What i want to do is simple. When i click the image, i want some message to appear.
Afterwards, when i click it again i want it to disappear. I have problems iplementing it
due to my lack of jQuery knowledge. I would appreciate some help with the following code, as well as some other implementations. I know i can do something with class="hidden" and have jQuery add/remove it but oh well.
This is what i'm trying to work with.
<!DOCTYPE html>
<html>
<head>
<script>
function greet(){
a = document.getElementById('here');
if (a.trim().length==0){
a.innerHTML = 'message!';
}
else{
a.innerHTML = '';
}
</script>
</head>
<body>
<img src="http://www.clker.com/cliparts/K/9/M/I/M/8/on-button-small-th.png" alt="alt" onclick="greet()"/>
<p id='here'></p>
</body>
</html>
EDIT: seems like i should use a.value, but i must be doing something else wrong too.
If you are using jQuery it is very simple; just use this as your JavaScript (don't forget to link the jQuery main library - I like the Google CDN for that). Just use the toggle function:
function greet() {
$('#here').toggle();
}
Also it is better to register the onClick through jQuery rather than your html (for examplesee this SO question). So that would be like this for the whole page instead :
<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script>
$( document).ready(function() {
$("#greet").click(
function () {
$('#here').toggle();
}
);
$("#here").hide();
}
</script>
</head>
<body>
<img id="greet" src="http://www.clker.com/cliparts/K/9/M/I/M/8/on-button-small-th.png" alt="alt"/>
<p id='here'><!--MESSAGE SHOULD BE HERE--></p>
</body>
</html>
Working example in jsFiddle.
Related
I apologize in advance if this has been asked before. So the circumstances I mentioned in the title is this:
I am writing html into a new window.document.open() object. The html I am writing also includes in the head.
This is the script I am not able to run,
<script type="text/javascript" src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<script>
$(document).ready(function(){
alert('This is working!');
});
</script>
The interesting thing is that every other jquery code works. For example in my html I have a button with id='but' and this script works
$('#but').click(function(){
alert('you clicked a button')'
});
so why is the $(document).ready() not working? Is this because window.document.open() doesn't count as document for jquery?
Thanks in advance.
edit: I think my question is unclear. I am terribly sorry about that. Here's the situation:
I have a javascript file that essentially has this:
var w=window.open();
var temp=`
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> Template for converted files</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<script type="text/javascript" src="file.js"></script>
<script>
$(document).ready(function(){
alert('This is working!');
});
</script>
</head>
<body class="body">
<button id='but'>click me!</button>
</body>
</html?
`;
w.document.open();
w.document.write(temp);
the file file.js has the following:
$('#but').click(function(){
alert('you clicked a button')'
});
now when I run the first JS file, I am able to open a new window with the button. when clicked it says "you clicked a new button"
But the alert "This is working!", isn't working.
Hope this makes the situation clear. I am really sorry for not being clear from the start.
Because jQuery has no method open() in it's api.
open() is a window method only.
You can refer to the new window by passing it to a variable:
var win = window.open(url[,options])
I'm trying to figure out why my function $ is not displaying the location of my link:
<html>
<head>
<title>Link Test</title>
</head>
<body>
<a id="mylink" href="hxxp://mysite.com">Click me</a><br>
<script>
$('mylink').href
function $(id)
{
return document.getElementById(id)
}
</script>
</body>
</html>
here is your code modified to output the href value in three different ways, pick which ever you like.
<html>
<head>
<title>Link Test</title>
</head>
<body>
<a id="mylink" href="hxxp://mysite.com">Click me</a><br>
<span id="out"></span>
<script>
console.log($('mylink').href);
document.getElementById('out').innerHTML=$('mylink').href;
alert($('mylink').href);
function $(id)
{
return document.getElementById(id)
}
</script>
</body>
</html>
however I am pretty sure that's not your intent. I am not sure why you are using $ as your function name, nor why are you trying to output the href. Your intent is not clear, but I have a feeling you are not approaching things correctly.
You aren't doing anything with the href property.
Your code is equivalent to:
<script>
"hxxp://mysite.com";
</script>
You need to pass it to a function that will display it (such as console.log or alert).
I personally don't see anything wrong with your code... Though it may not be perfect and fit all the standards, it seems fine to me. If you just want to output it or something, because it isn't doing anything now, use the following code:
document.write("Link Address: " + $('mylink').href)
Here is an example.
I think I just need a second pair of eyes on this one. The div's onclick event doesn't seem to be working. Any ideas?
