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To get the checkbox value in JavaScript, you can use the ?document. querySelectorAll()? method to select the specified checkboxes or the ?document. getElementById? method to get the ?id? against each of the selected checkboxes and display its corresponding value.

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 + ' '); } }

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++) {

Add the below code in your ts file: isChecked: boolean = false; // Boolean flag. doSomething(){ if(this. isChecked==true){ console. log('checkbox is checked'); console. log('checkbox is unchecked');

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").

The validation of the checkbox in javascript can be done using the checked property of the checkbox element. This property returns true when the checkbox is selected. The addEventListener() method can be used to apply the change event to the checkbox to validate whenever the user interacts with the checkbox.

You can also use the below code to get all checked checkboxes values. <script> document.getElementById('btn').onclick = function() { var markedCheckbox = document.querySelectorAll('input[type="checkbox"]:checked'); for (var checkbox of markedCheckbox) { document.body.append(checkbox.value + ' '); } } </script>

The DOM Input Checkbox Property is used to set or return the checked status of a checkbox field. This property is used to reflect the HTML Checked attribute. Syntax: It is used to return the checked property.