javascript - 检查外部js文件是否已经加载

Question

在ajax请求成功时，我使用加载脚本，

$.getScript(base_url + 'js/js_to_be_loaded.js');

有什么方法可以检查该特定脚本是否已加载？

谢谢。

Answer 1

您只需要实现一个success回调函数。

jQuery.getScript( url [, success(script, textStatus, jqXHR)] )

像：

$.getScript(base_url + 'js/js_to_be_loaded.js', onSuccess);

function onSuccess(...)
{
    // in this function you are guaranteed that it is loaded
    // so you can execute code based on the loaded js file or
    // set flags to let your code "know" that it is loaded
}