使用远程src注入脚本标记并等待它执行 [英] inject a script tag with remote src and wait for it to execute
问题描述
如何将< script src =https://remote.com/>< / script> 元素注入我的页面，等待它要执行，然后使用它定义的函数吗？
How can I inject a <script src="https://remote.com/"></script> element into my page, wait for it to execute, and then use functions that it defines?
FYI：在我的情况下，脚本会在极少数情况下进行一些信用卡处理，所以我不这样做想要永远包括它。我希望在用户打开更改信用卡选项对话框时快速包含它，然后向其发送新的信用卡选项。
FYI: In my case, the script will do some credit card processing in rare cases, so I don't want to include it always. I want to include it quickly when the user opens up a change-credit-card-options dialog, and then send it the new credit card options.
编辑其他详细信息：我无法访问远程脚本。
Edit for additional detail: I do not have access to the remote script.
推荐答案
您可以使用 Google Analytics 或 Facebook 的方法：
(function(d, script) {
script = d.createElement('script');
script.type = 'text/javascript';
script.async = true;
script.onload = function(){
// remote script has loaded
};
script.src = 'http://www.google-analytics.com/ga.js';
d.getElementsByTagName('head')[0].appendChild(script);
}(document));
更新：
以下是新的Facebook方法;它依赖于现有的脚本标记，而不是< head> ：
Below is the new Facebook method; it relies on an existing script tag instead of <head>:
(function(d, s, id){
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)){ return; }
js = d.createElement(s); js.id = id;
js.onload = function(){
// remote script has loaded
};
js.src = "//connect.facebook.net/en_US/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
- 替换
facebook-jssdk使用您的唯一脚本标识符，以避免多次附加。 - 将脚本的url替换为您自己的。
- Replace
facebook-jssdkwith your unique script identifier to avoid it being appended more than once. - Replace the script's url with your own.
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