¿Marcar/desmarcar casilla con JavaScript (jQuery o Vanilla)?

// Check
document.getElementById("checkbox").checked = true;

// Uncheck
document.getElementById("checkbox").checked = false;

// Check
$("#checkbox").prop("checked", true);

// Uncheck
$("#checkbox").prop("checked", false);

// Check
$("#checkbox").attr("checked", true);

// Uncheck
$("#checkbox").attr("checked", false);

document.getElementById("id-of-checkbox").checked = true;

document.getElementById("id-of-checkbox").checked = false;

$('id of the checkbox')[0].checked = true

$('id of the checkbox')[0].checked = false