I have 2 questions
I am using the hashchange plugin .... so I want to know would a function as below, be called everytime a hashchange occurs... because I have something like that in my code and the code function apparently doesnt seems to be called
$(document).ready(function()
{
// function here
});
On the other have if I remove the hashchange as in If i make http://abc.com/a.htm#http://abc.com/b.htm as http://abc.com/b.htm
the code works fine
the problem is the structure of my pages is a bit different .... here is the fiddle with the page structure that explains on a higher level what I am trying to achieve jsfiddle.net/vBKWd/9 ... on hash change jus the div c on my page 1 gets replaced by page 2 and vice versa .... and the js function that I have shown below is getting called only once and not after hashchange
Or is therre any way I can bind the function with the div so that whenever the div is replace the function get called?
No, a ready handler is only called on document ready, not on hash change. You should use the hashchange event for that, instead:
$(window).hashchange(function () {
// function here
});
Sample: http://jsfiddle.net/vBKWd/2/
In document ready wirte code below
$(window).bind('hashchange', function () {
//code here
});
use live in this case
$(document).ready(function()
{
$(selector).live(hashchange, function(){
// your code goes here
});
});
Related
im trying to get a lil project going but im stuck on a very annoying thing.
$(document).ready(function() {
$("#search-button").click(console.log('hello'))
});
as you can see im targeting a search button with the id search-button and as soon as i click it something should happen. in this case i put a console.log in to test if it works but it doesn't. it always logs it as soon as i load the page , not when i click the button i target. ... what am i doing wrong
if you need more info on this pls tell me i tried to keep it as simple as i could
ty for your help
O.k
The click handler needs a function argument, not just the console.log by itself. Try this:
$(document).ready(function() {
$("#search-button").click(function() {
console.log('hello');
});
});
Inside of .click should be a handler .click(handler) and the handler should be a function. The browser is reading the code and when it hits console.log('hello'), it does it! It's seeing .click etc, but it doesn't matter; it next sees console.log and does it.
Try
$(document).ready(function() {
$("#search-button").click(function() {
console.log('hello');
});
});
As others have mentioned, the click function requires its own callback function. You can also use this, without requiring the use of document:
$("#search-button").on('click', function() {
console.log('hello')
})
I hope You're using jQuery version 3 or up. if you use 3 or up jquery version the good practice is you use Document binding Example:
jQuery(document).on('click', '#search-button', function(event) {
//your Code here...
console.log('hello');
});
How can I make jQuery run when my webpage has finished loading?
This is not what I want. All that this does is wait for the page to finish loading before any Javascript CAN be run.
$(document).ready(function(){
//Code here
});
What I want is for this to run when the page loads. I don't want it to wait for 'click' or 'change'. Can I add a 'load' or something to this?
$(document).on("change", "#input", function(e) {
$("#output").val($(this).val());
});
A workaround I have been using is to use jQuery to "change" the selected option on a select box, thereby triggering the code I actually want to run.
I have seen a bunch of questions like this, but every time the answer just says to use $(document).ready(function(){//Code}); which is not what I'm looking for.
Any ideas?
EDIT: Here is a better example of what I'm looking for.
This code below will run when the element with the id of 'input' is clicked. That is the only time it will run. I would like for it to run as soon as it is ready - as soon as $(document).ready(function(){}); can run it.
$(document).ready(function(){
$(document).on("change", "#input", function(e) {
$("#output").val($(this).val());
});
});
I think that this would work, but I was hoping for a nicer solution and one that doesn't require me to rewrite everything as functions.
$(document).ready(function(){
function runWhenReady(){
$("#output").val($(#input).val());
}
$(document).on("change", "#input", function(e) {
runWhenReady();
});
runWhenReady();
});
I think that this will run runWhenReady() when #input is clicked, and when the page finishes loading. My question is, is there a simpler way to do this?
I think the only way to do what I want is to name the function and call it two different ways.
$(document).ready(function(){
function xyzzy(){
$("#output").val($(#input).val());
}
//Call the function when #input is clicked
$(document).on("change", "#input", function(e) {
xyzzy();
});
//Call the function when the page loads
xyzzy();
});
This will call the function when the page has finished loading, as well whenever #input is clicked.
I think you're looking for $(window).load()
$(window).load(function(e){
// code here
});
Answer to your question in the comments:
$(document).on('click', '#input', function(e){
$('#output').val($(this).val());
});
Can I add a 'load' or something to this?
yes you can which will like $(window).on( "load", handler )
Also there is not much difference between the above code and
$( window).load(function() {
// Handler for .load() called.
});
The first method is just short cut of the second one
$(document).ready happens when all the elements are present in the DOM, but not necessarily all content.
$(document).ready(function() {
alert("document is ready");
});
window.onload vs document.onload
window.onload or $(window).load()
happens after all the content resources (images, etc) have been loaded.
$(window).load(function() {
alert("window is loaded");
});
From your Example:
$(document).ready(function(){
function runWhenReady(){
$("#output").val($(#input).val());
}
$(document).on("change", "#input", function(e) {
runWhenReady();
});
runWhenReady();
});
You could write:
$("#input").on("change", function() {...});
which defines a handler for your input. Everytime you change the value in the input it will call the function passed as argument. That make the whole $(document)... unneccessary.
