Sometimes, we want to validate select box with JavaScript.

In this article, we’ll look at how to validate select box with JavaScript.

How to validate select box with JavaScript?

To validate select box with JavaScript, we check if the select element’s value property is set.

For instance, we write

<select id="select" required="required">
  <option value="">Choose an option</option>
  <option value="option1">Option1</option>
  <option value="option2">Option2</option>
  <option value="option3">Option3</option>
</select>

to add a select drop down.

Then we write

const select = document.getElementById("select");
if (select.value) {
  // ...
}

to select the select element with getElementById.

Then we check for the select element’s value with select.value.

Conclusion

To validate select box with JavaScript, we check if the select element’s value property is set.