Limit precision of floating point numbers in a JSON string in JavaScript

json-limit-precision.js

var testObject = {
    pi: Math.PI,
    e: Math.E,
    one: 1,
    x: 1.5,
    str: "1.2345"
};
 
var places = 2,
    json = JSON.stringify(testObject, function(key, value) {
        // limit precision of floats
        if (typeof value === 'number') {
            return parseFloat(value.toFixed(places));
        }
        return value;
    });
 
console.log(json);