Input Checkbox required Property - Javascript DOM HTML Element

Javascript examples for DOM HTML Element:Input Checkbox

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Description

The required property sets or gets whether a checkbox must be checked before submitting a form.

This property reflects the HTML required attribute.

Set the required property with the following Values

Value Description
true|false Sets whether a checkbox should be checked before submitting a form
  • true - The checkbox must be checked before submitting a form
  • false - Default. The checkbox is not a required

Return Value

A Boolean, returns true if the checkbox must be checked before submitting a form, otherwise it returns false

The following code shows how to check if a checkbox must be checked before submitting a form:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<body>

<form action="#">
  Checkbox: <input type="checkbox" id="myCheck" name="test">
  <input type="submit">
</form>//from   w  ww  .  ja  va  2 s. c o  m

<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
function myFunction() {
    var v = document.getElementById("myCheck").required;
    document.getElementById("demo").innerHTML = v;
}
</script>

</body>
</html>

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