I'd like to create a callback on a simple function.
I have this function which is called on button click:
function main(){ };
So I'd like main(), when its done to call this:
function test(){ }
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3 Answers
function main(callback) {
// ... do your thing
callback();
}
main(function(){
alert('this is the callback speaking');
});
answered Dec 15, 2011 at 6:58
Michael Robinson
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1 Comment
Michael Robinson
@jQuerybeast: You pass your
test function as the callback parameter of main. Updated my answer with more detailsif the main() function not use ajax,you can use：
function main(callback) {
// ... do your thing
callback();
}
function test(){}
eg:
<input type="button" onclick="main(test);"/>
if the main() function use ajax,you can call test() in complete function like this:
function main(callback){
$.ajax({
...
complete: function(XMLHttpRequest, textStatus){
callback();
},
...
});
}
function test(){
...
}
eg:
<input type="button" onclick="main(test);" value="test"/>
2 Comments
jQuerybeast
Hi and thanks. I am not using ajax. On your first example, the API doesn't allow me to call main(test). Example: API.loadAndWait('snippet', '5', main); so if I replace the main with main(test) it doesnt compile
devnull69
In that case you would have to use something like
API.loadAndWait('snippet', '5', function() {main(test);});As i understood its simple,Sorry if i am not in the point.
function main() {
// ... do your thing
test();
}
function test() {
// ... do your thing in test
}
3 Comments
jQuerybeast
That's what I thought, but test is executed with the main
sampathpremarathna
So whats the deference?If you want to execute test after the main this is it.Or if you want to call test few minutes after main use setTimeout("test()",3000); .Then it will be called after 3000 milliseconds.
devnull69
Not when you only execute
test() after(!) you did whatever you have to do in main(). We don't know your code so we cannot guess where in your code you'll have to place the call to test(). Show us more code an we can help you