How to Check/Uncheck checkbox with JavaScript?
Use the GetElementById property and assign the checked is true for Check or false for Uncheck checkbox in JavaScript. You can easily modify it based on your conditions and requirements.
document.getElementById("checkBoxID").checked = true;
document.getElementById("checkBoxID").checked = false;
Example of JavaScript set checkbox checked
Here is HTML example code.
<!DOCTYPE html>
<html>
<body>
<body>
<input id="checkbox1" type="checkbox" checked="" name="copy1">Check</input>
<input id="checkbox2" type="checkbox" checked="true" name="copy1" value="Auto UnCheck">UnCheck</input>
</body>
<script language="javascript">
document.getElementById("checkbox1").checked = true;
document.getElementById("checkbox2").checked = false;
</script>
</script>
</body>
</html>
Output:
Do comment if you have questions or doubts on this topic. You can also give suggestions and example.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version