How can I programmatically check a checkbox in Coffeescript ?

I know in Javascript, I can use this :

myElement.checked = true

Can I do something like the following in Coffeescript ?

myElement.checked "true"

I have already tried the above but it isn't working for me.

Any help in this regard will be highly appreciated. Thanks.

How can I programmatically check a checkbox in Coffeescript ?

I know in Javascript, I can use this :

myElement.checked = true

Can I do something like the following in Coffeescript ?

myElement.checked "true"

I have already tried the above but it isn't working for me.

Any help in this regard will be highly appreciated. Thanks.

• javascript
• ruby-on-rails
• validation
• coffeescript

Share Improve this question Follow asked Aug 16, 2012 at 6:09 MyxticMyxtic 5,69955 gold badges5050 silver badges6969 bronze badges 4

• 1 Is myElement a checkbox? I suspect something else is wrong. You could post some relevant code. Eg: When are you trying to call this? How are you selecting myElement etc. – Robin Maben Commented Aug 16, 2012 at 6:25
• 1 If myElement.checked = true works in JavaScript then myElement.checked = true should also work in CoffeeScript. – mu is too short Commented Aug 16, 2012 at 6:28
• Yes, myElement is a checkbox. I am selecting it using it's ID. Also, myElement.disable "true" is disabling the checkbox absolutely fine in CoffeeScript. And so it seems there's no problem with the selection of the element. – Myxtic Commented Aug 16, 2012 at 6:40
• @muistooshort: You're right, myElement.checked = "yes" works perfectly in plain javascript. – Robin Maben Commented Aug 16, 2012 at 6:51

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 4

UPDATE:

myElement.checked = "yes";

myElement.checked = null;// for unchecking

So, for your case,

a.checked = b.checked; //i.e. check a if b is checked

Example here

---

//CoffeeScript
a = {}
a.b = 10
alert a.b

Compiles to..

//javascript
var a;
a = {};
a.b = 10;
alert(a.b);

However, a.b 10 piles to a.b(10) in javascript, which is not what you want. :)

Your myElement is jQuery object and you want to address DOM element:

// HTML
<input class="toggle" type="checkbox"/>


//coffeescript

$('.toggle')[0].checked = true