How to use 'parsestring' in JavaScript

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lintopher0315/Quick-Math

3 function parseString(str) {
4   try {
5     if (str[0] === '"') {
6       return JSON.parse(str);
7     }
8 
9     if (str[0] === "'" &amp;&amp; str.substr(str.length - 1) === "'") {
10       return parseString(
11         str
12           .replace(/\\.|"/g, (x) =&gt; (x === '"' ? '\\"' : x))
13           .replace(/^'|'$/g, '"')
14       );
15     }
16 
17     return JSON.parse('"' + str + '"');
18   } catch (e) {
19     return str;
20   }
21 }

3	function parseString(str) {
4	try {
5	if (str[0] === '"') {
6	return JSON.parse(str);
7	}
8
9	if (str[0] === "'" && str.substr(str.length - 1) === "'") {
10	return parseString(
11	str
12	.replace(/\\.\|"/g, (x) => (x === '"' ? '\\"' : x))
13	.replace(/^'\|'$/g, '"')
14	);
15	}
16
17	return JSON.parse('"' + str + '"');
18	} catch (e) {
19	return str;
20	}
21	}

How to use 'parsestring' in JavaScript

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