How should I organise my jquery code to make it dry?

Question

I am struggling on how to organise my jquery code.

I have the following functions:

function Function1() {
  $('a').not('a.dialog').click(function(event){
    // Do something.
  });
};

function Function2() {
  $('a.dialog').click(function () {
    // Do something.
  });
};

Function1 is called on every page, function2 is called only on a single page.

What is the best way to remove the duplication between these two functions specifically the reference to 'a.dialog'.

Should I be using global variables? or is the above code the best I can hope for?

------------------ UPDATE ------------------

The specifics of the two functions are as follows:

Function1 does this: iPhone Safari Web App opens links in new window

Function2 opens a dialog lightbox.

I think it really comes down to what the function does...A simple if check inside can work on both. — epascarello, Jun 20 '13 at 14:32
Why not using a single script file containing both functions and which would be included in both pages ? Btw, considering how http requests and connexions are slow, parsing the same small function twice is probably more efficient. — Virus721, Jun 20 '13 at 14:32
`$('a').click(function(){if($(this).hasClass('dialog')) { DO SOMETHING..}...` — ayyp, Jun 20 '13 at 14:33

score 2 · Answer 1 · answered Jun 20 '13 at 14:34

2

function Function1() {
  $('a').click(function(event){
     if($(this).is('.dialog')) //or .hasClass('dialog')
         //...
     else //...
  });
};

answered Jun 20 '13 at 14:34

A. Wolff

74,033
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This would work, however I would prefer to keep the separation between the two functions. Also this solution would introduce an "if" overhead for most of the pages on the site. – pingu Jun 20 '13 at 14:49
in the if part (for dialog) you could call a external function setted inside the specific page – A. Wolff Jun 20 '13 at 14:55
If you want separation than why do you think you need to combine them in the first place! – epascarello Jun 20 '13 at 15:11
@epascarello - to avoid duplication, as more likely to introduce bugs. Also to avoid the repeat search overhead. – pingu Jun 20 '13 at 15:20
2

Don't worry about `if` overhead, you can execute it tens or hundreds of millions of times before reaching the perceivable 100ms lag threshold... – Esailija Jun 20 '13 at 15:39

score 1 · Accepted Answer · answered Jun 20 '13 at 14:39

1

One way could be to do it like that :

$('a').click(function(){
    alert('work');
})

$('.dialog').unbind().click(function(){
    alert('really work')
})

Reduce the number of if...

Fiddle : http://jsfiddle.net/SJvrD/

answered Jun 20 '13 at 14:39

Karl-André Gagnon

33,662
5
50
75

2

"As of jQuery 1.7, the .on() and .off() methods are preferred to attach and remove event handlers on elements." - just FYI. I imagine they will eventually be deprecated. – rlemon Jun 20 '13 at 15:48

How should I organise my jquery code to make it dry?

2 Answers2