是否需要外部 .js 文件<script> tags?

Question

外部 .js 文件是否需要内部和包含标签才能工作？

Answer 1

No they're not needed, in fact you'll get a syntax error if you include them.

Your .js files should contain only JavaScript, no HTML tags around it, like would have inside a page.

Answer 2

No, it does not. The external file just needs the code.
Then you just need to do <script src="file.js" type="text/javascript"></script> .

Answer 3

外部 Javascript 不应包含标签。

Answer 4

No, <script> tags are not needed otherwise error occurs.

For example, external.js has alert function with <script> tags.

external.js:

<script>
    alert('external')
</script>

Then, external.js is added to index.html .

index.html:

<script type="text/javascript" src="external.js"></script>

Then, error occurs. (I used google chrome )

Uncaught SyntaxError: Unexpected token '<'

So, only alert function is fine without <script> tags.

external.js:

alert('external')