[英]How to fire the ajax request with same post parameter when browser back button is pressed?
[英]localStorage parameter undefined when back button is pressed
我有3頁。
從“類別頁面”到“電影列表”,我將單擊事件並將類別ID存儲到localStorage中,然后再將頁面更改為“電影列表”。
$(document).on('click', 'a', function(event, ui) {
var data_id = $(this).attr('id');
// store some data
if (typeof(Storage) !== "undefined") {
localStorage.category = data_id;
}
// Change page
$.mobile.changePage("#movelist");
});
從“電影列表”到“電影詳細信息”,我將電影ID添加到localStorage並將頁面更改為“電影詳細信息”。
$(document).on('click', 'li', function() {
if (typeof(Storage) !== "undefined") {
localStorage.movie_id= $(this).attr("id");
console.log(localStorage.category);
}
$.mobile.changePage("#movie-details");
});
我面臨的問題是,當從“電影詳細信息”頁面上按下后退按鈕時,“電影列表”頁面為空,因為localStorage中的類別ID變為“未定義”。
$(document).on('pagebeforeshow', '#movielist', function() {
//empty list to prevent duplicates
$('#movie-list').empty();
//get attractions JSON and populate list based on category
$.getJSON("./json/movielist.json", function(data) {
$.each(data, function(key, val) {
if (val.category == localStorage.category) {
$('#movie-list').append("<li id='" + val.id + "' class='ui-li-has-thumb ui-first-child'><a class='ui-btn ui-btn-icon-right ui-icon-carat-r'><img src='" + val.image +
"' class='thumbnail'/><h2>" +
val.name + "</h2></a></li>");
}
});
});
});
問題1:按下后退按鈕會清除localStorage數據嗎? 為什么?
問題2:如何確保保留類別,以便仍可以加載我的電影列表?
感謝所有給予的幫助。 謝謝。
$(document).on('click', 'a', function(event, ui) {
var data_id = $(this).attr('id');
// store some data
if (typeof(Storage) !== "undefined") {
localStorage.setItem('category', data_id);
}
// Change page
$.mobile.changePage("#movelist");
});
$(document).on('click', 'li', function() {
if (typeof(Storage) !== "undefined") {
localStorage.setItem('movie_id', $(this).attr("id"));
console.log(localStorage.getItem('category'));
}
$.mobile.changePage("#movie-details");
});
$(document).on('pagebeforeshow', '#movielist', function() {
//empty list to prevent duplicates
$('#movie-list').empty();
//get attractions JSON and populate list based on category
$.getJSON("./json/movielist.json", function(data) {
$.each(data, function(key, val) {
if (val.category == localStorage.getItem('category')) {
$('#movie-list').append("<li id='" + val.id + "' class='ui-li-has-thumb ui-first-child'><a class='ui-btn ui-btn-icon-right ui-icon-carat-r'><img src='" + val.image +
"' class='thumbnail'/><h2>" +
val.name + "</h2></a></li>");
}
});
});
});
https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage
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