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??? ????? ??? ??????? ????? ????? PageSpeed Insights ?? HTML ????? ?? ???? ??? ??? JavaScript ????? ????? ?? ??? ?????? ( ????? ?? ????? ????? ?? ???? ?????).

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???? ?????? JavaScript ??????? ?????? ????? ?????? ??????? ?????? ????? JavaScript ??????? ?????? ????? ???? ??? ???? ????? ??? ??? ????? ????? ?????? ??????. ???? ??? ?????? ??? ??????? ???? ???????? ??? ???? ????? ????? ????? ????? CSS.

???? JavaScript ????

??? ???? ??????? ?????? ???????? ?????? ?????? ??????? ?????? ??? ????? HTML. ???? ????? ??????? ?????? ???? ??????? ??????? ??????? ????? ????? ?????. ??? ???? ??????? ??? ??? ????? HTML ???? ??? ??? :

< html > < head > < script type="text/javascript " src="small.js" > < / script > < / head > < body > < div > ????? ?????? ! < / div > < / body > < /html >

???????small.js???? ????? ?????? :

* ??????? ??? ???? ?????? ????*

??? ???? ????? ????? ???????? ????? ??? ????? ?????? :

< html > < head > < script type="text/javascript" > * ??????? ??? ???? ?????? ????* < / script > < / head > < body > < div > ????? ?????? ! < / div > < / body > < /html >

???? ??????? ????? ???small.js???? ?? ????? HTML? ??? ???? ??????? ???????? ????.

????? ????? JavaScript

???? JavaScript ?? ??? ????? ????? ?????? ???? ???????? ???? HTML ??? ????????? ??? ????? JavaScript. ???? ???? ?????? :

< script async src = " my.js" >

??? ??? ???? JavaScript ?????? document.write? ??? ???? ??????? ??????? ??? ???????? ?????. ???? ?????? ???????? ????? ???????? document.write ???????? ?????? ???? ????? ?? ???.

???????? ??? ???? ??? ????? JavaScript ???? ??? ??????? ??? ???? ???? ????? ?????? ?? ???? ?????? ??????? ?????? ?????????? ????? ??? ?????? ?? ?? ??????? ????? ?? ???? ?????? ??????? ?????? ?????? ??????? ???????.

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???? ?? ??? ?????? ????? JavaScript ( ??? jQuery)?
???? ??????? ?????? ?? ?????? JavaScript ( ??? jQuery ) ?????? ????? ????? ?????? ????? ????? ????? ?????? ???????? ???? ??? ????? ?????. ??? ???? ???? ????? ???? ??? ????????? ????? ??? ????? ????? ?????? ??????. ?? ?? ??????? ?? ??? ??? ????? ????? ????? ?????? JavaScript ??? ??? ??? ????? ???? ?????.
如果我使用JavaScript框架來構(gòu)造網(wǎng)頁，該如何操作？
??? ?? ????? ????? ???? ????? ?????? JavaScript ?? ???? ??????? ???? ?? ???? ???? ??? ??? ????? ????? ????? JavaScript ??? ????? ????? ?????? ???? ?????? ??????? ?????? ??????. ???????? ???? ?? ???? ??????? ????? ???????? ?? ???? ?????? ??? ????? ????? ????? ???? ????? ?????? ???? ???? ???????? ??????? : ????? ???? JS ??? ??????? ?????? ??????? ?? HTML? ?? ??????? ???? ?????? ??? ????? ???????. ????? ?? ???????? ??? ????? ?? ???? ??????? ????http://youtu.be/VKTWdaupft0? ? = 14m28s.

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???????? ?????? ????? ??? ????? ??? ?????? ???? ?? ?????????? ???????? ????????? 3.0 License)? ?????? ?????? ??????? ????? ??????? (???? Apache 2.0 License?? ??? ?????????? ???????????? ????????.