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;

document.getElementById("myCheckbox").checked = false;

To check or uncheck a checkbox or a radio button, use the checked property:

To check:

document.getElementById("myCheckbox").checked = true;

document.getElementById("myCheckbox").checked = false;

To check or uncheck a checkbox or a radio button, use the checked property:

To check:

document.getElementById("myCheckbox").checked = true;

document.getElementById("myCheckbox").checked = false;