I have a simple button that calls a function inside index.html, and the function itself is in script.js, the function works when not using $( document ).ready(function() { //...}); but as soon as I add this line (at script.js), it won't work. This is how it looks:
index.html:
<button onclick="myFunction()">Click</button>
script.js with $( document ).ready: (Not working)
$( document ).ready(function() {
function myFunction(){
alert("Alright!");
}
});
script.js without $( document ).ready: (Working)
function myFunction(){
alert("Alright!");
}
Jquery solves this problem using selectors and binding events
In this cas use $('button').click(); to listen when the button is clicked.
Remove inline onclick
Hope this helps :>
$( document ).ready(function() {
$('button').click( () => alert("Alright!"));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button>Click</button>
You must have to add a library of JavaScript called jQuery. Because you are using the syntax of jQuery. (A rich and powerful JavaScript Library)
in Vanilla JavaScript we use document.getElementById('btnSubmit')
But in jQuery we write $('#btnSubmit') to do the same thing.
That's why you need to use the jQuery Library. You can use it directly form cdn or you can download it offline.
If you want to use cdn just add this
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/core.js"></script>
One more thing in jQuery we use
$(document).ready(function(){
//your code goes here
})
to make sure that the Script will be effective after the DOM parsing/rendering is completed.
Thank you.
Another option is that u can create a variable outside of the document.ready scope. Probably, not your best option, but will get job done.
var func;
$(document).ready(function(){
func= function()
{
alert('Alright!');
}
});
<button onclick="func()">Click</button>
The scope of the anonymous function in$( document ).ready() no longer available when the execution of the function is finished . So can't call the function from this scope.
That happen because when the HTML is loaded onClick attribute is readed but this function is still not loaded.
The best approach in this case is make the binding on ready event.
Related
I have a conflict with my javascript which is causing elements not to fadein. I have a button set to fadein after 10 seconds which works fine when I remove my javascript that I'm using for something else.
Can anyone help me figure out what the conflict might be?
You can see the test page I'm working on here: https://training.handcraftedbusinessfilms.com/test-fade-in/
I've currently removed the javascript that is causing the conflict but you can see it below.
<script type="text/javascript">
// Custom code by James
jQuery( document ).ready( function ( jQuery ) {
// binds to the plugin's function
jQuery( "input[name='gform_payment_method']" ).on( 'click', gfpStripeToggleCreditCard() );
// triggers the change to default option
jQuery( "input[id^=gform_payment_method_card_]" ).click();
console.log("Hello James");
});
</script>
Bro, your script is correct, but I see that you have 2 calls of "document.ready" in different parts of the html, so just need use once. I have merged and tested the script in the "head" tag and it works:
<script>
$(document).ready(function() {
$("div.button").fadeIn(2000);
//By James
//binds to the plugin's function
jQuery( "input[name='gform_payment_method']" ).on( 'click', gfpStripeToggleCreditCard );
//triggers the change to default option
jQuery( "input[id^=gform_payment_method_card_]" ).click();
console.log("Hello James");
});
</script>
The jquery was being called before it was defined in the header b/c the scripts were injected into the header via the theme and we couldn't control exactly the order of the scripts.
The solution was to create a site specific plugin that set a function to hold off on calling any jquery before the jquery was defined.
I have the following code:
function example(){
executing_code;
$(function(){
executing_code;
});
(function(){
executing_code;
})();
};
I know, that the third one is a self-invoking function and I know the meaning of the second too, but the third isn't invoking, when I invoke example()...
Some days earlier it was the other way round and the second didn't worked. I'm confussed.
Now I hope somebody can help me.
$(function() {
is equivalent to
$( document ).ready(function() {
query api here
Meaning it will fire the code inside the $(function() { when the page has finished loading
You need to close the example() before the $(function() { then call it inside.
$( document ).ready(function() {
// Handler for .ready() called.
});
Which is equivalent to calling:
$(function() {
// Handler for .ready() called.
});`
from https://api.jquery.com/ready/
This Handler is fired, when your page is fully loaded. You need this, when you place a script on top of you html page. The jquery selector don't find an id or a class or a tag when this element isn't loaded yet. So your script in the $(document).ready(function(){}); will be executed after every html element is loaded.
I'm having a hard time with overriding a core jQuerymobile function.
