这些 Javascript 函数是如何运行的？

Question

I have two controls in my form (among others) that run Javascript functions on some event. One of them is a input of type text and I added three Javascript functions to the onblur event separated by a space like this:

<input type="text" onBlur="func1() func2() func3()"></input>

The second control is a combo and to this one I added two Javascript functions to the onchange event separated by a semi-colon like this:

<select "onchange="func1(); func2()">...</select>

My problem is that both of them work. As I know, the correct syntax is the one with semi-colons. Why does the one with spaces work ?

Answer 1

Which browser are you testing this in? It's likely that the browser is trying to "do the right thing" for you. Many browsers, IE in particular, will take a guess at what the developer's intention was when encountering non-standards compliant code.

Answer 2

Semicolons in JavaScript are optional. This is a good blog post to explain: https://mislav.net/2010/05/semicolons/