I thought this is something easy to do but I dont find anything helping me out of this.
I have a function
(function($){
myFunction = function(e){
e.preventDefault();
// do stuff
// load ajax content
// animate and show
}
$('.button').on( 'click', myFunction);
})(jQuery);
now this works but I need to know, wait untill everything is done if someone presses many .buttons in a short time cause there are a few elements with class button
I've tried with promise()
$('.button').on( 'click', function(){
$.when( myFunction() ).done(function() {
alert('finished')
});
});
but that gives me an error e is undefined and
$('.button').on( 'click', myFunction).promise().done(function() {
alert('finisehd');
});
anyone knowing what I'm doing wrong and how I could do it to get it to work?
The most common solution would be to set a variable inside the click handler when myFunction is called and check its state with every call of the click handler.
This could be done somewhere along the lines of this:
(function($){
var wait = false;
myFunction = function(e){
e.preventDefault();
if (wait) {
return;
}
wait = true;
// ...
wait = false;
}
$('.button').on( 'click', myFunction);
})(jQuery);
Your function myFunction expects one argument, when you call myFunction() the argument is missing.
Not tested but it should works:
$('.button').on( 'click', function(e){
$.when( myFunction(e) ).done(function() {
alert('finished')
});
});
In addition to not passing in the e variable. You're using $.when incorrectly.
If you want to have the done function called after myFunction finishes its ajax call. You'll need to return a promise from myFunction.
function myFunction(e) {
return $.Deferred(function(deferred) {
doAjax(function(content) { // callback
deferred.resolve(content);
});
});
}
Now when you do
// inside event handler
$.when(myFunction(e)).done(function(content) {
// whoo!
});
Related
Please check out my diagram, and the pseudo-code below. I'm trying to figure out how to pass a function between two event listeners.
Basically, I want to execute some code if "Availability" is less than 0, OR when a user clicks "confirm" in a bootstrap dialog. If the Availability is greater than 0, you'll get the special bootstrap dialog.
I'm trying to avoid writing the same code twice. I'm also trying to avoid using trigger $("#btnConfirm").trigger("click", fn1); --- my assumption is that there is a sexier way, like a callback, or something...
So.... how do I get the code I want to execute into the other 'button click' event listener --OR-- how do I return "btnConfirm" back to the event listener that called the dialog?
$("#Select").on("change", function(e) {
fn1 = function() {
//stuff I want to do
};
//a check that must be passed
currAvail = $("#Availability").val();
if (currAvail > 0) {
//show a message, "Are you sure you want to make the thing?"
//if YES, execute fn1()
//fn1() needs to be available to btnConfirm click listener
// use trigger("click", fn1) ????
} else {
//execute the code
fn1();
};
});
$("#btnConfirm").on("click", function(e, param1) {
//Ok, well, they said YES...
//so I need to execute fn1();
});
Since the requirement is to call fn1() in both cases, you can separate the logic out into a method and call when it is needed
function fn1() {
//code to execute on no goes here
}
$("#Select").on("change", function(e) {
let currAvail = $("#Availability").val();
if (currAvail > 0) {
//show modal window
} else {
//execute the code
fn1();
};
});
$("#btnConfirm").on("click", function(e, param1) {
fn1()
});
Why not just move the function definition to outside the change callback?
$("#Select").on("change", function(e) {
//a check that must be passed
currAvail = $("#Availability").val();
if (currAvail > 0) {
//show a message, "Are you sure you want to make the thing?"
//if YES, execute fn1()
//fn1() needs to be available to btnConfirm click listener
// use trigger("click", fn1) ????
} else {
//execute the code
fn1();
};
});
$("#btnConfirm").on("click", function(e, param1) {
//Ok, well, they said YES...
//so I need to execute fn1();
});
// Function move to here.
function fn1() {
//stuff I want to do
};
The following is my code:
$.win.addEventListener('click', function(e) {
$.txtAbout.blur();
});
Event handler is called if someone clicks on the parent div/window, invoking the method. I would like to amend the code, so this happens:
$.win.addEventListener('click', function(e) {
$.txtAbout.blur();
//do something else if the above function is successfully called
//code....
});
I am not sure what is the best way to do this? Is wrapping the above method call in another function then calling in the event handler with a boolean value the way to do it?
function test(){
$.txtAbout.blur();
return true;
}
$.win.addEventListener('click', function(e) {
var check = test();
if(check==true)
{
//do something else if the above function is successfully called
//code....
