The task is to select the elements with id by using the shorthand for document.getElementById() with the help of JavaScript. we’re going to discuss a few techniques.
Approach 1:
- Define a function that returns the document.getElementById(‘idName’).
- This method takes IDName as the first and only argument.
- Call the method with ID as the argument.
Example: In this example, a function is created which returns the document.getElementById(‘idName’).
html
<!DOCTYPE html><html lang="en">
<head>
<title>
Write Shorthand for document.getElementById()
method in JavaScript
</title>
</head>
<body>
<h1 style="color:green;">
GeeksforGeeks
</h1>
<p>
Click on the button to select the
element by shorthand instead of
getElementById
</p>
<button onclick="GFG_Fun()">
click here
</button>
<p id="result"></p>
<script>
let ID = function (elementId) {
return document.getElementById(elementId);
};
let res = ID("result");
function GFG_Fun() {
res.innerHTML = "Element selected by "
+ "shorthand of getElementById";
}
</script>
</body>
</html>
|
Output:
How to write shorthand for document.getElementById() method in JavaScript ?
Approach 2:
- Define a prototype = document.getElementById.
- Use this prototype by passing IDName as the first and only argument in-place of document.getElementById.
Example: In this example, a HTMLDocument Prototype is created which then used to select the element by IDName.
html
<!DOCTYPE html><html lang="en">
<head>
<title>
Write Shorthand for document.getElementById()
method in JavaScript
</title>
</head>
<body>
<h1 style="color:green;">
GeeksforGeeks
</h1>
<p>
Click on the button to select the
element by shorthand instead of
getElementById
</p>
<button onclick="GFG_Fun()">
click here
</button>
<p id="result"></p>
<script>
HTMLDocument.prototype.e = document.getElementById;
let res = document.e("result");
function GFG_Fun() {
res.innerHTML = "Element selected by "
+ "shorthand of getElementById";
}
</script>
</body>
</html>
|
Output:
How to write shorthand for document.getElementById() method in JavaScript ?