If you want to run the function just once, as soon as possible wrap it in a IIFE like:
(function(){...});
Here is a pretty good blog post about IIFE:
http://benalman.com/news/2010/11/immediately-invoked-function-expression/
I have a simple div in one of my views that I want to click to hide another element on the page. I put this in my application.js But it doesn't do anything. Did I put it in the wrong place?
function toggleNewPostForm {
$('.new-post-btn').hide();
}
Use document ready to make sure document is loaded before selecting an element from HTML and call your function inside
function toggleNewPostForm(){
$('.new-post-btn').hide();
};
$( document ).ready(function() {
toggleNewPostForm();
});
Try something like this
<div class="xyz">Click here!</div>
in javascript
$(".xyz").click(function(){
$('.new-post-btn').hide();
});
Also check if event listener is added after document ready method? i.e
$(function(){
$(".xyz").click(function(){
$('.new-post-btn').hide();
});
});
If this is the only js you have, there will be no click-behaviour. You have to tell the element, that is has to react to a click-event.
Try this in your application.js-file:
function toggleNewPostForm() {
$('.new-post-btn').hide();
}
$(document).on('ready page:load', function(){
$('.new-post-btn').on('click', function(){
toggleNewPostForm();
});
});
P.S.: As RGraham points out, you have to write the parameter-paranthesis if you define a function.
P.P.S.: In ruby on rails, you should check against 'ready' and 'page:load' as document-ready-handlers, because Ruby on Rails uses the "Turbolinks"-library by default.
Right, I'm getting quite aggitated with this. I'm probably doing something wrong, but here's what I'm doing:
$(document).ready(function () {
$('#somebutton').click(function () {
openPage1();
});
$('#someotherbutton').click(function () {
openPage2();
});
});
var openPage1 = function () {
$('#iframe').attr('src', 'someurl');
$('#iframe').load(function () {
$('#button').click();
});
};
var openPage2 = function () {
$('#iframe').attr('src', 'anotherurl');
$('#iframe').load(function () {
$('#anotherbutton').click();
});
}
Whenever I click somebutton everything goes as expected. However when I click someotherbutton. The .load() from openPage1() is called first and I can't find a way to stop that. The .load() from openPage1() has a button with the same name, however on openPage2() I need to modify the contents before clicking the buttons.
I need to use .load() because I can't click the buttons before the document is ready.
Basically what I need is two seperate .load() instances on the same iframe, that don't fire off on each other.
Besides that, maybe my understanding of jQuery/JS is wrong, but shouldn't the .load() events only be listening after clicking the corresponding button?
Can someone help me out, this has been keeping me busy all afternoon.
Try using on, and once loaded, unbind
$("#iframe").on("load", function(){
$(this).off("load");
$('#button').click();
});
That way you remove the handler you put up before the second button is clicked?
By writing : $('#iframe').load(function (){ $('#button').click(); });, you are adding a listener on the load event, which will stay and be re-executed on each subsequent reload of the iframe.
Here is a jsfiddle to demonstrate this : click on the "reload" button, and see how many times the "loaded" message appears in your console.
in your case, if you click on #somebutton, then on #someotherbutton, after the second click, you will have two handlers bound on the load event, and both will be triggered.
If you click 5 times on #somebutton, you should end up calling 5 times $('#button').click().
If you want to execute it once, you can follow Fred's suggestion, or use jQuery .one() binder :
$('#iframe').one('load', function(){ $('#button').click() });
Here is the updated jsfiddle : 'loaded' should be displayed only once per click.
Maybe try and replace the lines in both functions like this:
$('#iframe').load(function() {
$('#anotherbutton').click();
};
$('#iframe').attr('src', 'anotherurl');
Otherwise it might be firing the event before the new event-handler has been set.
This isn't really an answer to your problem Now it is an answer, but I think utilizing functions as they were intended could be beneficial here, i.e.:
//Utilize a single function that takes arguments
var openPage = function (frame, src, eventEl) {
frame.attr('src', src); // If you pass frame as a jQuery object, you don't
frame.on("load", function(){ // need to do it again
$(this).off("load");
evEl.click(); //Same for your buttons
});
}
//Simplify other code
$(document).ready(function () {
$('#somebutton').click(function () {
openPage($("#iframe"),somehref,$("#buttonelement"));
});
$('#someotherbutton').click(function () {
openPage($("#iframe"),anotherhref,$("#someotherbuttonelement"));
});
});
So im trying do disable links on some <li> ellements that have been loaded in from another page using an .load() function, but for some reason i'm not able to effect those list items.
var from_post = false;
$(document).ready(function() {
//so this is the function that loads in data from another page
$("#gallery").load('http://localhost/index.php/site/gallerys_avalible/ #gallerys_avalible'), function() {
console.log('hello');
// sense there are no other li elliments on the page i thought this
// would be okay. but this function never gets called, i've moved it
// all over i just recently attached it to the load function thinking
// that maybe if the load was not complete it would not run, but i
// have had no luck.
$('li').click(function (e) {
e.preventDefault();
console.log("I have been clicked!");
return false;
});
};
$('#addNew').click(function () {
console.log('i got called');
$('#new_form').fadeIn(1000);
});
$('form').submit(function() {
if(from_post) {
//submit form
return true;
} else {
//dont submit form.
return false;
}
});
any help would be greatly appreciated, oh and the other thing is that i can run this function through firebug, and it works 100% fine. so im stumped.
You are closing your call to .load() too early. You have:
$("#gallery").load('http://...'), function() {
That just calls load and then declares a function. But, that function is not bound to the success handler and it will never be executed. You need the ) to be on the other side of the function declaration so that the function is included as a parameter to your call to load:
$("#gallery").load('http://...', function() {
...
});
Fix that and your code works: http://jsfiddle.net/gilly3/WdqDY/
Try a future-proof event observer like live or delegate:
$('li').live('click', function(){})
or, this method is preferred if you know the parent:
$('#gallery').delegate('li','click',function(){})
The reason for needing this is your click events are being bound to elements that are on the page at the time of the binding. Any li's added later will not see that binding which is how live or delegate works. They bind to the parent and traverse the child nodes every (click in this case) event to see if the event applies to an existing child.
Use .live('click', ...) or .delegate() instead of .click(...).