How can I replace single quotes with double quotes in invalid JSON?

Question

JavaScript

But you also need to take into account that in JSON there are pieces of html code with doubles that are nested in singles (at the moment).

Thanks everyone for the replies!

Answer 1

Maybe not the best solution, but in haste:

'use strict';

const invalidJSON = `{"root": {'html': '<div class="header1"></div>', 'fragment': '<div class="footer"></div>'}}`;

let validJSON = invalidJSON.replace(/'/g, '"');
validJSON = validJSON.replace(/="+[A-z0-9]*"/g, (str) => {
    return str.replace(/"/g, '\\"');
});

console.log(validJSON);
// => {"root": {"html": "<div class=\"header1\"></div>", "fragment": "<div class=\"footer\"></div>"}}

Answer 2

If the JSON is from a controlled source (i.e. it is not known to contain destructive code), then you can do this:

var badJson = "{'foo': 'bar'}";
var goodJson = JSON.stringify(eval('(function(){return ' + badJson + ';})()'));