JSON Stringify Ouput to Multiple Lines

you can also use.

var json = JSON.stringify({ uno: 1, dos : {"s":"dd","t":"tt"} }, null, '\t');
console.log(json);

Or even better, the count of spaces in the indentation:

var json = JSON.stringify({ uno: 1, dos : {"s":"dd","t":"tt"} }, null, 2);

You can use the space parameter of the stringify method. From the official page, here is the relevant excerpt:

JSON.stringify({ a: 2 }, null, " ");   // '{\n "a": 2\n}'

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