js中substr与substring的区别；nodetype返回类型-js difference between substr and substring the nodetype return type

Test String.prototype.replace.

String.prototype.format=function(){ if(arguments.length==0) return this var args=[], i=0 for( i<arguments.length i++) args[i]=arguments[i] return this.replace(/\ [sSfdDTt\ ]/g, function(m){ if(m== ) return var v=a

JS interception string and substring substr method of difference