How to append to window.onload?

Question

I have a function, foo, that I would like to add to window.onload however my problem is that there is already another function, bar, set to window.onload. How can I get both functions attached. I have no access to change the logic of how bar is added to window.onload therefore I can’t use the paradigm addEvent(…) . Would something like the following work in all cases?

<script>
$(window).load(foo(){
//my code here
});
</script>

//lots of html
//potentially this happens before or after my above script

<script>
window.onload = bar();
otherFunction(){
//other function code here
};
</script>

Answer 1

This is a non-issue since you're using jQuery. You can call $(window).load(...) multiple times and it won't stomp out previously-bound event handlers.

This function takes an anonymous function as a parameter, which is executed once the load event is fired. e.g.

$(window).load(function() {alert('the window has loaded');});

JQuery Documentation of the .load() handler: https://api.jquery.com/load-event.

For reference, the equivalent "vanilla" JS would be to use window.addEventListener.

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Update

Instead of the .load event, use .on('load,':

$(window).on('load', function() { alert('This is better'); });

See https://stackoverflow.com/a/37915907/361842 for more.