👋 Hello! I'm Alphonsio the robot. Ask me a question, I'll try to answer.
How to check / uncheck a checkbox input in pure JavaScript ?
To check or uncheck a checkbox or a radio button, use the checked property of the concerned element by assigning a boolean value (true or false) :
To check:
document.getElementById("myCheckbox").checked = true;
To uncheck:
document.getElementById("myCheckbox").checked = false;