i'm busy writing my very first jquery plugin and i ran into some problems. I have modified and customized other people's plugins quite succesfully in the past, but i'm more a designer than a programmer and this is my first javascript/jquery experiment build from scratch. with a lot of research and plenty of try and error i managed to realize most of the features i wanted. and besides the code probably being dirty, inconsistent and a pita for every pro, the plugin is working pretty well. the problem i have is, the way i've written it, i apparently cannot use more than one intance of the plugin on one page. if i do, it breaks appart. i tried to wrap the whole thing into a this.each function, but this as well breaks everything appart. right now, i have no clue at all, how to make this work. I'm grateful for any suggestions or hints, as my brain slowly starts to boil.
here's the little sucker: the .js file
you can see it in action here: demo
when you say more then one instance, I'm imagining a clone of your demo, so two of the same thing on one page.
one problem I see is that you are using ID's in your plugin, and you shouldn't be using ID's when you want multiples of the same thing to be able to live on the same page. try and switch to classes.
Related
After weeks of trying and testing to find a solution for my needs I admit that I still have no idea how I can solve this problem.
It sounds simple: I want that a user is able to mention things in a text area similar to twitter.
The problem is that I can't seem to manage it to make it work. Every browser has its own specialties which are coming into my way and break things. I have tried multiple different attempts but none of them worked even on a single browser completely.. mixing text and HTML appears to be incredibly hard to do.
So here I am. Asking you guys for any kind of help. Whether it's a library you can recommend me that is already doing what I need here, or if you did something similar and can tell me what exactly you did to make this work on multiply browsers.
My current solution looks something like this: Hitting # will insert a input text field into a div contenteditable everything is working nice so far unless the whole thing is the first element of a row. If the caret is also at position 0 and the user hits Enter, then something dies inside the browser which removes the whole input box without further notice or any events - at least not on Chrome. That was the most promising solution that I was able to come up with. Don't think I didn't try to save it by inserting e.g. a native Text with a zero-whitespace-character but that doesn't work either. It works better - but not completely.
I'm really frustrated by now and this is holding my whole project back which has this key feature that has to work properly - mainly because the information put there is going to be persisted as XML but that is a completely different story.
I really hope somebody can help me to get a solution for this. Bear in mind that I am actually using GWT 2.8.0 but I would not mind to use/wrap a JavaScript library at this point ..
Hi folks I am building a CRUD system very similar to this example http://jsfiddle.net/rniemeyer/WpnTU/.
Context:
I have several HTML pages that each contain the same table of data but showing different information (each page have their diffirent use).
On each row theres an edit button like yuo see in the example. Since the modal form is the same accross all the HTML pages I decided to create one HTML page containing the modal form. I then use jquerys load function like so $("#load_modal").load("pages/modal_form.html"); on each of the HTML pages.
Problem:
On a basic HTML page this is working out great. I tought this was a brilliant approach and gave myself a pat on the back. But now the problem I have is that when started implementing knockout it dosent seems to be working together very well. Modal dosent always pop up correctly and such.
My question:
At this point im not looking to figure out my code issue. I spent days and weeks staring at it and I came to the conclusion that I need to rethink my approach altogether. Im curios to hear some of your opnions on what would be the best aproach to tackle something like this.
Ideas so far:
I found this https://github.com/rniemeyer/knockout-amd-helpers/tree/master/examples But dosent use the latest knockout version and seems more complicated for something simple I need.
I also saw that using requireJS would be another idea but honestly these seem to complicate things for me.
Would anyone know of a simpler template solution or even have a whole different approach to this?
Using jQuery to modify your DOM is not going to work well in Knockout. You can use components to define the form HTML. Use an observable to switch which component is displayed.
I'm learning web design, and there is no better method than redoing others work. So I'm reading other pages code, but it's so hard to find the jQuery, Javascript or modernizer or ... code responsible for the effect.
I'm using firebug, also used firequery, but the problem is they give me the event but not the code and a big tree of DOM, I don't know where even I look into it.
I really don't care which event is triggered, but I do care how the code is written. If I find the code so I can understand the event is on click or on focus...