Here's the link to JQM library Im using: http://code.jquery.com/mobile/1.1.0/jquery.mobile-1.1.0.js
I changed line 5873
.appendTo( wrapper )
to following code:
.appendTo( *My own code* )
But I'm aware that changing the code directly inside JQM library isnt the best way to achieve what I need. So I would like to make an override in a custom js file.
How would I do it, in order to override the least of the JQM lib code? Thanks in advance.
That code is found within a delegated event handler, so you could overwrite that event handler with your own from an external file.
Lines 5788 to 5884 (with most of the code redacted):
$( document ).delegate( ":jqmData(role='listview')", "listviewcreate", function() {
...
.appendTo( wrapper )
...
});
So in your external JS code you can remove this event handler and attach your own:
$(document).undelegate(":jqmData(role='listview')", "listviewcreate").delegate(":jqmData(role='listview')", "listviewcreate", function () {
//your version of the above code here
});
Note that .delegate() and .undelegate() should be replaced with .on()/.off() if you're using jQuery 1.7 or newer.
Try this code after jquery initialized
jQuery.fn.extend({append: function() { **Your code here** } });
Just include a custom JavaScript file after you load jQuery, but before you bring in jQuery mobile.
<script src="jquery.js"></script>
<script src="custom-scripting.js"></script>
<script src="jquery-mobile.js"></script>
I'm using some embed codes that insert HTML to the page dynamically and since I have to modify that dynamically inserted HTML, I want a jquery function to wait until the page has loaded, I tried delay but it doesnt seem to work.
So for example, the dynamically inserted HTMl has an element div#abc
and I have this jquery:
if ( $('#abc')[0] ) {
alert("yes");
}
the alert doesn't show up.
I'd appreciate any help
Thanks
$(window).load(function () {
....
});
If you have to wait for an iframe (and don't care about the assets, just the DOM) - try this:
$(document).ready(function() {
$('iframe').load(function() {
// do something
});
});
That is the purpose of jQuery's .ready() event:
$(document).ready(function() {
if ( $('#abc').length ) //If checking if the element exists, use .length
alert("yes");
});
Description: Specify a function to execute when the DOM is fully
loaded.
Using the jQuery.ready should be enough. Try this
$(document).ready(function(){
//your code here
});
or
$(function(){
});
which is a shortcut of the first.
The load() method was deprecated in jQuery version 1.8 and removed in version 3.0.
So you have to use -
$(window).on('load', function() {
// code here
});
Try this:
$(document).ready(function () {
if ( $('#abc')[0] ) {
alert("yes");
}
});
$(window).load(function () { ... }
can be enough but otherwise your embeded code (what ever that can be) might provide some callback functionality that you can make use of.
delay() should only be used to delay animations.
Generally, to handle my JQuery before or after page loads, will use:
jQuery(function($){
// use jQuery code here with $ formatting
// executes BEFORE page finishes loading
});
jQuery(document).ready(function($){
// use jQuery code here with $ formatting
// executes AFTER page finishes loading
});
Make sue you bind the event with dom load so it's there when trigger called.
This is how you do it. Hope this helps someone someday
$(window).bind("load", function() {
//enter code here
$("#dropdow-id").trigger('change');
});`
I normally set up my javascript code to have a function. But due to the fact that the application generates most of the HTML and javascript calls from a VB6 application I would like to create a jQuery function that is more like a listener. So for example if I have a td tag that has the class 'gridheader1' I would like the jQuery to wait for it to be clicked.
I'm assuming that I would use the bind... But I'm getting javascript errors with it... If you can offer suggestions on where my code is wrong that would be great.
$('.gridheader1').bind('click', function()
{
alert('hi I got clicked');
});
Again this just has to sit out there on the main .js file. It isn't attached to any functions. Please let me know.
Thanks
you want
$('.gridheader1').bind('click', function(){
alert('hi I got clicked');
});
note the dot at the start of selector - it means class
// static tags
$(function(){ // DOM ready
$('.gridheader1').click(function()
{
alert('gridheader1 clicked');
});
});
// or if the tag is loaded via ajax use 'live'...
$(function(){ // DOM Ready
$('.gridheader1').live('click', function()
{
alert('gridheader1 clicked');
});
});
// or if you already have a function defined that you want to call, you can pass in the function instead of using an anonymous function.
function alertAboutStuff(){
alert('gridheader1 clicked');
}
$(function(){
$('.gridheader1').click(alertAboutStuff);
// $('.gridheader1').live('click', alertAboutStuff); // for tags loaded via ajax
});