HTML & JS
How do I call 2 functions from one onclick event? Here's my code
<input id ="btn" type="button" value="click" onclick="pay() cls()"/>
the two functions being pay() and cls(). Thanks!
9 Answers
Add semi-colons ; to the end of the function calls in order for them both to work.
<input id="btn" type="button" value="click" onclick="pay(); cls();"/>
I don't believe the last one is required but hey, might as well add it in for good measure.
Here is a good reference from SitePoint http://reference.sitepoint.com/html/event-attributes/onclick
Comments
You can create a single function that calls both of those, and then use it in the event.
function myFunction(){
pay();
cls();
}
And then, for the button:
<input id="btn" type="button" value="click" onclick="myFunction();"/>
3 Comments
Muflix
it can be done, but seems to me it is not so transparent or it could be named similar to something like funtion1_function2(), in a case that funcitons are not related.
Am33d
won't it have more overhead than just doing onclick="pay(); cls();" ?
Geeky Guy
@Am33d an overload that translates as one cell in the stack and half a millisecond extra for processing. It is more than worth it for the gain in readability and easy of maintenance. Imagine that in the future you have to add three extra methods, with conditional logic.
You can call the functions from inside another function
<input id ="btn" type="button" value="click" onclick="todo()"/>
function todo(){
pay(); cls();
}
1 Comment
Geeky Guy
It's been more than a year since this answer, and only now I noticed we posted the same answer at almost the same time (but you beat me by a minute, so have my +1).
onclick="pay(); cls();"
however, if you're using a return statement in "pay" function the execution will stop and "cls" won't execute,
a workaround to this:
onclick="var temp = function1();function2(); return temp;"
Comments
Binding events from html is NOT recommended. This is recommended way:
document.getElementById('btn').addEventListener('click', function(){
pay();
cls();
});
Comments
With jQuery :
jQuery("#btn").on("click",function(event){
event.preventDefault();
pay();
cls();
});
Comments
Just to offer some variety, the comma operator can be used too but some might say "noooooo!", but it works:
<input type="button" onclick="one(), two(), three(), four()"/>
Comments
Try this
<input id ="btn" type="button" value="click" onclick="pay();cls()"/>
Comments
put a semicolon between the two functions as statement terminator.
Comments
pay(); cls()pay(); cls();