jQuery TutorialLesson 3Free preview

jQuery Get Started

This lesson is part of jQuery · All levels

Summary

Starting jQuery means putting a library file into a page and then writing code once the document is ready. The code should be placed inside the $(document).ready() so that the HTML element is available when selected. Another alternative is to put a script tag at the end of the body so that the DOM is already formed before the script is executed.

Key points

jQuery is loaded with script tags, both from CDN and local files
$(document).ready() ensures the code runs after the DOM is completed
Scripts run before the DOM is ready often fail to find the elements
The jQuery version should be set explicitly to be stable
A page can have jQuery more than once, but it should be enough once.

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.