html - How do you automatically set text box to Uppercase?

Html - How do you automatically set text box to Uppercase?

You can automatically set the text entered into a text box to uppercase using JavaScript. You can achieve this by attaching an event listener to the text box and converting the input to uppercase within the event handler. Here's an example:

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Uppercase Text Box</title> <style> /* Optional: Add some styling to the text box */ input { padding: 5px; } </style> </head> <body> <!-- Text Box --> <label for="uppercaseInput">Enter text: </label> <input type="text" id="uppercaseInput"> <!-- Your JavaScript code --> <script> // Get the text box element var textbox = document.getElementById('uppercaseInput'); // Add an input event listener to the text box textbox.addEventListener('input', function() { // Convert the entered text to uppercase this.value = this.value.toUpperCase(); }); </script> </body> </html>

In this example:

  • The input element has an id of "uppercaseInput" for identification.
  • The JavaScript code uses getElementById to get the text box element.
  • An event listener is added to the text box, listening for the input event (whenever the user types).
  • In the event handler, toUpperCase() is used to convert the entered text to uppercase.
  • The converted text is then set back as the value of the text box.

This way, any text entered into the text box will be automatically converted to uppercase as the user types.

Examples

  1. "HTML uppercase input field on input"

    • Code Implementation:
      <input type="text" oninput="this.value = this.value.toUpperCase()">
    • Description: Converts input text to uppercase automatically as the user types using the oninput event.

  2. "CSS text-transform uppercase for input field"

    • Code Implementation:
      <style> input.uppercase { text-transform: uppercase; } </style> <input type="text" class="uppercase">
    • Description: Applies CSS text-transform: uppercase to the input field, making all entered text uppercase.

  3. "JavaScript toUpperCase on focus out"

    • Code Implementation:
      <input type="text" onblur="this.value = this.value.toUpperCase()">
    • Description: Converts input text to uppercase when the input field loses focus using the onblur event.

  4. "Angular input uppercase directive"

    • Code Implementation:
      import { Directive, HostListener, ElementRef } from '@angular/core'; @Directive({ selector: 'input[uppercase]' }) export class UppercaseDirective { constructor(private el: ElementRef) {} @HostListener('input') onInput() { this.el.nativeElement.value = this.el.nativeElement.value.toUpperCase(); } } 
      <input type="text" uppercase>
    • Description: Creates an Angular directive to automatically set the input field to uppercase on input.

  5. "React uppercase input on change"

    • Code Implementation:
      import React, { useState } from 'react'; function UppercaseInput() { const [value, setValue] = useState(''); const handleInputChange = (e) => { setValue(e.target.value.toUpperCase()); }; return <input type="text" value={value} onChange={handleInputChange} />; }
    • Description: Uses React state to manage the input value and converts it to uppercase on each change.

  6. "Vue.js input directive for uppercase"

    • Code Implementation:
      <template> <input v-uppercase v-model="inputValue"> </template> <script> export default { data() { return { inputValue: '' }; }, directives: { uppercase: { update(el) { el.value = el.value.toUpperCase(); } } } }; </script>
    • Description: Implements a Vue.js directive to automatically set the input field to uppercase.

  7. "jQuery input uppercase on keyup"

    • Code Implementation:
      <script src="https://code.jquery.com/jquery-3.6.4.min.js"></script> <input type="text" id="uppercase-input"> <script> $(document).ready(function() { $('#uppercase-input').on('keyup', function() { $(this).val($(this).val().toUpperCase()); }); }); </script>
    • Description: Uses jQuery to convert input text to uppercase on the keyup event.

  8. "HTML5 pattern attribute for uppercase"

    • Code Implementation:
      <input type="text" pattern="[A-Za-z]+" title="Only uppercase letters are allowed" required>
    • Description: Utilizes the HTML5 pattern attribute to restrict input to uppercase letters only.

  9. "Bootstrap input field uppercase"

    • Code Implementation:
      <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"> <input type="text" class="form-control text-uppercase">
    • Description: Applies the Bootstrap class text-uppercase to the input field for automatic uppercase styling.

  10. "HTML autofocus with uppercase"

    • Code Implementation:
      <input type="text" autofocus oninput="this.value = this.value.toUpperCase()">
    • Description: Sets autofocus on the input field and converts entered text to uppercase as the user types.

More Tags

android-4.2-jelly-bean scenarios postgresql-9.4 benchmarking podfile react-state-management spring-config calculated-field spring-boot-maven-plugin virtualization

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