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jquery dynamic loading js file implementation steps

php中世界最好的语言Original: 2018-04-23 11:35:133476browse

This time I will bring you jquery the steps to implement dynamic loading of js files, what are the precautions for jquery to dynamically load js files, the following is a practical case, let's take a look.

Question:

If you use jquery append to load the script tag directly, an error will be reported. In addition to document.write, is there any other better way to dynamically load js files.

Solution:

1. jquery method

$.getScript("./test.js");  //加载js文件
$.getScript("./test.js",function(){  //加载test.js,成功后，并执行回调函数
  console.log("加载js文件");
});

2. js method

<html>
<body>
</body>
</html>
<script type="text/javascript">
function loadScript(url, callback) {
  var script = document.createElement("script");
  script.type = "text/javascript";
  if(typeof(callback) != "undefined"){
    if (script.readyState) {
      script.onreadystatechange = function () {
        if (script.readyState == "loaded" || script.readyState == "complete") {
          script.onreadystatechange = null;
          callback();
        }
      };
    } else {
      script.onload = function () {
        callback();
      };
    }
  }
  script.src = url;
  document.body.appendChild(script);
}
loadScript("jquery-latest.js", function () { //加载,并执行回调函数
  alert($(window).height());
});
//loadScript("jquery-latest.js"); //加载js文件
</script>

I believe you have already read the case in this article After mastering the method, please pay attention to other related articles on the php Chinese website for more exciting content!

jquery dynamic loading js file implementation steps

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