createobjbyreplace(str,arr) js替换方法保存

<script>
function createobjbyreplace(str,arr){
var len = arr.length;
for(var i=0; i<len; i++){
str = str.replace(arr[i][0],arr[i][1]);
console.log(arr[i])
}
return str;
}
var s = "<span class='relative tag-btn'><i class='circle-close delete-level'data-tid='[rid]'data-qid='[qid]'>X</i><button class='btn btn-gray'>[n]</button></span>";

var a = createobjbyreplace(s,[["[rid]","ddd"],["[qid]","dfdg"],["[n]","dfgdf"]])
console.log(a)
</script>