getjson

A demo i only want to use jquery $.getJSON function,but now i must import jquery, so i want to use native javascript write jquery $.getJSON function. My Code is: var $={ getJSON: function(url, params, callback){ var reqUrl = url; var xhr = new XMLHttpRequest; xhr.onreadystatechange = function() { if (xhr.readyState == 4 && xhr.status == 200) { JSON.parse(xhr.responseText); } } xhr.open("GET", reqUrl); xhr.send(); } }; use chrome show: XMLHttpRequest cannot load xxxx Origin xx is not allowed by Access-Control-Allow-Origin. who can help me? Make an ajax request and use JSON.parse on the result.

Promise 背景 javascript语言的一大特点就是 单线程 ，在某个特定的时刻只有特定的代码能够被执行，并阻塞其它的代码，也就是说，同一个时间只能做一件事。 怎么做到异步编程？回调函数。直到nodejs的出现，开始将回调模式的异步编程机制发挥的淋漓尽致，这种机制开始在前端变得非常流行，但是慢慢也体现出了回调函数在 错误处理 和 嵌套 上的副作用。 因为存在上面的不足，所以异步解决方案一直在发展中，从 callback => promise => generator => async/await => rx => ..... 简单了解event loop +javascript上， 所有同步任务都在主线程上执行，也可以理解为存在一个“ 执行栈 ”。 主线程外，还有一个“ 任务队列 ”，任务队列的作用，就在等待异步任务的结果，只要异步任务有了运行结果，就会加入到“任务队列”中。 一旦 执行栈 中所有同步任务执行完毕，就从 任务队列 中读取“任务”加入到“执行栈”中。 主线程不断的在循环上面的步骤。 (function() { console.log('这是开始'); setTimeout(function cb() { console.log('这是来自第一个回调的消息'); setTimeout(function cb3() { console.log(

I am going to send a array of json object through jquery ajax call to a php file. var arr = new Array(); var record1 = {'a':'1','b':'2','c':'3'}; var record2 = {'d':'4','e':'5','f':'6'}; arr.push(record1); arr.push(record2); How can I send the array through jquery ajax? and how can I get the values in php? Thanks. $.ajax({ url: "api", type: "POST", dataType: 'json', data: JSON.stringify(arr), success: function(response){} }); And with PHP: $strRequest = file_get_contents('php://input'); $Request = json_decode($strRequest); I think JSON.stringify() might be useful. or, you can use json_decode()

$.ajaxSettings.async = false;//同步请求 $.getJSON(url, data, function(data){ }); $.ajaxSettings.async = true;//恢复异步 来源： https://www.cnblogs.com/Cengjianwei/p/11844470.html

I have been trying to solve this problem for hours (searched here as well but none of the solutions worked) so I had no other option but to hope for someone to tell me why this is happening and how can I fix it. This is a simple code that works with Firefox but not with IE9 (don't have other versions) Example code is here: http://jsfiddle.net/z5b2J/ Source is this one: $.ajax({ url: "http://query.yahooapis.com/v1/public/yql?q=select%20script%20from%20html%20where%20url%3D%27https%3A%2F%2Ftesting.website.com%2F%3Fcid%3D48hgfd45430DD%26id%3D4830F8CF0454312%27&format=json&diagnostics=true&_maxage

I am using jQuery.getJSON to fetch the Facebook friends list, but I am not getting it. It works perfectly in Firefox and Chrome, but it is not working in Internet Explorer 8. jQuery.getJSON("https://graph.facebook.com/me/friends?access_token="+aToken, function(data) { alert(data); } ); Also after doing a little more research I tried with this code also: jQuery.ajax({ url:"https://graph.facebook.com/me/friends?access_token="+aToken, type: 'json', success: function(json) { alert(json); } }); leomeurer Try this to handle the error: jQuery.getJSON("https://graph.facebook.com/me/friends?access