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title="My First Program"/>
<script type="text/javascript">
window.onload = function(){
window.alert("If you see me then the page has loaded");
click();
}
//we do programming here
/*because
it is
fun*/
window.alert("Helo World!");
function click(){
window.alert("CLICK!!!!");
}
</script>
</head>
<body>
<div>This web page will run my first program</div>
<!--this will be awesome-->
<br>
<br>
<br>
<div id="d1" onclick="click()">Click me</div>
</body>
Also, for the reccord, this is not my first program.
your html is malformed. the title tag needs to look like this:
<title>My First Program</title>
Also, you seem to have a naming conflict because you named your function the same thing as a built-in function. rename your 'click' function to 'myclick' or something else.
Once you fix that, everything else should be good.
When something is going weird, the first thing you should always do is validate your markup.
http://validator.w3.org/check
Here is the complete, working version of the markup.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>My First Program</title>
<script type="text/javascript">
window.onload = function(){
window.alert("If you see me then the page has loaded");
click();
}
//we do programming here
/*because
it is
fun*/
window.alert("Helo World!");
function myclick(){
window.alert("CLICK!!!!");
}
</script>
</head>
<body>
<div>This web page will run my first program</div>
<!--this will be awesome-->
<br>
<br>
<br>
<div id="d1" onclick="myclick()">Click me</div>
</body>
Every time I see a question like this anywhere, the typical answer I give is "don't use the Netscape model for event handling".
Give this a read - http://www.quirksmode.org/js/introevents.html
Update: Looks like "click" isn't a very good name for a function, since it's already registered for events and such, which is likely why it didn't work. I should have caught that.
This question already has answers here:
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 6 years ago.
Ok. I need fresh eyes because I'm still on this s***d problem for one hour!
Here is my simple HTML code (testssio.html) that include javascript script:
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var ssio = document.getElementById('ssio');
ssio.html = "it finally works!";
</script>
</head>
<body>
<div id="ssio"></div>
</body>
</html>
But it doesn't work! Using the debugger, I get:
Uncaught TypeError: Cannot set property 'html' of null /testssio/:6
Does anyone get it? I know it's not the correct place to look for debugging help, but I'll be crazy if I don't get it! So please, any help?
Tahnks in advance.
The reason for this is that scripts in the head load before the page is rendered. This means your content is not yet rendered and therefore not a part of document.
If you want to see this work, try moving your script below the element renders, like this:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="ssio"></div>
<script type="text/javascript">
var ssio = document.getElementById('ssio');
ssio.innerHTML = "it finally works!";
</script>
</body>
</html>
A more standardized way of doing this is with events. Many people use jQuery but it can be done with plain js. This would mean changing your script like this:
<script type="text/javascript">
function WinLoad() {
var ssio = document.getElementById('ssio');
ssio.innerHTML = "It finally works!";
}
window.onload = WinLoad;
</script>
This way you can still leave it in the <head>.
Also, using .html is from jQuery. It is generally used as .html(content). If you want to use the plain javascript version use .innerHTML = content.
I mention jQuery so much because it is a highly used API. This quote is from their site:
jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript.
Your code is running too early before the DOM is loaded and thus document.getElementById() doesn't find the element in the document yet.
You can either move your script tag down to right before the </body> tag or you can wait for the DOM to load before running your code with either the window onload event or a DOMReady event.
There are two errors here. First, you need to put the SCRIPT tag after the element. Second, it's not .html, but .innerHTML. So here is the corrected code:
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="ssio"></div>
<script type="text/javascript">
var ssio = document.getElementById('ssio');
ssio.innerHTML = "it finally works!";
</script>
</body>
</html>
you can use something like this
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
document.onload= function(){
var ssio = document.getElementById('ssio');
ssio.html = "it finally works!";
}
</script>
</head>
<body>
<div id="ssio"></div>
I know that Document.ready - DONt wait for images to download.
So why it does here ?
http://jsbin.com/ehuke4/27/edit#source
(after each test - change the v=xxx in the img SRC)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
alert('0');
});
</script>
</head>
<body >
<img src='http://musically.com/blog/wp-content/uploads/2011/04/Google-Logo.jpg?v=42333' />
</body>
</html>
I think, the problem comes out from JSBin.com
Because, when you try this example on JSFiddle.net, it works properly
http://jsfiddle.net/vqte9/
It has to do with the fact that you're using "alert()", I think, though I'm not 100% sure why. If you change your code like this:
<body>
<div id='x'></div>
<img ...>
</body>
<script>
$(function() { $('#x').text("hello there"); });
</script>
you'll see that the text is filled in before the image loads.
edit — I don't know why this would make a difference, but I notice quite different behavior when I set up the ready handler with:
$(function() { whatever; });
and:
$(document).ready(function() { whatever; });
Now that's not supposed to be the case; the two forms are supposed to do exactly the same thing, as far as I know. However, they don't seem to. Here is a jsbin example that sets up the ready handler with the first form, and here is one that uses the second one. They behave very differently for me. I'll have to check the jQuery source to figure out how that can be true.
Here is the jQuery documentation explaining the equivalence of $(handler) and $(document).ready(handler).