Javascript jQuery getJSON每个会话仅一次
我正在获取当前类似Facebook的计数,代码如下:Javascript jQuery getJSON每个会话仅一次,javascript,jquery,ajax,session,getjson,Javascript,Jquery,Ajax,Session,Getjson,我正在获取当前类似Facebook的计数,代码如下: $(document).ready(function() { $.getJSON('https://graph.facebook.com/<username>?callback=?', function(data) { var fb_count = data['likes'].toString(); $('#fb_count').html(fb_count); }); }); $(
$(document).ready(function() {
$.getJSON('https://graph.facebook.com/<username>?callback=?', function(data) {
var fb_count = data['likes'].toString();
$('#fb_count').html(fb_count);
});
});
$(文档).ready(函数(){
$.getJSON('https://graph.facebook.com/?callback=?,函数(数据){
var fb_count=data['likes'].toString();
$('fb#u count').html(fb#u count);
});
});
但是,当用户浏览页面时,会再次发送请求。是否有一种方法可以在每个会话中只提取一次数据,并在用户关闭浏览器之前将提取的值保留在HTML元素中,而无需新的请求
谢谢你的帮助 是的,您可以使用
HTML5 localstorage
下面的代码可以帮助您
$(document).ready(function() {
if(typeof(Storage)!=="undefined" && localStorage.fb_count)
{
$('#fb_count').html(localStorage.fb_count);
}
else{
$.getJSON('https://graph.facebook.com/<username>?callback=?', function(data) {
var fb_count = data['likes'].toString();
$('#fb_count').html(fb_count);
if(typeof(Storage)!=="undefined")
localStorage.fb_count=fb_count;
});
}
});
$(文档).ready(函数(){
if(类型(存储)!=“未定义”&&localStorage.fb\u计数)
{
$('#fb_count').html(localStorage.fb_count);
}
否则{
$.getJSON('https://graph.facebook.com/?callback=?,函数(数据){
var fb_count=data['likes'].toString();
$('fb#u count').html(fb#u count);
if(类型(存储)!=“未定义”)
localStorage.fb_count=fb_count;
});
}
});
阅读
是的,你可以使用HTML5本地存储 下面的代码可以帮助您
$(document).ready(function() {
if(typeof(Storage)!=="undefined" && localStorage.fb_count)
{
$('#fb_count').html(localStorage.fb_count);
}
else{
$.getJSON('https://graph.facebook.com/<username>?callback=?', function(data) {
var fb_count = data['likes'].toString();
$('#fb_count').html(fb_count);
if(typeof(Storage)!=="undefined")
localStorage.fb_count=fb_count;
});
}
});
$(文档).ready(函数(){
if(类型(存储)!=“未定义”&&localStorage.fb\u计数)
{
$('#fb_count').html(localStorage.fb_count);
}
否则{
$.getJSON('https://graph.facebook.com/?callback=?,函数(数据){
var fb_count=data['likes'].toString();
$('fb#u count').html(fb#u count);
if(类型(存储)!=“未定义”)
localStorage.fb_count=fb_count;
});
}
});
阅读
您可以将计数存储在cookie中,并在请求之前检查cookie是否存在 ()
if($.cookie(“likeCount”)==null){
$.getJSON('https://graph.facebook.com/?callback=?,函数(数据){
var fb_count=data['likes'].toString();
$.cookie(“likeCount”,fb\u计数);
$('fb#u count').html(fb#u count);
});
}
其他的
$('fb#u count').html($.cookie(“likeCount”));
[注意:未测试代码]您可以将计数存储在cookie中,并在请求之前检查cookie是否存在
var _facebooker = new function() {
var url = 'https://graph.facebook.com/<username>?callback=?',
threshold = 3,
sKey = "_facebooker",
mode = (window.localStorage ? "storage" : "jcookie");
function getData(){
var data = {};
if (mode === "jcookie")
data = JSON.pase($.cookie(sKey));
else
data = JSON.parse(localStorage.getItem(sKey));
if (typeof data.expired\s == "undefined" || data.expires <= new Date())
return getNewData();
else
return data;
}
function setData(d){
if (mode === "jcookie")
$.cookie(sKey, JSON.stringify(d));
else
localStorage.setItem(sKey, JSON.stringify(d));
return d;
}
function getNewData(){
var data = {};
$.getJSON(url, function(d){
data = {
likeCount: d['likes'],
expires: new Date((new Date()).getTime() + threshold * 60000)
};
setData(data);
});
return data;
}
function getLikeCount(){
return getData().likeCount;
}
return {
"getLikeCount" : getLikeCount
}
}
$(document).ready(function() {
$('#fb_count').html(_facebooker.getLikeCount());
}
()
if($.cookie(“likeCount”)==null){
$.getJSON('https://graph.facebook.com/?callback=?,函数(数据){
var fb_count=data['likes'].toString();
$.cookie(“likeCount”,fb\u计数);
$('fb#u count').html(fb#u count);
});
}
其他的
$('fb#u count').html($.cookie(“likeCount”));
[注意:代码未测试]var\u facebooker=new function(){
var _facebooker = new function() {
var url = 'https://graph.facebook.com/<username>?callback=?',
threshold = 3,
sKey = "_facebooker",
mode = (window.localStorage ? "storage" : "jcookie");
function getData(){
var data = {};
if (mode === "jcookie")
data = JSON.pase($.cookie(sKey));
else
data = JSON.parse(localStorage.getItem(sKey));
if (typeof data.expired\s == "undefined" || data.expires <= new Date())
return getNewData();
else
return data;
}
function setData(d){
if (mode === "jcookie")
$.cookie(sKey, JSON.stringify(d));
else
localStorage.setItem(sKey, JSON.stringify(d));
return d;
}
function getNewData(){
var data = {};
$.getJSON(url, function(d){
data = {
likeCount: d['likes'],
expires: new Date((new Date()).getTime() + threshold * 60000)
};
setData(data);
});
return data;
}
function getLikeCount(){
return getData().likeCount;
}
return {
"getLikeCount" : getLikeCount
}
}
$(document).ready(function() {
$('#fb_count').html(_facebooker.getLikeCount());
}
var url='1〕https://graph.facebook.com/?callback=?',
阈值=3,
sKey=“_facebooker”,
模式=(window.localStorage?“存储”:“jcookie”);
函数getData(){
变量数据={};
如果(模式==“jcookie”)
data=JSON.pase($.cookie(sKey));
其他的
data=JSON.parse(localStorage.getItem(sKey));
if(typeof data.expired\s==“undefined”| | data.expiresvar\u facebook=new function(){
var url='1〕https://graph.facebook.com/?callback=?',
阈值=3,
sKey=“_facebooker”,
模式=(window.localStorage?“存储”:“jcookie”);
函数getData(){
变量数据={};
如果(模式==“jcookie”)
data=JSON.pase($.cookie(sKey));
其他的
data=JSON.parse(localStorage.getItem(sKey));
如果(数据类型。过期\s==“未定义”| | data.expires应该是sessionStorage而不是localStorage,因为他希望数据只在浏览器关闭之前保留sessionStorage将在浏览器关闭之前重置。应该是sessionStorage而不是localStorage,因为他希望数据只在浏览器关闭之前保留sessionStorage将在浏览器关闭之前重置s