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I started developing a theme for Magento 2.2.0 and now I have to use some external javascript libraries both in my theme and my modules.

So what is the best solution to prevent loading the same library twice?

Should I create a new Module containing my javascript libraries and refernce them in my other modules?

EDIT:

For example I have a Module which requires a specific library like swiper.js. So I would require it somehow with My_Module/path/to/swiper.js. But if I have another Module with the same dependency My_Module2/path/to/swiper.js it now is loaded twice?

In Magento2 I can require jquery and any other core library from anywhere but the documentation says you shouldnt put js into mageroot/lib/web/js.

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  • Can you explain more about the issue So what is the best solution to prevent loading the same library twice??
    – Khoa TruongDinh
    Commented Oct 14, 2017 at 1:11

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You should not have to worry about that. Magento 2 and Require JS are made so that they merge the individual require files and create one large file before the includes are taking place.

More info here: http://inchoo.net/magento-2/javascript-bundling-magento-2/

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  • Ive read that glob post, but what happens if for example you have Vendor_Module1/js/my-lib.js and Vendor_Module2/js/my-lib.js? Isnt it then still included twice?
    – Code Spirit
    Commented Oct 17, 2017 at 11:48

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