphone= phone.replace(phone.substr(3, 4),"****") //方法三 var newphone=phone.replace(/(d{3})d{4}(d{4})/, '$1****$3'); //方法四 var newphone=phone.replace( /([0-9]{3})([0-9]{4})([0-9]{4})/,"$1****$3")
详解方法三和四,如下:
此外,上述$1、$2、$3是将数字分隔开,比如讲中间四位和后四位互换位置 13511115678 -> 13556781111
var newphone=phone.replace(/(d{3})d{4}(d{4})/, '$1$3$2'); // 13556781111