JavaScript Reference

Quick Reference

The DOMTokenList replace() method replaces a token in a DOMTokenList, which is a set of space-separated tokens that can be accessed by index.

<!-- html element to place output -->
<p id="my_output" class="my_class my_other_class"></p>
// variable
let my_list = document.getElementById('my_output').classList;

// replace the class
my_list.replace('class3', 'class4');

Output

(no output; the specified class simply replaced by the new class)

Syntax

domtokenlist.replace(old, new)

JavaScript Notes:

  • When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • JavaScript is a case-sensitive language; firstName is NOT the same as firstname
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
  • JavaScript variables must begin with a letter, $, or _
  • JavaScript variables are case sensitive (x is not the same as X)

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.