javascript - js A small algorithm question, looking for a better answer.

Question

1. String type"[[1,2],[2,4],[3,6],[1,2]]", hope to get array type[ [1,2],[2,4],[3,6],[1,2]]

Answer 1

var arr = JSON.parse("[[1,2],[2,4],[3,6],[1,2]]");

Answer 2

Process ->

var str =  "[[1,2],[2,4],[3,6],[1,2]]";
var newStr = JSON.parse(str);
.log(newStr);

Packaging ->

function g(str){
    return JSON.parse(str);
};

Answer 3

You can just search for JSON.parse. Baidu is better for this kind of problem