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JavaScript delayed loading defer test_javascript skills

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May 16, 2016 pm 05:45 PM

defer

Occasionally I discovered that there is a delayed loading tag defer in js, and I am still wondering why such a useful thing has not become popular.
Tested several browsers. It works under IE7, 8, 9 and 360 secure browsers. This is why you don't choose defer.

Copy code The code is as follows:

.org/1999/xhtml">

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