JQuery Getting Started Guide: Get started with three steps

This article will guide you how to quickly get started with jQuery, which can be easily mastered even if you are a newbie of jQuery. There are two main methods: hosting jQuery packages by yourself and using Google CDN.

Method 1: Host the jQuery package by yourself (recommended)

1. Download: Download the latest version of jQuery compression package from the jQuery official website (it is recommended to use a compressed version, the file is smaller and the loading speed is faster).
2. Save: Save the downloaded jQuery file to the js folder in the project.
3. Introduction: Add the following code to your webpage (replace path/to/jquery.min.js with the actual file path):

Method 2: Use Google CDN

This method does not require downloading and loads jQuery directly through Google's CDN, but the speed depends on network status and the availability of Google CDN.

Add the following code to your page:

jQuery FAQ

• How to check if jQuery is installed correctly? Write a simple jQuery script to operate on the DOM element, and if the script is running normally, jQuery is installed correctly.

• The difference between compressed version and uncompressed version jQuery? The compressed version (minified) has been optimized, loading faster, suitable for production environments; the uncompressed version is easier to read and debug, suitable for development environments.

• Can jQuery be used with other JavaScript libraries? Yes, but there may be conflicts (e.g. conflicts of $ symbols). This problem can be solved using jQuery's noConflict() method.

• The function of the

  $(document).ready()? Make sure to execute jQuery code after the document is loaded to avoid errors caused by the element not loading.

• How to use CDN to introduce jQuery? Add a CDN link to HTML, the browser may have cached the file, which will load faster.

• The advantages of jQuery over native JavaScript? jQuery simplifies DOM operations and event processing and provides cross-browser compatibility.

• How to update the jQuery version? Download the latest version and replace the old file, or update the version number in the CDN link.

• Can multiple jQuery versions be used on the same page? Yes, but not recommended, it can easily lead to conflicts.

• Frequently encountered problems and troubleshooting methods that you may encounter when setting up jQuery? Frequently asked questions include conflicts with other libraries, file loading failures, code syntax errors, etc. Check if jQuery is loading correctly, look for library conflicts, and use JavaScript debugging tools to find and fix syntax errors.

I hope the above information can help you get started with jQuery quickly!

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