Given an input text area and the task is to transform the lowercase characters into uppercase characters while taking input from user. It can be done using CSS or JavaScript. The first approach uses CSS transform property and the second approach uses JavaScript to convert the lowercase character to upper case character.
Approach 1: This approach uses CSS text-transform property to transform the lowercase characters into uppercase characters while taking input from the user.
Example: This example implements the above approach.
<!DOCTYPE HTML> <html>
<head>
<title>
How to change Input character
to Upper Case while typing
using CSS/JavaScript ?
</title>
</head>
<body style = "text-align:center;">
<h1 style = "color: green">
GeeksForGeeks
</h1>
<p id = "GFG_UP" style =
"font-size: 20px; font-weight: bold;">
Type in the input box in lower
case to see the effect.
</p>
Type Here: <input id="yourid" style="text-transform: uppercase"
type="text" />
<br><br>
<p id = "GFG_DOWN" style = "color:green;
font-size: 26px; font-weight: bold;">
</p>
</body>
</html>
|
Output:
-
Before typing in input box:
-
After typing lowercase letters in input box:
Approach 2:
- Use keyup() method to trigger the keyup event when user releases the key from keyboard.
- Use toLocaleUpperCase() method to transform the input to uppercase and again set it to the input element.
Example: This example implements the above approach.
<!DOCTYPE HTML> <html>
<head>
<title>
How to change Input character
to Upper Case while typing
using CSS/JavaScript ?
</title>
<script src=
</script>
</head>
<body style = "text-align:center;">
<h1 style = "color: green">
GeeksForGeeks
</h1>
<p id = "GFG_UP" style =
"font-size: 20px; font-weight: bold;">
Type in the input box in lower
case to see the effect.
</p>
Type Here: <input id="yourid" type="text" />
<br><br>
<script>
$(function() {
$('input').keyup(function() {
this.value = this.value.toLocaleUpperCase();
});
});
</script>
</body>
</html>
|
Output:
-
Before typing in input box:
-
After typing lowercase letters in input box: