I'm trying to add some validation to some form fields in a jQuery Mobile site I'm building with a PHP back end.
I've done this in the past successfully using the jquery.validate plugin but I'm having trouble getting this to work with jQuery Mobile.
The validation is working in this jsFiddle page:
http://jsfiddle.net/GeX5C/5/
but I'm having trouble getting it to fire when I click the submit button from the hosted PHP page. From what I've read I can't use the usual:
$(document).ready(function(){
approach but not sure what to replace this with?
Would really appreciate any assistance here.
Thanks
2 options, in the event document ready is not supported for whatever reason..
one try the load event on the window, which will wait til everything is loaded and completely rendered, similar to the ready function but waits just that much longer course im paraphrasing but hopefully you get the point.. its applied the same as the ready function.
$(window).load(function(){
// Your code here
});
second option is dont use any load/ready. just make a function that fires off as the final line of your code, should whatever your doing truely not require the page to actually be fully rendered to run. logic to this is make a function then in the last lines call the function.
also try to keep a mass majority of your javascript especially pieces that require other things to load first at the bottom of your page just above the final body tag. Yea theres hot debate over this some people insist top is better while others insist bottom.. me Im a bottom guy think about the logic, when downloading the page downloads top to bottom in a sense correct? so.. put the heavier of the weight at the bottom such as external scripts. anyway im getting off point, hopefully this helps some what.
FYI this is js code that works for the form validation:
$('#id-for-the-page-element').live( 'pageinit',function(event){
$('#id-for-the-form').validate(options);
});
Hope this helps someone else.
Related
I'm coding some basic validation (mainly for aesthetic purposes, will do the main stuff in PHP) with formvalidation, and I've noticed a big problem in that once I hit submit, if it goes back to the same page, all the fields are no longer validated. I've tried a couple of lines of code from googling the problem, but none seemed to work.
Here is one line that seems to run on the datepicker alright when you use it, but if I just stick it out in the option for the document ready function (I just use trial and error with jquery), it does nothing.
$('#main_form').formValidation('revalidateField', 'pcn');
From here I tried this:
$('#main_form').validate().form();
But for some reason the entire validation breaks when I use that.
Here is a jsfiddle using the jquery code I'm using, what I basically want is it to instantly say that the field is required when you hit run.
Alternatively, can I set it to default to a certain message? That way I have PHP validate it on page load.
Finally got it working after a lot of trial and error. It turned out to be quite a simple fix, but needed to be in the correct place.
Add this line below all the validation code:
$('#form_id').formValidation('validate');
I'm hiding it behind if(isset($_POST['submit'])), so it'll revalidate the form on submit, but not validate when you first load.
Ok so I have created a wizard and everything works great. But I have one little piece that seems to 'bother' me if you will.
In the last step of the wizard I build, it uses obflush to process data onto the screen
to show some actions happening. But the problem with that is, that the 'entire' page doesn't load until the obflush process is done, and then the page all lines up nicely and such.
Im wondering if there is such a way that maybe ajax can flush the obflush process?
Maybe this is completely wrong but this is how I can envision it happening.
User goes thru the wizard and gets to the final page
The entire page loads
At the end of the page is some ajax code to apply to a tag maybe
The ajax is refreshing itself every second to check against the update of the obflush and then outputting what the obflush has outputted to the screen.
Does that make sense?
Any insight is greatly appreciated.
Thanks
This question is about how to load part of a web page with Ajax. In particular, how to load the structure of a page, and then fill in the details with Ajax calls.
I assume the intention is for the structure to be loaded quickly because it does actually have some content, and then load parts of the page that take a long time to process. Otherwise the effect on screen will be that loading is actually slower.
I would use the JavaScript library jQuery to help with this, although it can be done without any libraries as shown in this question.
The browser makes a web page request and the server responds like it would normally, but just with the structure of the page
Within the basically empty page that was loaded, jQuery will then make an Ajax call with load() that will load the response from a URL into the specified HTML section.
The code would look like this, where my-intro-div is the id of a regular HTML div tag:
$(function() {
var myIntroDiv = $('#my-intro-div');
myIntroDiv.load('/my_intro_div.php');
});
The PHP script my_intro_div.php returns the HTML that is meant to be displayed inside the my-intro-div tag
There are some good examples in the jQuery documentation here:
http://api.jquery.com/load/
jQuery can help with a tonne of other things too. It has a tiny learning curve that can be a little steep, but after that I've found that it is the most intuitive "language" I work with.
i have a website that uses a number of containers (div's). In this scenario, we have three boxes down the left side and one bigger box on the right of these boxes. The bigger box on the right is the only thing that changes when a link is pressed, this is done with Javascript.
SO i have the index which is the main layout of the website and i also have the "pages" of the site, so when a link is pressed the main box (on the right) loads the new data.
On one of my pages i want to collect data and then run it through a PHP script that is in the head of the file, but when i click the button i realise it refreshes the whole page and it doesn't run the script on the page with the form.
Anyone had a problem like this, or know of something i could do to work around it?
I'm not really sure what code would be useful for helping me but if you need something just ask.
Thanks for the help
Since you are loading all your content via JS already, you could just POST the form data via AJAX to a PHP script to process, then read the output and either provide an error message or remove the form from the page and show your success message.
