The JavaScript toString() method converts a variable (or a value) to a string.
It is a built-in method for many data types, including numbers, arrays, dates, and objects.
The method is useful for
- Converting data to a readable format for display
- Ensuring type compatibility when a string is required
- Customizing objects other user interfaces
- Customizing objects for debugging
JavaScript Array toString()
When used on an array, toString() returns the array elements as a comma separated string.
Example
const fruits = ["Banana", "Orange", "Apple", "Mango"];
let myList = fruits.toString();JavaScript Date toString()
When used on a date, toString() returns a human-readable date and time string.
Example
const d = new Date();
let text = d.toString();JavaScript Number toString()
When used on a number, toString() returns the number as a string.
Example
let x = 123;
let text = x.toString();Convert a number to a string, using base 2 (binary):
Example
let x = 123;
let text = x.toString(2);JavaScript Function toString()
When used on a function, toString() returns the source code of the function as a string.
JavaScript Object toString()
When used on an object, toString() an object returns "[object Object]".
To provide a meaningful string representation, it can be overridden in the object definition:
Example
let person = {
firstname: "John", lastname: "Doe", }
let text = person.toString();