


请问JavaScript中的()【】{}<>“”./=这些符号都在什么时候用?表示什么意思?那本书里有详细的介绍,麻烦推荐一下
<script><br>function changeImage()<em>这个小括号是什么意思?<br>{<br>element=<em>这里为什么用等号?document.<em>这里为什么用点?getElementById('myimage')<em>既然用括号规范了,为什么里面还要用引号?<br>if (element.<em>为什么有的地方直接用的空格,而这个地方却要用点?src.match("bulbon"))<br> {<br> element.src="/i/eg_bulboff.gif";<br> }<br>else<br> {<br> element.src="/i/eg_bulbon.gif";<br> }<br>}<br></script>
这些符号有没有一本书来详细介绍规范他们的定义。
回复内容:
<script><br>function changeImage()<em>这个小括号是什么意思?<br>{<br>element=<em>这里为什么用等号?document.<em>这里为什么用点?getElementById('myimage')<em>既然用括号规范了,为什么里面还要用引号?<br>if (element.<em>为什么有的地方直接用的空格,而这个地方却要用点?src.match("bulbon"))<br> {<br> element.src="/i/eg_bulboff.gif";<br> }<br>else<br> {<br> element.src="/i/eg_bulbon.gif";<br> }<br>}<br></script>
这些符号有没有一本书来详细介绍规范他们的定义。
你语法都没入门,先去弄本犀牛书看看吧
https://book.douban.com/subject/10549733/
先入个门,尤其是理论,别想着跟着视频做就能学会,要理解这样做的原因

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