Or let's say a website has a some javascript file, linked to a website. when I load the webpage i get a webpage consist of DOM and external/internal script. When I see a cool effect and want to read the code, I run firebug, inspect element to find the element. After that I don't know what to do? I can't search for selector or event in the script because maybe the developer of the site used different selector that I'm searching. Sometimes I find the code, but it's so jammed, not in human readable form, I don't know how to change the code to something indent and neat
The problem becomes more dramatic when the website using other java framework than jQuery.
I've searched a lot, used many tools, but couldn't find anything useful, please with your advice light my way to learn web developing
edit:--
I found a way but I'm sure there should be a better way outside
first in chrome I inspect the element to find the corresponding element, then i right click and check all the break point on it(if it doesn't work i do the same for parent element)
after that i play with that element to trigger the function and it break
usually the function that called the method is down in the callstack
also for reading
also for reading the script i use pretty print of chrome, i used some online prettyfier but most of them has limitation in number of character, for a long script none of the google first page resault is good enough. so the only good option here is for now is chrome, anyone have any other method?
It is difficult to learn how to do things just from inspecting it, as many effects may be implemented entirely in JavaScript, which may be deep, hidden away in a source file.
You mention that the code is not in human readable form, beautifying it may help:
https://stackoverflow.com/a/6318092/1061602
Most 'visual' effects should be able to be viewable from the CSS, e.g. JQuery Mobile's buttons, it is possible to see how the different classes are combined, ui-shadow, ui-btn, ui-disabled etc
Otherwise, searching for selectors is pretty much all you can do. Personally, if I am learning, looking at too much code at one time can be overwhelming. Also a lot of the UI effects may be difficult to trace.
My advice is, perhaps a better way around it would be to try and describe one single effect that you require, and then search on Google or Stack Overflow for guidance on how to create that effect.
The usual documentation sources will be useful:
http://www.w3schools.com/css3/default.asp
http://api.jquery.com/
Happy learning!
This may be a very basic question, but is it possible to post a jsfiddle that captures a Rails environment, the js, css, and HTML that is generating a nagging problem? I posted another SO question here: Unable to float a twitter bootstrap navbar item right with either class=pull-right or float:right
... and it was suggested I post something to jsfiddle. Honestly, I'm just completely in the dark as to how I might gather the css, js, and HTML in a way that can be copy-pasted into jsfiddle. Is there some slick way to pull the 4 necessary components together?
I am mostly interested in being being able to share and debug code that pertains to display and layout.
Many thanks in advance.
Sites like jsfiddle and jsbin are useful as testbeds for various issues involving HTML, CSS, and JavaScript. A good workflow for using them might be as follows:
Before going to one of those sites, use a browser debugger (Firebug, the Chrome debugger, or even the debugger in modern versions of IE if you must) to figure out the mechanics of the issue. Are you seeing unexpected JavaScript behavior? Weird layout? Whatever the problem, see if you can narrow the focus as much as possible.
Now, go to one of the workbench sites (make an account for yourself too; it helps to be able to find old experiments) and start trying to reproduce the problem. Start as simply as possible and work up. It can be hard and frustrating, but in my experience even the process of trying to figure out an isolating test case can itself lead to enlightenment :-)
If you do manage to isolate a behavior that you don't understand or can't explain or whatever, you can then save the test case (jsfiddle has "Save" and "Update" buttons; jsbin seems to magically save things automatically) and then post the URL here (or anyplace else). If you do post here, it's a good idea to copy the relevant code from your test case directly into your question.
I use both of those sites (and there may be more of them out there). The jsbin site gives you a little more control over your page, and provides a way to see your page outside of an <iframe>. That's kind-of important if you're testing for mobile applications. Otherwise they're both great resources.
Oh, and both sites let you import various popular libraries via simple configuration tools. That's really handy for tracking bugs that you think may have been introduced by a library version change (rare, but really freaky when it happens).
new to jquery need help please!!... - I'm trying to create two carousels on the home page using the example below but doesn't seem to work.
I realise that the example is using ids, tried to change them to classes but didnt it do much.
http://www.dreamcss.com/2009/04/create-beautiful-jquery-sliders.html
Thanks
An important philosophy in jQuery is "Don't reinvent the wheel."
Just use a plugin for features like this, such as Easy Slider!
Here's a demo of more than one on a single page
Oh, and in the future, be sure to describe what doesn't work as well as your code if you want people to actually be able to help you with your specific problem.