How do I determine if a checkbox is checked in JavaScript?

Question

I have been trying to experiment in JavaScript and I want to know how can I get an alert on my window saying that the checkbox has been checked. I want it in plain JavaScript.

Answer 1

Here is an example using plain javascript of how can you check:
Body:

<label>

<input id="checkboxcheck" type="checkbox" >checkbox

</label>

<button onclick="Function()">

Check value

</button>

Script:

function Function() {

  var variable = document.getElementById("checkboxcheck").checked;

  alert(variable);

}

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