To convert a set to a string in JavaScript, call the Array.from() method with the Set as an argument, then call the join() method on the resulting array. For example:
const set = new Set(['x', 'y', 'z']);
const str1 = Array.from(set).join(' ');
console.log(str1); // x y z
const str2 = Array.from(set).join(',');
console.log(str2); // x,y,z
The Array.from() method converts an array-like object like a Set into an array:
const set = new Set(['x', 'y', 'z']);
console.log(Array.from(set)); // [ 'x', 'y', 'z' ]
After the conversion, we can call the join() method on the array. join() returns a string containing the elements of an array concatenated with the specified separator:
console.log(['x', 'y', 'z'].join('-')); // x-y-z
console.log(['x', 'y', 'z'].join('/')); // x/y/z
Note: We can also use the spread syntax (...) to convert a Set to an array:
const set = new Set(['x', 'y', 'z']);
const str1 = [...set].join(' ');
console.log(str1); // x y z
const str2 = [...set].join(',');
console.log(str2); // x,y,z
The spread syntax unpacks the values of the Set into a new array that we call join() on to get the string.
Every Crazy Thing JavaScript Does
A captivating guide to the subtle caveats and lesser-known parts of JavaScript.
Ayibatari Ibaba is a software developer with years of experience building websites and apps. He has written extensively on a wide range of programming topics and has created dozens of apps and open-source libraries.
