JavaScript Function Not Displaying Link Address - javascript

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.

Related

$(document).open() not working under these circumstances

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])

my simple code is not working

my very simple html code, actually my javascript code is not working, here is my code:
<!DOCTYPE html>
<html>
<head>
<script>
function write(){
document.getElementById("div1").innerHTML = "hello world";
}
</script>
</head>
<body>
<div id="div1" onclick="write()">hello</div>
</body>
</html>
i want to change the <div> content to "hello world". but when i try to do it, when i click the <div> element, its content is erased and it gives me a blank page. what am i doing wrong? any help would be appreciated.
That happens because 'write' is already defined as a method from the document object. You need to change the name of the method to something else.

Show & Hide an element after click

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.

What's wrong with this javascript/HTML

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.

Get javascript to write text exactly where it is

is it possible to get javascript to output html where the javascript code is?
For example
<html>
<head>
<title>
</title>
</head>
<body>
<div>header</div>
<div>main
<script type="text/javascript" language="javascript">
// print some html here, maybe google
</script>
</div>
<div>footer</div>
</body>
</html>
Where the end results would look like:
<html>
<head>
<title>
</title>
</head>
<body>
<div>header</div>
<div>maingoogle</div>
</script>
</div>
<div>footer</div>
</body>
</html>
I understand that I can give the containing div and id and then get javascript to insert the anchor take like that, but I just wanted to know if it's possible to do this directly, as in write the html exactly where the javascript is?
Use document.write('YOUR_TEXT') for that
<script type="text/javascript" language="javascript">
document.write('google')
</script>
jsFiddle demo
Yes, although there are a lot of nuances to document.write, it'll output its contents immediately after the calling script element.
warning: document.write will obliterate your DOM once the dom is closed for writing. If you need to call a function asynchronously, you'll have to do DOM manipulation, otherwise document.write will rewrite everything with whatever it's supposed to output. This leads to unintentional results, which is why it's often discouraged.

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