Javascript DOM HTML Select multiple Property set

Introduction

Allow multiple selection in a drop-down list:

document.getElementById("mySelect").multiple = true;

Click the button to allow multiple selection.

Hold Ctrl or Shift to select more than one option.

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<!DOCTYPE html>
<html>
<body>

<form>
  <select id="mySelect" size="4">
    <option>Apple</option>
    <option>Pear</option>
    <option>Banana</option>
    <option>Orange</option>
  </select>
</form>/*from  w  w w.j  a v a  2  s.co m*/

<button type="button" onclick="myFunction()">Test</button>
<p id="demo"></p>

<script>
function myFunction() {
  document.getElementById("mySelect").multiple = true;
  document.getElementById("demo").innerHTML = "You can now select multiple options.";
}
</script>

</body>
</html>

The multiple property sets or gets whether more than one item can be selected from a drop-down list.

The multiple property accepts and returns a boolean type value,

Property Values

Value	Description
true	Multiple selection is allowed
false	Default. Multiple selection is not allowed

The multiple property returns true if multiple selection in the drop-down list is enabled, otherwise it returns false.

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Javascript DOM HTML Select multiple Property set

Introduction

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