javascript：方法之前是什么意思？

Question

What does javascript: before a method means?

I know that it is calling a function, but in what cases should we use it?

What is the difference between javascript:method() and method()?

Answer 1

Inline ' JavaScript: ' (eg onclick="JavaScript:alert('test');" ) used to specify language of a following script snippet. Now it is deprecated and you should not use it. The current HTML language specification does not tell anything about this at all.