JS 禁止頁面刷新 右鍵 或 F5

// 禁止f5刷新
document.onkeydown = function (e) {
    let ev = window.event || e
    let code = ev.keyCode || ev.which
    if (code == 116) {
        ev.keyCode ? ev.keyCode = 0 : ev.which = 0
        cancelBubble = true
        return false
    }
}

// 禁止右鍵刷新
document.οncοntextmenu = function () { return false }