JavaScript string.slice() Method

1. Syntax of JavaScript string.slice() Method
2. Example Code: Take Both startindex and endindex Values for the string.slice() Method
3. Example Code: Use Negative Indexes for the string.slice() Method

A portion or slice of the input string can be returned using the built-in JavaScript function string.slice(). The startindex and endindex parameters must be specified to get the substring of a string.

Syntax of JavaScript string.slice() Method

string.slice(startindex, endindex);

Parameters

Return

It returns the substring of the supplied string according to the index passed as a parameter.

Example Code: Take Both startindex and endindex Values for the string.slice() Method

const str = "JavaScript is amazing";
let result = str.slice(0, 10);
let result1 = str.slice(14, 21);
console.log(result);
console.log(result1);

Output:

JavaScript
amazing

This code returns the portion of the str string specified in the result and result1 parameters of the string.slice() method.

Example Code: Use Negative Indexes for the string.slice() Method

const str = "JavaScript is an object oriented programming language";
let result1 = str.slice(-9);
let result2 = str.slice(-30, -21);
console.log(result1);
console.log(result2);

Output:

 language
 oriented

If startindex or endindex values are negative, the indexes are counted backward and -1 denotes the final element.