}
});
I have a block of code like so:
function doSomething() {
someVar.on("event_name", function() {
$('#elementId').click(function(e) {
doSomething();
});
});
}
// and on document ready
$(function () {
$('#anotherElemId').click(function () {
doSomething();
});
});
The problem that I'm encountering is that when I call doSomething() from anotherElemId click event(that is binded on document ready) it works as expected, but calling it recursively from elementId click doesn't work.
Any ideas? Thinking is something trivial that I'm missing.
Is someVar an actual jQuery reference to a dom element? (e.g. $('#someitem'))
The second problem is you cant put a .click event inside a function that you would like to instantiate later on. If you are trying to only allow #elementId to have a click event AFTER some previous event, try testing if a tester variable is true:
var activated = false;
$(function () {
$('#anotherElemId').click(function () {
activated = true;
});
$('#secondElemId').on("event_name", function() {
if (activated) {
// code that happens only after #anotherElemId was clicked.
}
});
});
I have some code in the - $(document).ready(function(){ - that shuffles stuff around, the code is fired when the page is loaded but what I want to do is add a button so this function runs every time I press the button, how could I achieve this, thanks??
function shuffleStuffAround() {
// truffle shuffle
}
$(function($) { // DOM ready
shuffleStuffAround();
$("#some-button").click(function() {
shuffleStuffAround();
return false; // you probably want this
});
});
You can save you "shuffle stuff around" code as a function and call it from other parts of your codebase.
var foo = function() {
// code that shuffles stuff around
};
$(document).ready(function() {
foo();
// other stuff
});
$('#mybutton').click(foo);
//or
$('#mybutton').click(function() {
foo();
// other stuff.
});
You could simple refactor the code that you run on the ready function into its own function and call that in your button's click event:
$(document).ready(function(){
codeToRun();
$('.button').click(function(){codeToRun()});
});
function codeToRun(){
// do work
}
I've written this code for a friend. The idea is he can add a "default" class to his textboxes, so that the default value will be grayed out, and then when he clicks it, it'll disappear, the text will return to its normal color, and then clicking a second time won't clear it:
$(document).ready(function() {
var textbox_click_handler = function clear_textbox() {
$(this).removeClass('default');
$(this).attr('value', '');
$(this).unbind(textbox_click_handler);
};
$(".default").mouseup(textbox_click_handler);
});
The clicking-to-clear works, but I get the following error:
Uncaught TypeError: Object function clear_textbox() { ... } has no method 'split'
what is causing this? How can I fix it? I would just add an anonymous function in the mouseup event, but I'm not sure how I would then unbind it -- I could just unbind everything, but I don't know if he'll want to add more functionality to it (probably not, but hey, he might want a little popup message to appear when certain textboxes are clicked, or something).
How can I fix it? What is the 'split' method for? I'm guessing it has to do with the unbind function, since the clearing works, but clicking a second time still clears it.
You can do it like this:
var textbox_click_handler = function(e) {
$(this).removeClass('default')
.attr('value', '')
.unbind(e.type, arguments.callee);
};
$(function() {
$(".default").mouseup(textbox_click_handler);
});
Or use the .one function instead that automatically unbinds the event:
$(function() {
$(".default").one('mouseup', function() {
$(this).removeClass('default').attr('value', '');
});
});
The unbind needs an event handler while you are specifying a function to its argument thereby giving you the error.
I am not sure if this is really different but try assigning the function to a variable:
var c = function clear_textbox() {
$(this).removeClass('default');
$(this).attr('value', '');
$(this).unbind('mouseup');
}
and then:
$(".default").mouseup(function(){
c();
});
if you don't want to completely unbind mouseup, check for the current state using hasClass(). No need to unbind anything.
$(document).ready(function() {
$('.default').bind('mouseup', function(e) {
var tb = $(this);
if(tb.hasClass('default')) {
tb.removeClass('default').val('');
}
});
});
Make sure you are unbinding mouseup:
function clear_textbox() {
$(this).removeClass('default');
$(this).attr('value', '');
$(this).unbind('mouseup');
}
$(function() {
$('.default').mouseup(clear_textbox);
});
Also I would write this as a plugin form:
(function($) {
$.fn.watermark = function(settings) {
this.each(function() {
$(this).css('color', 'gray');
$(this).mouseup(function() {
var $this = $(this);
$this.attr('value', '');
$this.unbind('mouseup');
});
});
return this;
};
})(jQuery);
so that your friend can simply:
$(function() {
$('.someClassYourFriendUses').watermark();
});