I want to call a callback function after a called a function that dynamically calls a function. I am either wording it wrong or it is complicated. I am not sure. But here is the relevant code.
confirm_delete(delete_resource,$resource_id, function(){
if ($confirm_delete === 1) {
$(this).parent().parent().hide();
$(this).parent().parent().prev().hide();
}
});
The following is what it looked like without the attempted callback
confirm_delete(delete_resource,$resource_id);
I'm assuming that you are looking for something like this:
function confirm_delete(delete_resource, $resource_id, cb) {
var $confirm_delete = confirm('Are you sure');
if ($confirm_delete) {
$(this).parent().parent().hide();
$(this).parent().parent().prev().hide();
// call callback fn
cb();
}
}
confirm_delete(1, 1, function(){
console.log('im callback fn');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
Related
<div id='example' data-fn='functiona'>OK</div>
$('#button').click function(){
$('#example').attr('data-fn', functionb');
});
function functiona(){
console.log('functiona');
}
function functionb(){
console.log('functionb');
}
$('#example').click(function(){
// execute function currently stored inside data-fn attribute
});
Probably everything is clear.
I need dinamically change the function which will be executed by clicking on example.
The current function should be stored inside data-fn.
Any help?
What you want to do is described in Can you set a javascript function name as an html attribute?
But I suggest that you solve it that way:
$('#button').click(function() {
$('#example').off('click.myNamespace') // remove the previously assigned callback
.on('click.myNamespace', creatClickCallback(functionb)); // register the new callback
});
function functiona() {
console.log('functiona');
}
function functionb() {
console.log('functionb');
}
function creatClickCallback(functionToCall) {
return function(evt) {
functionToCall()
}
}
$('#example').on('click.myNamespace', creatClickCallback(functiona));
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id='example'>OK</div>
<div id='button'>button</div>
This way you ensure that you do not accitantily name a function the wrong way, because you pass it as an actual reference to that function instead of a string.
Couldn't you just store the function name, then when you click you check which function is then call it and update the function to which one you want?
Something like this:
function functiona(){
console.log('called functiona');
document.body.style.background = '#aaa';
}
function functionb(){
console.log('called functionb');
document.body.style.background = '#fff';
}
$('#example').on("click", function(ev){
var func = $(ev.target).attr('data-fn');
console.log(func);
window[func]();
});
$('#changer').on("click", function(ev){
//HERE you can change the function will be called based on what you want
//Here I just changed it with a simple if...
var fn = $("#example").attr("data-fn");
if (fn == 'functiona'){
$("#example").attr("data-fn", "functionb");
}else {
$("#example").attr("data-fn", "functiona");
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id='example' data-fn='functiona'>Click Me to call function</div>
<button id='changer'>Change Function</button>
Here, the global variable window have your functions stored, so going through it by it's name and calling it, should work, if this name exist as a function window[stringOfFuncionName]();
This is not the best way of doing what you need (actually you didn't let completely clear your final objective), but this maybe can help.
I'm getting a 'navigateTo is not defined' error in my JS with the following. I'm pretty sure I have passed the function navigateTo as a parameter to the openCart() function so unsure where I'm going wrong?
$(function() {
var form = $('form#checkout-form'),
$sections = $('[data-step]');
function navigateTo(index) {
$sections.removeClass('is--active').eq(index).addClass('is--active');
}
});
$(document).on('click', 'nav.main a.cart', function(e) {
openCart();
});
function openCart(navigateTo) {
navigateTo(1);
disableScroll = false;
}
your function openCart should go to inside the dom ready function otherwise it doesn't call the function and another thing you need to pass the callback as parameter navigateTo into the opencart function like openCart(navigateTo);
$(function() {
var form = $('form#checkout-form'),
$sections = $('[data-step]');
function navigateTo(index) {
alert(2);
$sections.removeClass('is--active').eq(index).addClass('is--active');
}
$(document).on('click', 'div', function(e) {
openCart(navigateTo);
});
function openCart(navigateTo) {
navigateTo(1);
disableScroll = false;
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>hahah</div>
It's a scope issue. Wrap your whole script in a closure and you'll be fine;
(function($) {
// your script here
})(jQuery)
But get rid of the $(function() { } around the first block as well.
I have a code like this:
function myfunc () {
alert('executed');
}
$('.classname').on('click' function () {
myfunc();
});
I want to run myfunc once. I mean I don't want to execute it every time when user clicks on .classname element. I guess I need to warp function-calling into a condition. Something like this:
if ( /* that function never executed so far */ ) {
myfunc();
}
How can I do that?
The simplest way with jQuery is to use .one
function myfunc() {
alert('executed');
}
$('.classname').one('click', function() {
myfunc();
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button class="classname">click here!</button>
You should remove the event listener in the function you're calling:
function myfunc () {
alert('executed');
$('.classname').off('click', myfunc);
}
$('.classname').on('click', myfunc);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class='classname'>Click Me</div>
Don't set a global variable like the other posts describe - there's no need for that and then you're still doing an unnecessary function call. This ensures the function is never called again and the event isn't being listed for.
$( document ).ready(function() {
var hasBeenExecuted = false;
function myfunc () {
alert('executed');
hasBeenExecuted = true;
}
$('.classname').on('click' function () {
if(!hasBeenExecuted){
myfunc();
}
});
});
var functionWasRun = false;
function myfunc () {
functionWasRun = true;
alert('executed');
}
$(document).ready(function() {
$('.classname').on('click', function () {
if (!functionWasRun) {
myfunc();
}
});
});
I would suggest, as an alternative to a global variable, assigning a property to the function.
function myfunc () {
alert('executed');
myfunc.executed = true;
}
$('.classname').on('click', function () {
if(!myfunc.executed) {
myfunc();
}
});
This has the advantage of working the same way while not polluting the global scope unnecessarily. However, if skyline3000's answer works for you, you should use that instead as it's cleaner and more sensible overall.
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 want to call a function with a namespace based on its name.
Perhaps some background: What I want is, dynamically bind pages via $.mobile.loadPage(inStrUrl, { showLoadMsg: false }); and then, based on the current page, invoke a function within a loaded page. For example: each page has a showFilter function, the Event is attached to a main.html - page which should call the matching function in the current page.
I also tried some solutions, with jquery too, but nothing works for me.
This is my function code:
function namespace() { }
namespace.showFilter = function () {
alert("Test");
}
And want to "invoke" or "call" it via its name.
This is what i tried at least.
$(document).ready(function() {
var fn = window["namespace.showFilter"];
fn();
});
I get error TypeError: fn is not a function
Here is a fiddle http://jsfiddle.net/xBCes/1/
You can call it in the following way:
$(document).ready(function() {
window["namespace"]["showFilter"]();
});
or
$(document).ready(function() {
window["namespace"].showFilter();
});
or
$(document).ready(function() {
window.namespace.showFilter();
});
I found that I had to manually set it to window.
window.namespace = function() { }
window.namespace.showFilter = function () {
alert("Test");
};
$(document).ready(function() {
var fn = window["namespace"]["showFilter"];
fn();
});
http://jsfiddle.net/xBCes/4/
Like this:
$(function() {
window.namespace.showFilter();
});
P.S. I shortened the $(document).ready(...)
function namespace() {}
namespace.showFilter = function () {
alert("Test");
}
$(document).ready(function() {
var fn = namespace.showFilter();
fn();
});
http://jsfiddle.net/xBCes/3/