H5新特性監聽手機的返回鍵

var hiddenProperty ='hidden' in document ? 'hidden' :'webkitHidden' in document ? 'webkitHidden' : 'mozHidden' in document ? 'mozHidden' : null;
var visibilityChangeEvent = hiddenProperty.replace(/hidden/i,'visibilitychange');
var onVisibilityChange = function () {
if (document[hiddenProperty]) {
console.log('頁面非激活');
} else {
console.log('頁面激活' )
}
}
document.addEventListener(visibilityChangeEvent, onVisibilityChange);

這段代碼的原理我個人理解就是通過判斷用戶瀏覽的是否為當前頁，從而進行相關操作。