How to use Vanilla JavaScript to toggle a click event on a list item (LI) that

I have a script that scans through a webpage and identifies a unique string, for example: multus –a –um. The page contains several <LI> elements with various text content, including instances of multus –a –um. I need a solution to locate an <LI> element on the page that contains a specific string, and then apply custom CSS changes to that particular element.

For instance:

  1. Execute the script and find: multus –a –um
  2. Search for the <LI> element containing multus –a –um
  3. Modify the background color of that element to #17af50

This functionality should be encapsulated within a function for ease of execution.

javascripthtmlcss

Answer №1

Discover the amazing Array methods available. They can greatly enhance your coding experience.

Array
  .from(document.querySelectorAll("li"))
  .filter(function(item){ return item.innerText.indexOf("foo") !== -1; })
  .forEach(function(item){ item.parentNode.classList.add("highlight"); });
.highlight { background-color: #17af50; }
<ul>
  <li>bar</li>
  <li>foo bar</li>
</ul>

<ul>
  <li>bar</li>
  <li>bar</li>
</ul>

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