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javascript convert string to an object


By : sunil patil
Date : May 06 2020, 08:40 AM

I'm have two variable with data and DataConvert I try to convert data like DataConvert

let data="{'one':{'id':'2'},'one':{'id':'2'}}"
let DataConvert={'one':{'id':'2'},'one':{'id':'2'}}

console.info(data)
console.info(DataConvert)

Answer :

The only built-in function that will do it with eval() function :

let data="{'one':{'id':'2'},'two':{'id':'2'}}";
let DataConvert;
eval(`DataConvert = ${data}`);

console.info(data)
console.info(DataConvert)

In your jsfiddle you have \r\n inside some of the strings, which is not valid JavaScript. If you want those to be kept literally in the result, you need to escape them before calling eval():

data = data.replace(/\r/g, '\\r').replace(/\n/g, '\\n');

But this is dangerous if you don't control the source of the string, since it will execute arbitrary expression in data.

If you change the quotes to double quotes, you can use JSON.parse(), which is safer.

let data='{"one":{"id":"2"},"two":{"id":"2"}}';
let DataConvert = JSON.parse(data);

console.info(data)
console.info(DataConvert)

Note :object keys have to be unique, you can't have two properties named "one". I changed the second one to "two" to make it valid.



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