Javascript: How do I increment my variable by 1 onclick?

Question

I have a 2d array of images called "onClickCard",

What I'm trying to do is make is so that every time I click one of the images in the 2d array I increment my variable called "click" by 1.

running the following:

    var click = 0; 
    var click=onclick.click+1

I just get a console error stating "Uncaught TypeError: Cannot read property 'click' of null: onClickCard, onclick"

edits:

I tried the below suggestion of

var click = 0;
window.onclick=function(){click ++;}

and each click is still returning 0.

You can't click a variable! Your code is trying to do that... — bfavaretto
– bfavaretto, Commented Sep 27, 2013 at 22:26
click+=1; inside your onClick function would do it. You need to have a onClick function for the element being clicked.. — Trevor
– Trevor, Commented Sep 27, 2013 at 22:26
Which browser did you use? This is the same code but with alert() and you can click anywere, please try jsfiddle.net/Bum6L/2/show — Sergio
– Sergio, Commented Sep 27, 2013 at 22:40

Sergio · Accepted Answer · 2013-09-27 22:38:36Z

1

You can't click on variables, you can add event/click listeners on elements. Since you don't refer any element I assume window on my example and attach a click event listener on it that runs a function were the click variable is added +1.

Try this:

var click = 0; 
window.onclick=function(){click ++;}

Demo here

edited Sep 27, 2013 at 22:38

answered Sep 27, 2013 at 22:26

Sergio

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3 Comments

Sergio Over a year ago

@user2825148, in jsfiddle you need to click inside the window on the right-left. I tried it before posting.

Sergio Over a year ago

@user2825148, here is the same but with alert(), just click anywere - jsfiddle.net/Bum6L/2/show

user2825148 Over a year ago

Thanks guys this has helped me to progress a bit especially your jsfiddle link.

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