Javascript Namespaces, onclick Event, et al

Question

Is this

<input type="button" value="..." 
  onclick="javascript: {ddwrt:GenFireServerEvent('__commit;__redirect={/Pages/Home.aspx}' ) }"
/>

the same (functionally) as

. . .
<script type="javascript/text>
  function runIt() {
    ddwrt:GenFireServerEvent('__commit;__redirect={/Pages/Home.aspx}' );
  }
</script>
<body>
    <input type="button" value="..." 
      onclick="runIt();" />
</body>
</html>

I don't really understand

what role the term "javascript:" in the onclick event description serves. I mean, isn't it the default that what is in the onclick will be javascript?
what role the outer curly braces serve in the ..."javascript: {}".
I recognize that "ddwrt:" is a namespace, but I am not aware of how to specify a namespace within a javascript function, which itself is located within a <script> block.

Don't the outer curly braces in the inline version serve to create an object which has a single field ddwrt to which it then assigns the outcome of the GenFireServerEvent function? (The object would subsequently be discarded so I don't know what purpose it serves, but still) — Bart Enkelaar
– Bart Enkelaar, Commented May 22, 2014 at 15:25
@Bart, nope, it is parsed as a statement block containing a label (ddwrt:) followed by a function call (GenFireServerEvent(...)). Note that surrounding the braces with parentheses or applying an operator would change that story. — Frédéric Hamidi
– Frédéric Hamidi, Commented May 22, 2014 at 15:26
Is that because it's not being assigned to anything? Is that what makes the difference between parsing it as an object and parsing it as a block? — Bart Enkelaar
– Bart Enkelaar, Commented May 22, 2014 at 15:30
So then, Frédéric, what purpose or function does the label serve? — Brian Wren
– Brian Wren, Commented May 22, 2014 at 16:42

Quentin · Accepted Answer · 2014-05-22 15:26:12Z

4

It is a label, and completely useless in this context
They create a block, also useless in this context
No, it is another label and also useless

answered May 22, 2014 at 15:26

Quentin

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3 Comments

Frédéric Hamidi Over a year ago

You're right, the last part of my comment was wrong. The third case is also parsed as a label.

Brian Wren Over a year ago

So Quentin, ...="javascript: GenFrSvrEv('__cmt;__redir={/Home.aspx}' )" (abbrev'd for the purpose of this post) would operate the same?

Quentin Over a year ago

onclick="GenFireServerEvent('__commit;__redirect={/Pages/Home.aspx}')" would operate the same.

Romain · Accepted Answer · 2016-03-03 21:43:09Z

0

In this particular case (Sharepoint) this is NOT javascript, this is parsed by Sharepoint and translated in something like:

onclick="javascript: __doPostBack('ctl00$ctl37$g_c251e0c4_cd3d_4fc0_9028_ab565452bedd','__cancel;__redirect={https://....}')"

have a look at the result source code. That's why you can't call GenFireServerEvent in your javascript code.

answered Mar 3, 2016 at 21:43

Romain

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