Solve the problem of incomplete loading of jquery.js by the browser

How to handle incomplete browser loading of jquery.js

In website development, jQuery, a powerful JavaScript library, is often used to simplify DOM operations and events. Processing and other operations. However, sometimes we encounter situations where the browser does not load jquery.js completely, causing the page function to not function properly. In this case, we need some processing methods to solve this problem.

1. CDN link failure
   Sometimes we directly reference jQuery's CDN link, but when the network is unstable or the CDN link fails, jquery.js will not be fully loaded. To avoid this situation, it is recommended to use a locally stored jquery.js file or choose a stable CDN link.
2. Use the defer attribute
   Add the defer attribute in the script tag that introduces jquery.js, which allows the browser to execute the script after loading the entire document. This can avoid the situation where jquery.js is not fully loaded due to loading order issues.

<script src="jquery.js" defer></script>

3. Detect whether it is fully loaded
   In order to ensure that jquery.js has been fully loaded, you can add judgment conditions to the page and wait for the jquery object to be available before performing related operations.

function checkJqueryLoaded() {
    if (window.jQuery) {
        //执行相关操作
    } else {
        setTimeout(checkJqueryLoaded, 50);
    }
}
checkJqueryLoaded();

4. Use noConflict mode
   If the page introduces other JavaScript libraries at the same time, a naming conflict may occur, resulting in incomplete loading of jquery.js. You can use jQuery's noConflict mode to solve this problem.

var $jq = jQuery.noConflict();
$jq(document).ready(function() {
    //执行相关操作
});

5. Debug console to check error information
   Use the browser's developer tools (such as Chrome's console) to check whether there are loading errors or other problems. The error information can be used to correct Quickly locate the cause of incomplete loading.

Summary:
When the browser does not load jquery.js completely, we can take the above method to solve this problem. By ensuring the smooth loading of jquery.js, page functions can run normally. I hope these code examples can help developers in need.

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