JavaScript - convert a string of numbers to an array of numbers

In this article, we would like to show you how to convert a string of numbers to an array of numbers in JavaScript.

Quick solution (ES6):

// ONLINE-RUNNER:browser;

const string = '1,2,3,4';

const result = string.split(',').map((item) => parseInt(item, 10));

console.log(result); // [ 1, 2, 3, 4 ]

Practical example

In this example, we use split() method to split string into an array of strings by a comma separator (','). Then we use map() method with parseInt() to convert the array of strings into an array of numbers.

// ONLINE-RUNNER:browser;

var string = '1,2,3,4';

var result = string.split(',').map(function(item) {
    return parseInt(item, 10);
});

console.log(result);           // [ 1, 2, 3, 4 ]
console.log(typeof result[0]); // number

See also

1. JavaScript - get all numbers in string and push them to array

References

1. String.prototype.split() - JavaScript | MDN
2. Array.prototype.map() - JavaScript | MDN
3. parseInt() - JavaScript | MDN