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 wrote a simple code to learn Eventhandling in JavaScript but when I click on the button "Click" the function hello() does not work, why?
html file:
<!DOCTYPE html>
<html>
<head>
<script src="hello.js"></script>
</head>
<body>
<button id="click">Click</button>
</body>
</html>
JavaScript file:
document.getElementById("click").onclick = hello;
function hello() {
alert("You Clicked!");
}
You are calling the script before the dom is generated. experiment to call the right before the tag.
Related
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 am new to HTML and JavaScript. I have put tag in head, but it is not working. Its code is given. However, it works when I place it in the body section. Why it is not working inside the tag?
<head>
<script>
document.getElementById("demo").innerHTML = "Hello, World!";
<script>
</head>
<body>
<p id = "demo"> </p>
</body>
It does, but your script is executed before your DOM is loaded properly. Use
window.onload = function() {
document.getElementById("demo").innerHTML = "Hello, World!";
}
Also it's possible to use the onload attribute:
<body onload="jsFunction()"></body>
This question already has answers here:
Javascript can't find element by id? [duplicate]
(5 answers)
Why does jQuery or a DOM method such as getElementById not find the element?
(6 answers)
Closed 4 years ago.
i cannot find answer to my question in someone else post so here it is:
getElementById return null in java script file (also while testing in console) but work in html file
HTML file
<!DOCTYPE html>
<html>
<head>
<title>Title</title>
<link rel="stylesheet" href="css/style.css">
<script src="js/app.js"></script>
</head>
<body>
<p id="stuff">Some text</p>
</body>
</html>
JS file
var title = document.getElementById('stuff');
console.log(title);
title.style.color = "#D4F34A";
You can add a callback function for the document event DOMContentLoaded event like so, and inside that function do your desired code:
//Add this into your script file, and anything you want to have execute once the document
//is fully loaded go inside of the function
document.addEventListener("DOMContentLoaded", function(event) {
var title = document.getElementById('stuff');
console.log(title);
title.style.color = "#D4F34A";
});
This question already has answers here:
Javascript Excel OpenFile
(2 answers)
Closed 5 years ago.
I want to open a excel document while loading a web page but i don't know how. I tried this:
<script>
function myFunction() {
window.open("file:///D://Files/doc.xlsx");
}
</script>
<body onload="myFunction()">
</body>
But it didn't work. I want to mention that it has to be done for IE8 and less.
Add tag <script> to <head>
<head>
<script>
function myFunction() {
window.open("file:///D://Files/doc.xlsx");
}
</script>
</head>
<body onload="myFunction()">
</body>
This question already has answers here:
Why isn't my JavaScript working in JSFiddle?
(7 answers)
Closed 6 years ago.
This works:
<html>
<script type="text/javascript">
function lala() {
console.log("lala");
}
</script>
<body>
<button onclick="lala()">lala</button>
</body>
</html>
But having that in jsfiddle works not:
<button onclick="lala()">lala</button>
function lala() {
console.log("lala");
}
https://jsfiddle.net/clankill3r/715kha38/
Uncaught ReferenceError: lala is not defined
I saw some old answers on stackoverflow regarding this problem but those seem to be invalid those days.
Please change Load type in java script section select
No wrap - in <head>
This question already has answers here:
$(document).ready equivalent without jQuery
(39 answers)
Closed 8 years ago.
I have the following code
<html>
<head>
<script>
document.getElementById("txt").innerHTML = "Hello";
</script>
</head>
<body>
<div id="txt"></div>
</body>
</html>
and of course the text "Hello" isn't displayed because it's before the div. However because i use egl i can put js code only on head.
Is there any way to fix this?
You need to wait for your page to be ready before your code can execute on markup in the page. For example, use window.onload handler as in the example below. There are nicer ways to do this such as jQuery methods, but this will serve as an example of what you need.
<html>
<head>
<script>
window.onload = function ()
{
document.getElementById("txt").innerHTML = "Hello";
}
</script>
</head>
<body>
<div id="txt"></div>
</body>
</html>