Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
HTML DOM Input Checkbox Object
The HTML DOM Input Checkbox Object represents an input HTML element with type checkbox.
Syntax
Following is the syntax −
- Creating an <input> with type checkbox
var checkboxObject = document.createElement(“input”); checkboxObject.type = “checkbox”;
Attributes
Here, “checkboxObject” can have the following attributes −
| Attributes | Description |
|---|---|
| autofocus | It defines if the checkbox should be focused on initial page load. |
| checked | It defines the state of checkbox i.e. checked/unchecked. |
| defaultChecked | It returns the default value of checked attribute i.e. true/false |
| defaultValue | It sets/returns the default value of checkbox |
| disabled | It defines if checkbox is disabled/enabled |
| form | It returns a reference of enclosing form that contains the checkbox |
| indeterminate | It sets/returns indeterminate state of checkbox |
| name | It defines the value of name attribute of a checkbox |
| required | It defines if the checkbox is compulsory to be checked in order to submit the form |
| type | It returns the type of form element of checkbox |
| value | It defines the value of the value attribute of a checkbox |
Example
Let us see an example of Input Checkbox value property −
<!DOCTYPE html>
<html>
<head>
<title>Value Attribute of Checkbox</title>
</head>
<body>
<form id="Form">
<div>
Color-Red: <input value="Green" id="formCheckbox" type="checkbox" name="formCheckbox">
</div>
</form>
<button onclick="changeType()">Change value of input checkbox</button>
<div id="displayDiv"></div>
<script>
var valueOfInput = document.getElementById("formCheckbox");
var displayDiv = document.getElementById("displayDiv");
displayDiv.textContent = 'Value: ' + valueOfInput.value;
function changeType(){
if(valueOfInput.value == 'Green' && valueOfInput.checked == true){
valueOfInput.value = 'Red' displayDiv.textContent = 'value: ' + valueOfInput.value;
} else {
displayDiv.textContent = 'Check the checkbox to change value to red';
}
}
</script>
</body>
</html>Output
This will produce the following output −
Before clicking ‘Change value of input checkbox’ button −
After clicking ‘Change value of input checkbox’ button −
Checked ‘Color-Red’ checkbox & clicking ‘Change value of input checkbox’ button −
Updated on: 30-Jul-2019
310 Views
Advertisements