How to use external(http) library in a JS file
This question already has an answer here:
尝试这个：
var fileref=document.createElement('script');
fileref.setAttribute("type","text/javascript");
fileref.setAttribute("src", "https://apis.google.com/js/api.js");
I'm a little fuzzy on this myself, but I seem to recall that scripts can't easily call scripts from other domains, in order to avoid violating the "single source" rule.
The typical techniques are to either do a ajax request, followed by an eval, or inject a <script> tag into the header, which causes the browser's interpreter to fetch the resource, but might be a little late in the execution process depending on what you are hoping to accomplish.
What I've done for this is to use the Require.js framework, which handles all the various oddities of the various sandboxes. It's a little tough to get your head around, but maybe worth it.
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