How to approach your AJAX call is dependant on what you've used as a basis for the rest of your JS.
Personally I like to use the JQuery library, as it makes AJAX calls (and much more) very simple.
How about you make the page design able to do it. Have the backend be able to spit out the state of the page when it posted.
Or use Ajax to post the data back and set the new state like you do already.
I'm currently working on a website that you'll find here: http://steadfastdesignfirm.com/rgw/. I used an ajax effect that I found online at CSS-Tricks to dynamically load content from another php page and animate it (fade in and fade out) when a navigation tab is clicked.
I have managed to get this working fine, as you will see (please note the only two working pages are "Home" and "Experience RGW"), however, all of the jQuery scripts in my document that apply to elements within the div that reloads are broken when the content is dynamically generated.
As a quick example, take a look at the text resize tool beneath the image rotator on the home page and try changing the font size. Now, click on the "Experience RGW" tab and scroll down to the text resize tool again. Notice that now that we've loaded in experience.php dynamically within the "#ajax" div, the script doesn't work. Also, if you click on the "Home" link now, you will also notice that the image rotator doesn't work.
I've looked high and low online and through multiple forums to try and figure out how to fix this, and I believe I have to incorporate the jQuery .live function, to apply the script to any element, whether it's currently visible or not. Otherwise, document.ready only runs the scripts once after the DOM loads and will not affect the ajax loaded content. Is that correct? If so, how do I apply that to multiple jQuery files executed on my page?
Well, this is totally driving me crazy and I've tried hard to get it, but I just can't quite figure it out. I'm fairly new to jQuery, but am trying to learn fast. I would post some of the code here, but there is a lot involved in this question. :)
If anyone would be willing to shoot out a quick answer, or a few lines of code, I'd greatly appreciate it.
FYI: The script that runs the ajax effect is in ./scripts/page.js. Also, please remember that I currently have only the Home page and Experience RGW page working correctly, so please don't waste time trying to diagnose problems on the other pages. I haven't gotten to them yet. :)
Here is a link to some of the code on jsfiddle: http://jsfiddle.net/taylortsantles/R33YV/.
Thanks,
Taylor
I'm behind a proxy and can't see your page, but it sounds like the events are not being re-attached to the content created through ajax.
I'll try to explain, when your page loads the first time, you are attaching jQuery events to DOM objects on document.ready(), this function will be called only once.
Every time you drop DOM objects and create new ones with the ajax response, these new objects never get jQuery events attached again, since the document.ready() function didn't fire.
You can try putting your event-attaching code in a different function and invoke that function on document.ready() AND after every DOM modification (your ajax call to change the tab content).
Hope it helps.
The problem is a breakdown in the order of executing code.
page loads
load event fires and sets up elements
click event
ajax loads the new page
The new page doesn't have any events set to it. Two solutions
use "live" links in the window.load event callback
use run the page load code again.
Solution 1 is nice but if you have an specific plugin used then it won't be the total solution.
Solution 2 can be implemented by pulling out your code in window.load and wrapping in another function. Just all it onload and then in the callback when the ajax loads.
I know how frustrating is can be. I hope this helps.
You need to rebind any events after dynamically loading in elements to a page, as Javascript sees these as totally new DOM elements.
You can achieve this by modifying the code you use to update the page:
$(window).bind('hashchange', function(){
newHash = window.location.hash.substring(1);
if (newHash) {
$mainContent
.find("#ajax")
.fadeOut(200, function() {
$mainContent.hide().load(newHash + " #ajax", function() {
$mainContent.fadeIn(200, function() {
$pageWrap.animate({
height: baseHeight + $mainContent.height() + "px"
});
});
$("nav li").removeClass("on");
$("nav a[href='"+newHash+"']").parent().addClass("on");
// Rebind any events
documenttextsizer.setup("text-resize");
});
});
};
});
This applies to any events that happen WITHIN the updated elements in the page. So after the comment "//Rebind any events" you can add others as they are required! Hope that helps :)
refreshing a top bar just like facebook where the no of messages are getting updated when the new messages comes just like facebook or gmail without refreshing the whole page . i can do this if that top bar is located externally i can refresh that bar with either meta tag set timeout or with refresh tag , but not getting how to refresh when it is part of main page.how to do this without reloading whole page and without any external file as the full code of the inbox and alert is located in main.php so i cant take it out and call these function externally.
maybe you can try to set a timer to pick new messages with ajax method and use js to change dom element's performance.
You need to use a partial page refresh using an AJAX callback. A good place to start learning AJAX is the Google Code University and the jQuery JavaScript framework.
Not sure what you want, but try this one: http://www.brightcherry.co.uk/scribbles/2009/02/26/jquery-auto-refresh-div-every-x-seconds/
Sujit, you definetly need to use AJAX. I think you have not explained yourself very clearly, but you are saying you want all the code on the same page, that's a bad programming practice. You need to use AJAX and have "code separation" (separate HTML from JS from PHP).
Maybe you are afraid of using AJAX, I recommend and easy library for managing AJAX, it's called SACK. You can see a nice an easy tutorial here.
Hope that works for you.
What about this then
setInterval(function(){
SomeAjaxFunction();
}, 1000);