JSON.parse

Learn to convert a JSON string into an object with JSON.parse.

Turning text into an object

To turn a text-format value into a JavaScript object, use the built-in parse method. Pass the text as a parameter; the method returns an object.

const text = '{"name": "Alex"}';
const user = parse(text);
// user.name === 'Alex'

If the text is malformed, the method throws an error. Wrap external data in try/catch to handle this safely.

You can pass a reviver function as the second parameter to parse. This function is called for each key-value pair and lets you modify values.

const obj = parse(text, (key, value) => {
  return typeof value === 'string' ? value.trim() : value;
});

Here, all string values are trimmed automatically. A reviver is a handy way to shape data as you read it.

Turn the text in the text variable into an object and assign it to config. Use the built-in parse method.

Show example solution

Call parse with text.
Example solution:
const config = parse(text);

Access a property of the object

const user = parse(text);
const name = user.____;

Show answer

const user = parse(text);
const name = user.name;