This question already has answers here:
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 3 years ago.
so I'm using this Javascript (API) that has a bunch of function. How do I go about writing it to an HTML file?
so one of the function is "api.ping()" which works fine on powershell, but I cant get it to print that in an HTML file.
So in the script I wrote
document.getElementById("demo").innerHTML = api.ping();
and the HTML is
<!DOCTYPE html>
<html>
<body>
<script type="index.js"></script>
<p id="demo"></p>
</body>
</html>
I'm trying to put the value returned from the call onto the HTML file.
I think your index.js file is probably not being included. You'll want to change the tag line to read:
<script type="text/javascript" src="index.js"></script>
Assuming that index.js is in the same directory as this HTML file.
Related
This question already has answers here:
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 8 months ago.
I wanted to use Dart to replace JavaScript.
But it's not an advanced project. It's just a matter of dynamically changing a few elements within a single page.
For starters, I wrote the following HTML code and Dart code to find the element based on its ID and display the text in the console.
<!-- index.html -->
<html>
<head>
<title>Test</title>
<script type="text/javascript" src="index.js"></script>
</head>
<body>
<p id="first-paragraph">Target.</p>
</body>
</html>
// index.dart
import 'dart:html';
void main() {
print(querySelector('#first-paragraph')?.innerText);
}
The following command converts the file to a JavaScript file.
dart compile js index.dart -o index.js -O0
However, when I open the HTML file, the console shows null.
The first code in Dart Pad HTML mode, which is very similar to the above code, appears to work (on Dart Pad).
Why can't my code find the element?
Thanks.
Thank you for your comments. I remembered from your comments and was able to get it to work as expected by placing the script readout at the end of the body element or using window.addEventListener. I am ashamed to say that I forgot to do something so simple.
<!-- index.html -->
<html>
<head>
<title>Test</title>
</head>
<body>
<p id="first-paragraph">Target.</p>
<script type="text/javascript" src="index.js"></script>
</body>
</html>
or
// index.dart
import 'dart:html';
void main() {
window.addEventListener('DOMContentLoaded', (event) {
print(querySelector('#first-paragraph')?.innerText);
});
}
This question already has answers here:
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 3 years ago.
I'm trying to use function closure in my javascript as follows:
In my html file:
<head>
<script src="myscript.js"></script>
</head>
<body>
<section id="mysectionId"></section>
</body>
In myscript.js:
(function() {
var id = document.getElementById('mysectionId');
console.log(id);
}());
However, id seems to equal null. I'm not sure what I've done wrong - does function closure scope exclude globals like 'document'? If so, how come I can still use 'console.log()' inside the function closure?
You're javascript is running before your html loads. Put your script tag after your html content at the very bottom of the body
<head>
// put css here
</head>
<body>
<section id="mysection"></section>
<script src="myscript.js"></script>
</body>
This question already has answers here:
How to pass variable value between different html pages in javascript
(5 answers)
Closed 3 years ago.
Hello I wanted to send data from one html page to another
For eg this is my index.html page
<html>
<body>
<script>
var uname = "karan"; // I want to send this
</script>
</body>
</html>
And this is newPage.html:
<html>
<body>
<script>
console.log(uname); // I want the uname form index.html
</script>
</body>
</html>
I have already tried declaring a new class in another javascript file but it gives undefined
Is there any way I can do this? Thank you
use session storage like this:
sessionStorage.setItem("uname", "karan");
and retrieve it like this on another page:
console.log(sessionStorage.getItem("uname"));
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.
I am very new to jQuery, literally just trying to get it to work for the first time. Only the alert box works, but none of the other very simple methods I am trying out. Here are the files:
HTML:
<!DOCTYPE HTML>
<html>
<head>
<title>jquery</title>
<script type="text/javascript" src="jquery-3.1.0.min.js"></script>
<script type="text/javascript" src="myJavaScript.js"></script>
</head>
<body>
<h1 id="title">This is a title</h1>
<p> This is some sample text.</p>
</body>
</html>
JavaScript file:
$(document).ready(function (){alert("this works!")});
$("#title").text("but this is not not working");
As you can see the example can't be simpler. I have off course downloaded the jquery-3.1.0.min.js file and put it in the same folder as the html. If I comment out the link, the alert stops working, so I now the file is being referenced OK. Why is the second line of jQuery not working? Many thanks, P
Because the DOM(the entire structure of your application) isn't loaded yet. You need to use a $(document).ready(makes sure the DOM is loaded before running jQuery code) or an event handler to make the change visible.
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.
I don't understand why this simple script works only when I place it in the body?
when i place the script within the head or in external JS file it doesn't work.
<!DOCTYPE html>
<html>
<body>
<h1>My First Web Page</h1>
<p>My First Paragraph</p>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML = 5 + 6;
</script>
</body>
</html>
Because the element you reference is defined only later (at the time the <head> is processed the browser hasn't processed the markup underneath it yet).