Is there a way to change an object into a string in JavaScript without using JSON.stringify?

Usually I wouldn't approach it this way, but for the sake of a practice exercise, I am attempting to convert an object without relying on JSON.stringify(). Take a look at the object in question:

obj = {
  num: 0,
  string: "string",
  func: function () {},
  emptyString: '',
  null: null,
  undefined: undefined
};

The desired outcome should look like the following:

'{"num":0,"string":"This is a custom string","emptyString":"","null":null}'

Answer №1

Although JSON.Stringify() is typically recommended, let's try a different approach as an exercise:

data = {
  number: 0,
  text: "sample",
  function: function () {},
  emptyText: '',
  none: null,
  notDefined: undefined
};

result = Object
        .entries(data)
        .reduce((accumulator, entry) => {
          if (typeof entry[1] != "function") {
            accumulator += `"${entry[0]}" : "${entry[1]}", `;
          }
          return accumulator;
        }, "`{")
        .slice(1, -2) + "}`";

console.log(result)

Answer №2

    const string = Object
    .entries(input)
    .reduce((accum, element) => {
      if (typeof element[1] != "function" && element[1] !== undefined) {
        if(element[0] === "num" || element[0] === "null"){
          accum += `"${element[0]}":${element[1]},`;
        } else{
        accum += `"${element[0]}":"${element[1]}",`;
      }
      }
      return accum;
    }, "`{")
    .slice(1, -1) + "}";
return string;

I was able to achieve the desired result using the code above, although I believe there may be a more efficient solution out there. Special thanks to Bergi for pointing me towards "polyfills."

Gratitude to everyone who contributed to solving this problem.

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