Not sure I titled this well.. show's that I'm in unfamiliar territory. How can I run a JavaScript function based off of the element called in a jQuery function?
Theory:
<script type="text/javascript">
$.fillit('video');
</script>
(run fillit on video tag present in page.. interchangable with other elements)
$.fillit = function(){
this is where it says "run on the tag defined in the jQuery function"
}):
$.fn.extend({
fillit : function(){...}
});
then...
$('.video').fillit();
Edit (after comments)
To fill a dom element with other elements/html:
var img = document.createElement('img');
img.setAttribute('src', 'somesrc.jpg');
$('.video').append(img);
or
$('.video').html('<img src="somesrc.jpg"/>');
You can do it the way you described like so
<script type="text/javascript" language="javascript">
$.fillit = function(content)
{
$("result").html(content);
}
//call function
$.fillit("HELLO WORLD");
</script>
or as Alexander just posted if you want to do it on the selected element.
I don't think adding functions directly to jquery with $.func = is a good idea though. If jQuery ever adds a fillit method your method will conflict with theirs.
technopeasant, it sounds like you are using a jquery plugin (in your example, a plugin called 'fillit') and it is asking you to run the plugin on a tag or series of tags. Sorry if I misunderstood your question.
If that is the case, all you need to do is one of two things. If you are trying to run it on a very specific element in the HTML page (one with an id like <div id="myvideo"></div>) then all you need to do is run:
$('#myvideo').fillit();
//Notice the '#' symbol, that looks up the element with an id of 'myvideo'
If you want to run the plugin on a series of elements (like all <p> tags in the entire document, you'd run something like:
$('p').fillit()
//notice no '#', it's just looking up all <p> tags regardless of ID.
Take a look at the jQuery documentation regarding selectors to get a more concrete idea of how these selectors work:
http://docs.jquery.com/How_jQuery_Works
Someone answered with a link to this: http://docs.jquery.com/Plugins/Authoring
exactly what I was looking for. claim your kudos!
(function( $ ){
$.fn.fillit = function() {
this.fadeIn('normal', function(){
var container = $("<div />").attr("id", "filled")
.appendTo(container);
});
};
})( jQuery );
Related
I have a simple jquery script that changes the url path of the images. The only problem is the doesn't apply after I click the load more button. So I'm trying to do a workaround where it calls the script again after clicking the button.
<script type='text/javascript'>
$(document).ready(function ReplaceImage() {
$(".galleryItem img").each(function() {
$(this).attr("src", function(a, b) {
return b.replace("s72-c", "s300")
})
})
});
</script>
HTML
Load More
While Keith's answer will get you what you are looking for, I really can't recommend that approach. You are much better off with something like this.
<script type="text/javascript">
$(function() {
var replaceImage = function() {
$('.galleryItem img').each(function() {
$(this).attr('src', function(index, value) {
return value.replace('s72-c', 's300');
});
});
};
replaceImage();
$('.js-replace-image').on('click', replaceImage);
});
</script>
Using this html
<button class="js-replace-image">Load More</button>
By taking this approach, you do not expose any global variables onto the window object, which can be a point of issue if you work with other libraries (or developers) that don't manage their globals well.
Also, by moving to a class name and binding an event handler to the DOM node via JavaScript, you future proof yourself much more. Also allows yourself to easily add this functionality to more buttons very easily but just adding a class to it.
I updated the anchor tag to a button because of the semantics of what you need to do - it doesn't link out anywhere, it's just dynamic functionality on the page. This is what buttons are best served for.
I'd also recommend putting this in the footer of your site, because then, depending on your situation, you will already have the images updated properly without having to click the button. The only need for the button would be if you are dynamically inserting more images on the page after load, or if this script was in the head of your document (meaning jQuery couldn't know about the images yet).
I hope this helps, reach out if you have questions.
