如何动态加载和使用/调用JavaScript文件? [英] How to dynamically load and use/call a JavaScript file?
本文介绍了如何动态加载和使用/调用JavaScript文件?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要动态加载JavaScript文件，然后访问其内容.
I need to dynamically load a JavaScript file and then access its content.
文件test.js
test = function () {
var pub = {}
pub.defult_id = 1;
return pub;
}()
在这种情况下，它可以正常工作:
In this case it works:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="/test.js"></script>
</head>
<body>
<script type="text/javascript">
console.log(test.defult_id);
</script>
</body>
</html>
但是我需要动态加载它，这样它就无法工作:
But I need to load it dynamically, and that way it does not work:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script type="text/javascript">
function loadjs(file) {
var script = document.createElement("script");
script.type = "application/javascript";
script.src = file;
document.body.appendChild(script);
}
loadjs('test.js');
console.log(test.defult_id);
</script>
</body>
</html>
错误:Uncaught ReferenceError: test is not defined(…)
Error: Uncaught ReferenceError: test is not defined(…)
推荐答案
您可以这样做:
function loadjs(file) {
var script = document.createElement("script");
script.type = "text/javascript";
script.src = file;
script.onload = function(){
alert("Script is ready!");
console.log(test.defult_id);
};
document.body.appendChild(script);
}
有关更多信息，请阅读本文: https: //www.nczonline.net/blog/2009/06/23/loading-javascript-without-blocking/
For more information read this article : https://www.nczonline.net/blog/2009/06/23/loading-javascript-without-blocking/
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