Hi, sorry for the basic question, but can someone explain to me some
basic event attachment process. Say I have a function,
dynamicallyCrea teElement(), that creates an element. I want that new
element to have an onclick that calls another function. So it looks
like this:
function dynamicallyCrea teElement() {
....
element.onclick = myFunction;
....
}
function myFunction() {
...
};
The problem is that myFunction will be called during the execution of
dynamicallyCrea teElement(), and not just the onclick for the element.
Instead, I have tod o this:
function dynamicallyCrea teElement() {
....
element.onclick = function() { myFunctions())_ ;;
....
}
Why does the first one automatically execute myFunction, and what
exactly does
element.onclick = function() do? 4 2024 sh*****@gmail.c om a écrit :
Hi, sorry for the basic question, but can someone explain to me some
basic event attachment process. Say I have a function,
dynamicallyCrea teElement(), that creates an element. I want that new
element to have an onclick that calls another function. So it looks
like this:
function dynamicallyCrea teElement() {
...
element.onclick = myFunction;
here you tell to execute the function
element.onclick = 'myFunction()'; // could work
}
function myFunction() {
};
The problem is that myFunction will be called during the execution of
dynamicallyCrea teElement(), and not just the onclick for the element.
Instead, I have tod o this:
function dynamicallyCrea teElement() {
...
element.onclick = function() { myFunctions())_ ;;
not exactly (see below)
}
Why does the first one automatically execute myFunction,
because that works like that
as it does if you do
window.onload = alarm;
function alarm() { alert('OK'); }
and what exactly does
element.onclick = function() do?
The last one, you assign an annonymous function that will call anothrer
one on element's event 'click'
element.onclick = function() { myFunction(); };
element.onclick = 'myFunction();' ;
is same as
<tag onclick="myFunc tion();">
myFunction() would have to be declared outside of the function
dynamicallyCrea teElement
--
sm
SAM meinte:
sh*****@gmail.c om a écrit :
>Hi, sorry for the basic question, but can someone explain to me some basic event attachment process. Say I have a function, dynamicallyCre ateElement(), that creates an element. I want that new element to have an onclick that calls another function. So it looks like this:
function dynamicallyCrea teElement() { ... element.onclic k = myFunction;
here you tell to execute the function
Err... What? A reference to a function is assigned to the onclick
property - nothing gets executed. element.onclick () would call the
function, or element.onclick = myFunction(); would assign the result of
myFunction to the onclick property.
element.onclick = 'myFunction()'; // could work
Yuck! And I doubt it "works" cross-browser.
>}
function myFunction() { };
The problem is that myFunction will be called during the execution of dynamicallyCre ateElement(), and not just the onclick for the element.
I doubt that. Could you provide a test case?
>Instead, I have tod o this:
function dynamicallyCrea teElement() { ... element.onclic k = function() { myFunctions())_ ;;
Wrap your function into another anonymous function I suppose - the
result should be the same. However, your "{ myFunctions())_ ;;" will only
result in a syntax error.
>Why does the first one automatically execute myFunction,
because that works like that
as it does if you do
window.onload = alarm;
This executes alarm when the load event fires. Not when you assign the
function, which seems to be the "problem" of the OP. I suppose he only
forgot some parantheses.
element.onclick = 'myFunction();' ;
is same as
<tag onclick="myFunc tion();">
No.
myFunction() would have to be declared outside of the function
dynamicallyCrea teElement
No.
Gregor
-- http://photo.gregorkofler.at ::: Landschafts- und Reisefotografie http://web.gregorkofler.com ::: meine JS-Spielwiese http://www.image2d.com ::: Bildagentur für den alpinen Raum
On Jul 24, 5:35*pm, shuc...@gmail.c om wrote:
Hi, sorry for the basic question, but can someone explain to me some
basic event attachment process. *Say I have a function,
dynamicallyCrea teElement(), that creates an element. *I want that new
element to have an onclick that calls another function. *So it looks
like this:
function dynamicallyCrea teElement() {
...
element.onclick = myFunction;
...
}
function myFunction() {
..
};
The problem is that myFunction will be called during the execution of
dynamicallyCrea teElement(), and not just the onclick for the element.
No it won't; you're confusing
element.onclick = myFunction;
and element.onclick = myFunction();
C.
On Jul 24, 6:10*pm, "C. (http://symcbean.blogsp ot.com/)"
<colin.mckin... @gmail.comwrote :
ot just the onclick for the element.
>
No it won't; you're confusing
element.onclick = myFunction;
and element.onclick = myFunction();
C.
I think I meant element.onclick = myFunction(this ); in my original
code, which definitely does execute myFunction().
After reading Peter-Paul Koch's page about the "this" keyword (http:// www.quirksmode.org/js/this.html) I got a much better understanding of
what I needed to do. I needed handler functions that would work for
both adding events using .onclick and inline.
Inline is handled by <span onclick="editHa ndler(this)"and
element.onclick = editHandler; handles adding the event in the table
row creation function. Inside editHandler, "this" is references the
span that I'm clicking on, which is what I really needed in the first
place. Thanks for all the responses. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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