css - How can I add an "onclick" in an input tag? -


i trying insert 

onclick="countcheckboxes()"

within input tag. there way in css? tried following, didn't work:

input[type=checkbox]:after { content: "onclick="countcheckboxes()"";}

so output this

 <input type="checkbox" onclick="countcheckboxes()">

this wordpress form. maybe add in functions.php template enable me this?

you cannot generate javascript in css. please refer more information: using javascript in css

i guessing want keep markup clean of js? if so, best thing abstract js markup in separate js file. there can navigate dom , append functions whichever way require. can either vanilla javascript or js framework(like jquery) simplifes process lot.

i'm happy set demo if wish learn how.


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