Pretty print JSON with native Javascript

The native JSON.stringify has an option to make the output more readable by adding spaces to the string.

Example:

var someObject = { "test": 123, "others": [ { "abc": 1 }, { "xyz": 999 } ] };

JSON.stringify(someObject, undefined, 2);

The return will be:

{
 "test": 123,
 "others": [
 {
 "abc": 1
 },
 {
 "xyz": 999
 }
 ]
}

The second parameter is a replacer, which basically works like a filter to ignore certain values.

For more info: https://developer.mozilla.org/en-US/docs/Using_native_JSON

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