HTML DOM Input Radio object-HTML Tutorial-php.cn

HTML DOM Input Radio object

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Release： 2023-08-30 13:45:02

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The HTML DOM input radio object is associated with a element of type "radio". We can create and access input elements with radio type using createElement() and getElementById() methods respectively.

Properties

The following are the properties of the input Radio object- p>

Sr.No	Properties and Description
1	Autofocus Sets or returns whether the radio button is automatically acquired when the page loads focus. p>
2	Selected Set or return the radio button selected state
3	defaultChecked Returns the attribute default value of the selected radio button
4	defaultValue Set or return the radio button default value.
5	Disable p> Sets or returns whether the radio button is disabled
6	Form Returns a reference to the form containing the radio buttons
7	Name Sets or returns the name attribute value of the radio button.
Required Sets or returns whether to force check radio before submitting the form button.
9	Type Returns the form element type of the radio button.
10	Value Sets or returns the value property of the radio button.

Syntax

The following is the syntax -

Create an input radio object.

var R = document.createElement(&ldquo;INPUT");
R.setAttribute("type", "radio");

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Example

Let's look at an example of inputting a radio selection object -

Live Demonstration

<!DOCTYPE html>
<html>
<head>
<script>
   function createRadio() {
      var R = document.createElement("INPUT");
      R.setAttribute("type", "Radio");
      document.body.appendChild(R);
   }
</script>
</head>
<body>
<h1>Input radio object</h1>
<p>Create an input field with type radio by clicking the below button</p>
<button type=&rdquo;button&rdquo; onclick="createRadio()">CREATE</button>
<br><br>
Mango:
</body>
</html>

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Output

This will produce The following output −

HTML DOM Input Radio 对象

Click the CREATE button −

HTML DOM Input Radio 对象

In the above example −

we A button named CREATE is created, and when the user clicks, the createRadio() method will be executed −

<button type=&rdquo;button&rdquo; onclick="createRadio()">CREATE</button>

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The createRadio() method uses the createElement() method of the document object to create it by passing "INPUT" as a parameter element. The newly created input element is assigned to the variable R and using the setAttribute() method we create a type attribute with a value radio.

Remember, setAttribute() creates an attribute and assigns a value if the attribute does not previously exist. Finally, using the appendChild() method on the document body, we append an input element of type radio as a child element of the body -

function createPASS() {
   var R = document.createElement("INPUT");
   R.setAttribute("type", "Radio");
   document.body.appendChild(R);
}

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