JavaScript JSON stringify: make it output a one-line compact string

Question

I'm trying to create a custom function for converting a JSON object to a one-line string. For example:

var obj = {
 "name": "John Doe",
 "age": 29,
 "location": "Denver Colorado",
};

I would like to make it output: "{ \"name\": \"John Doe\", \"age\": 29, \"location\": \"Denver Colorado,\"}"

My function below does not work, which makes me wonder how to remove the new lines (hidden) in the output:

function objToCompactString(obj) {
        var result = "\"{";
        Object.keys(obj).forEach(key => {
            result += `"${key}":"${obj[key]}",`;
        });

        result += "}\"";
        return result;
}

By the way what you are showing there is not "a JSON object". That is a javascript object. JSON (by definition) is a string representation of javascript objects and in it's default implementation (before you try to rewrite it) it produces a single line string. — gforce301
– gforce301, Commented Apr 10, 2018 at 22:06

Simon Wicki · Accepted Answer · 2018-04-10 22:05:48Z

22

You may want to have a look at JSON.stringify.

In your case:

var obj = {
    "name": "John Doe",
    "age": 29,
    "location": "Denver Colorado",
};
var result = JSON.stringify(obj);
console.log(result);

answered Apr 10, 2018 at 22:05

Simon Wicki

4,0705 gold badges24 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

TonyW Over a year ago

silly me, I first tried JSON.stringify, but it gave me multiple lines of string, which made me painstakingly reinvent the wheel. lol. thank you thank you :)

Sebastian Simon Over a year ago

@TonyGW The third argument to stringify controls how the string is displayed with newlines and spaces.

Collectives™ on Stack Overflow

JavaScript JSON stringify: make it output a one-line compact string

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related