I have such problem:
I have a software which make an order confirmation in .html . I had to figure out how to delate some strings which I do not want to have on confirmation. Because of fact that I have not enough knowledge, I made something like that :
<script type="text/javascript">
document.body.innerHTML=document.body.innerHTML.replace(/<div id="boxik"><div class="nazwa">SZ.*font>/, '');
</script>
Very unprofessional code to remove everything between some div, but it is enough for my solution. It works perfectly in jsfiddle, but not in any browser. Maybe I should load so jquery libary ? I am not sure it is why I am asking for help.
http://jsfiddle.net/LTfyH/79/
Be aware of the fact you're using the id boxik two times. You can only use a id once.
If you want to remove only one element you can use something like:
var el = document.getElementById('boxik');
el.parentNode.removeChild(el);
If you want to remove multiple elements you can select them based on a class for example:
var elementsToRemove = document.querySelectorAll('.remove-me');
A example of both methods:
http://jsfiddle.net/LTfyH/81/
Notice that i added the class remove-me on two elements.
Try to do it in the document onload if you are using pure javascript:
(function () {
document.body.innerHTML=document.body.innerHTML.replace(/<div id="boxik"><div class="nazwa">SZ.*font>/, '');
})();
Or if you are using jQuery:
$(function() {
document.body.innerHTML=document.body.innerHTML.replace(/<div id="boxik"><div class="nazwa">SZ.*font>/, '');
});
So I'm not that great with Javascript so I'll put that forward right away. That being said, I've looked up as much as I could on this particular problem before asking, but the suggestions haven't solved my issues. I'm ultimately trying to pull all of the links from an iframe window on the same domain as the main page. Then I want to basically search that link array to match it with the current page to trigger a CSS modification to the html code (this part is not coded yet, FYI). So here is the part I have so far: Side note: The confirms are in there to debug the code and try to tell me where it's failing and what my queries are returning, they won't stay obviously when this is finished. I appreciate any advice that may help me fix this!
<script type="text/javascript">
// main is the iframe that I'm trying to search for a tags
document.getElementById("main").onload = function() {
confirm("test");
var main = document.getElementById("main");
var anchors = main.contentWindow.document.getElementsByTagName('a');
confirm(anchors[1]);
for (var i in anchors) {
confirm(anchors[i].getAttribute("href"));
}
};
</script>
I have created a plunker for you its working. I think its the placement of code in your file is causing the problem.
<iframe id="main" src="content_if.html"></iframe>
<script>
// main is the iframe that I'm trying to search for a tags
document.getElementById("main").onload = function() {
confirm("test");
var main = document.getElementById("main");
var anchors = main.contentWindow.document.getElementsByTagName('a');
confirm(anchors[1]);
for (var i in anchors) {
confirm(anchors[i].getAttribute("href"));
}
};
</script>
You should use jQuery to do this in a cross browser way. Include jQuery in page
<script src="https://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
and follow this post
There is a similar post about doing this and I agree with Mohamed-Yousef. If you can use jquery then you should do so!
$("#main").contents().find("a").each(function(element) {
// "each" will iterate through every a tag and inject them as the "element" argument
// visible in the scope of this anonymous function
});
EDIT:
You must include
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
above your code that references the $ variable. There are other ways to use jQuery but this is probably the easiest.
I have the following to snippets of code:
$(document).ready(function() {
document.head.appendChild(
$('<script />').attr('src', 'source.js').on('load', function() {
...
})[0]
);
});
This will fire the load handler.
Whereas using the normal jQuery append():
$(document).ready(function() {
$('head').append(
$('<script />').attr('src', 'source.js').on('load', function() {
...
})
);
});
This will not fire the load hander.
What am I missing: why does jQuery append() not work?
Is using document.head.appendChild() a bad idea?
NOTE: I can't use $.getScript(). The code will run on a local file system and chrome throws cross site script errors.
Update
Some people had trouble reading the compact style, so I used extra line feeds to clarify which objects where calling which methods. I also made it explicit that my code is inside a $(document).ready block.
