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Get ID or value of a checkbox onclick of that checkbox in pure... Fires function OptionSelected() Gets ID of that checkbox. Performs a bitwise operation based on that ID.

Input Checkbox value Property Return the value of the value attribute of a checkbox: getElementById("myCheck"). value; Change the value associated with the checkbox: document. getElementById("myCheck"). ... Submitting a form - how to change the value associated with the checkbox: document. getElementById("myCheck").

In JavaScript, we can access the checkbox element using id, class, or tag name and apply '. checked' to the element, which returns either true or false based on the checkbox is checked.

Different JavaScript codes to get marked checkboxes value <script> document.getElementById('btn').onclick = function() { var markedCheckbox = document.getElementsByName('pl'); for (var checkbox of markedCheckbox) { if (checkbox.checked) document.body.append(checkbox.value + ' '); } }

The value attribute on the checkbox is used when the form is interacting with a server. So when you set the value as lettuce, that means when the form is submitted and that box is checked, the value it sends back to the server is topping=lettuce .

JavaScript function to get selected (checked) CheckBox Row values of Html Table <script type="text/javascript"> var grid = document. getElementById("Table1"); var checkBoxes = grid. getElementsByTagName("INPUT"); var message = "Id Name Country\n"; for (var i = 0; i < checkBoxes.length; i++) {

Input Checkbox value Property Return the value of the value attribute of a checkbox: getElementById("myCheck"). value; ... Change the value associated with the checkbox: getElementById("myCheck"). value = "newCheckboxValue"; ... Submitting a form - how to change the value associated with the checkbox: getElementById("myCheck").