YogeshChauhan . com

The substr() method in JavaScript and how it’s different from substring()

in JavaScript on March 4, 2021

We saw a few examples for substring() in this post.

Let’s understand how substr() works.

substr() method in JavaScript


string.substr(from, numberOfCharacters)

Things to remember

  1. The from argument is the position you want to start the substring from and numberOfCharacters argument is the total number of characters you want to take out.
  2. from is required and numberOfCharacters is optional. If you don’t specify numberOfCharacters then it will give you the rest of the string in return from the specified starting index.
  3. First character starts at zero and if we specify from greater or equal to the number of characters in the string then it will return an empty string.
  4. If from is negative then it will use it as an index from the end of the string.


Get first 6 characters from a string using substr()

var str = "YogeshChauhan.com";
var sub = str.substr(0,6);

Get the rest of the string skipping the first 6 characters using substr()

var str = "YogeshChauhan.com";
var sub = str.substr(6);

Get the first character from the string using substr()

var str = "YogeshChauhan.com";
var sub = str.substr(0,1);

Get the last character from the string using substr()

var str = "YogeshChauhan.com";
var sub = str.substr(str.length-1,1);

The difference between substring() and substr()

The substr() method takes out parts of a string just like substring() does. The subtle difference is in the way it works and how it works.

substring() takes two arguments, start and end for the substring you want. substr() takes two arguments too and the first argument is the start of the substring as well. The only difference is the second argument we pass. In substr() we need to pass the number of characters we want in a substring.


Most Read

#1 How to check if radio button is checked or not using JavaScript? #2 Solution to “TypeError: ‘x’ is not iterable” in Angular 9 #3 How to add Read More Read Less Button using JavaScript? #4 How to uninstall Cocoapods from the Mac OS? #5 How to Use SQL MAX() Function with Dates? #6 PHP Login System using PDO Part 1: Create User Registration Page

Recently Posted

Jun 16 What are Stored Procedures for SQL Server? Jun 16 What are Class Constants in PHP? Jun 15 A short basic guide on states in React Jun 15 How to define constants in PHP? Jun 15 How to define visibility for a property in PHP? Jun 15 How to use @if and @else in SCSS?

You might also like these

The :last-of-type selectorCSSHow to create rotating texts using JavaScript and CSS?CSS3 Common Usability Mistakes In Web DesignUI/UXFull and Partial ROLLUP in Postgresql with ExamplesPostgresWindow setInterval() Method in JavaScriptJavaScriptContainers 101: What are containers?Misc