1.eval()
var str = '{ "firstName":"John" , "lastName":"Doe" }' let obj = eval("(" + str + ")") console.log(typeof obj); console.log(obj);
2.JSON.parse()
var str = '{ "firstName":"John" , "lastName":"Doe" }' let obj = JSON.parse(str) console.log(typeof obj); console.log(obj);
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