Solution
In the end I went with:
$(document).ready(function() {
$('head')[0].appendChild(
$('<script />').attr('src', 'source.js').on('load', function() {
…
})[0]
);
});
I think #istos was right in that something in domManip is breaking load.
jQuery is doing some funny business in its DOM manipulation code. If you look at jQuery's source, you'll see that it uses a method called domManip() inside the append() method.
This domManip() method creates a document fragment (it looks like the node is first appended to a "safe" fragment) and has a lot of checks and conditions regarding scripts. I'm not sure why it uses a document fragment or why all the checks about scripts exist but using the native appendChild() instead of jQuery's append() method fires the event successfully. Here is the code:
Live JSBin: http://jsbin.com/qubuyariba/1/edit
var url = 'http://d3js.org/d3.v3.min.js';
var s = document.createElement('script');
s.src = url;
s.async = true;
$(s).on('load', function(e) {
console.log(!!window.d3); // d3 exists
$(document.body).append('<h1>Load fired!</h1>');
});
$('head').get(0).appendChild(s);
Update:
appendChild() is a well supported method and there is absolutely no reason not to use it in this case.
Maybe the problem is when you choose DOM appendChild, actually you called the function is document.on('load',function(){});, however when you choose jQuery append(), your code is $('head').on('load', function(){}).
The document and head are different.
You can type the code below:
$(document).find('head').append($('<script />').attr('src', 'source.js').end().on('load', function() {
...
}));
You should probably make sure that the jquery append is fired when the document is ready. It could be that head is not actually in the dom when the append fires.
you don't have to ditch jquery completely, you could use zeptojs. Secondly, I couldn't find out how and why exactly this behavior is happening. Even though i felt answer was to be found in links below. So far i can tell that if you insert element before definig src element then load won't fire.
But for manual insertion it doesn't matter. (????)
However, what i was able to discover is that if you use appendTo it works.
Code :http://jsfiddle.net/techsin/tngxnkk7/
var $ele = $('<script />').attr('src', link).load(function(){ abc(); }) ).appendTo('head');
New Info: As is understood adding script tag to dom with src attribute on it, initiates the download process of script mentioned in src. Manual insertion causes page to load external script, using append or appendTo causes jquery to initiate downloading of external js file. But event is attached using jquery and jquery initiates download then event won't fire. But if it's the page itself initiates the download then it does. Even if event is added manually, without jquery, adding via jquery to dom won't make it fire.
Links in which i think should be the answer...
Append Vs AppendChild JQuery
http://www.blog.highub.com/javascript/decoding-jquery-dommanip-dom-manipulation/
http://www.blog.highub.com/javascript/decoding-jquery-dommanip-dom-manipulation/
https://github.com/jquery/jquery/blob/master/src/manipulation.js#L477-523
http://ejohn.org/blog/dom-documentfragments/
Im trying to run the below script to understand the Javascript object and inheritance but don't see anything being displayed.
<html>
<head>
<script>
$(document).ready(
function Person(){
alert('New Person Created');
}
Person.prototype.sayHello = new function(){
alert('Hello');
};
var x = new Person();
x.sayHello();
var newfunction = x.sayHello;
newfunction.call(Person);
);
</script>
</head>
<body>
</body>
</html>
$ is defined in jQuery, you need to include jQuery library before using the $
you can include jquery library using cdn like this,
<script src ="//code.jquery.com/jquery-1.10.2.min.js"></script>
The first line of your script is jQuery. If you want to use jQuery you should include it first (based on what you have written I strongly suspect you don't need or want it just yet).
Alternatively, just drop the $(document).ready part and its {}s and that should get you going.
Also, take a look at your developer tools menu and get your JavaScript console open. It will have told you about this error.
When you use a construct like $(document), you are calling a function $, which is defined as jQuery. You need a <script> tag in your document to load the correct version of jQuery. Also, check your browser console. You will see an error there about $
The only thing I can see wrong is that you are trying to use the jQuery library, but you've never actually included it.