I have just started learning Javascript and Ok here is a code I want to try and see it in the browser, so I create a test.js file and put this in it:
function useless(callback) {
return callback
}
var text = 'Amigo';
assert(
useless(function(){ return text; }) === text,
"The useless function works! " + text);
But still there is more, I should write a minimum HTML page than can call this function, What is sample HTML to host this method in it?
I have written something like this but still there is something wrong with it:
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script src="hehe.js" >
useless('Amigo');
window.onload=useless('Amigo')
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript" src="hehe.js"></script>
<script >
useless('Amigo');
window.onload=useless('Amigo')
</script>
</body>
</html>
You can load the source in a separate script from the inline one that you call it in. Note that this assumes that hehe.js is in the root directory of your site.
For testing js in general jsFiddle is a nice resource that lets you define your html/js/css and experiment with small changes without having to write out all the files.
Related
I was setting up a basic website, but for some reason when I went to test it I was confused to find that it wasn't quite working like usual. I keep getting this error.
"Uncaught ReferenceError: revealMessage is not defined"
<!DOCTYPE html>
<html>
<head>
<script src="js/script.js"></script>
<title>Rock Paper Scissors!</title>
</head>
<body>
<button onclick="revealMessage()">Click!</button>
<p id="hiddenMessage" style="display:none">hidden message thingy</p>
</body>
</html>
function revealMessage() {
document.getElementById("hiddenMessage").style.display = "block";
}
The only thing I can see that could be a possible issue is if your JavaScript file is not within a folder named "js". You said that your js is in another folder; if it is named anything other than "js", then your html file is trying to access the JS file within a folder that does not exist. So your file structure should look like
- [html file name].html
- js/
- script.js
Your two snippets were disconnected. Just put HTML and JS code into same snippet and it should work. See below:
function revealMessage() {
document.getElementById("hiddenMessage").style.display = "block";
}
<!DOCTYPE html>
<html>
<head>
<script src="js/script.js"></script>
<title>Rock Paper Scissors!</title>
</head>
<body>
<button onclick="revealMessage()">Click!</button>
<p id="hiddenMessage" style="display:none">hidden message thingy</p>
</body>
</html>
Looks like there is no problem with the code but just check if your function is in global scope or local scope.
Also make sure that your js file is linked to your html properly. Check your js file with a basic alert();
hi I am new to Javascript and I am trying to use jQuery but it doesn't work if I'm using it on another js file, but if directly inputted into my HTML file it works.
Here is the try.js file:
$("#btn1").click(fn1);
function fn1(){
$("#heading1").fadeToggle();
}
and the HTML code:
<!DOCTYPE html>
<html>
<head>
<title>Javascript trial ANIMATIONS </title>
<script src="jquery.js"></script>
<script src="try.js" type='text/javascript'></script>
</head>
<body>
<h2 id="heading1">SETTING UP JQUERY</h2>
<button id="btn1">click me</button>
</body>
<HTML>
Also how can I see the library of jQuery while typing in another js file. I'm using vs code
May be you can use manipulation with dom when document will been load.
function fn1(){
$("#heading1").fadeToggle();
}
$(function() {
$("#btn1").click(fn1);
});
Check out responses to this question. You might get an idea on how to proceed.
Okay so all I am trying to do is make the jquery work in my javascript file which is linked to a html file. I created a totally new file for this to test it. The whole contents of the html file are:
<!DOCTYPE html>
<html>
<script src="C:\Users\Me\Desktop\Programming\jquery-1.12.4" type="text/javascript"></script>
<script src="check.js"></script>
<head> <h1>test</h1>
</head>
<body>
</body>
</html>
And the whole content of the js file is
$("h1").css("color", "red");
But when I open the html file in chrome the change I put in the js file with jquery doesn't show up (e.g the heading is not red). I just want to figure out how to make it so that it does.
EDIT:
Thanks for the help everybody, I was able to make it work :)
did you try this?
$(document).ready(function(){
$("h1").css("color", "red");
});
not sure but, does your browser access local files directly? im pretty sure that browser sandbox gonna reject that, maybe cors plugin on chrome?
EDIT:
try importing this instead...
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
Move your <h1> tag to be in the <body>
Move your <script> tags to the <head>
Replace your code in your JS file with what imvain2 said, so
that the JS will load once your document is ready.
Make sure you are correctly referencing your jQuery script. You can even use this to test it out:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
Try to use jQuery CDN, this way you don't need to worry if jQuery loaded correctly or not.
$(document).ready(function() {
$("h1").css("color", "red");
});
<!DOCTYPE html>
<html>
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script src="check.js"></script>
<head></head>
<body>
<h1>test</h1>
</body>
</html>
There are a couple issue as described in other posts. All your meta, script, css references, etc. should go int the <head> and never header tags. Also need to correctly reference your javascript files.
<head>
</head>
<body>
<header>
<h1>test</h1>
</header>
</body>
Example: JSFiddle
If you want to use jquery in .js file all you need to do is type: src=" ..." above code.
I'm trying to figure out how to use rx.js with a dog-simple example, but can't figure out what reference or file I'm missing that means it isn't working.
<!DOCTYPE html>
<html>
<head>
<title>Empty</title>
<script src="/Scripts/rx.js"></script>
</head>
<body>
<script>
var thing = Rx.Observable.fromEvent(document, 'keydown');
</script>
</body>
</html>
That's literally it. The script line correctly loads a local copy of rx.js 2.4.1 freshly downloaded from nuget.
I'm getting the error Rx.Observable.fromEvent is not a function, so I'm assuming that there is a missing reference.
It might just be the time of night, but I'm struggling to see what I'm doing wrong. Any help?
Resolved by downloading and using additional Rx files rx.async.js and rx.binding.js like so:
<!DOCTYPE html>
<html>
<head>
<title>Empty</title>
<script src="/Scripts/rx.js"></script>
<script src="/Scripts/rx.async.js"></script>
<script src="/Scripts/rx.binding.js"></script>
</head>
<body>
<script>
var thing = Rx.Observable.fromEvent(document, 'keydown');
</script>
</body>
</html>
I have a simple javascript file like so:
$(document).ready(function () {
alert("my controller");
});
I have an HTML file like so:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script>
</head>
<body>
<script type="text/javascript" src="/js/generateLineupController.js"></script>
</body>
</html>
for the love of all things holy why in the world would the alert not show? I get a 200 on GET for the javascript file, so it's loading.
Several problems here.
You're trying to load the script twice for some reason. Don't do that. Load it in <head>, or at the end of <body>, but not both.
You're trying to use jQuery syntax ($(...)), but you haven't loaded the jQuery library. You'll need that.
The $(document).ready(...) indicates that you are trying to use jQuery, but you aren't loading jQuery in your page. Check your console log; you will see the errors there.
Also, there's no need to load the script twice with two <script> tags; just load it once.