Javascript 未捕获的SyntaxError:意外标记：在chrome和“上”；语法错误：缺少；“在声明之前”；在firefox上_Javascript_Jquery_Ajax

Javascript 未捕获的SyntaxError:意外标记：在chrome和“上”；语法错误：缺少；“在声明之前”；在firefox上

javascript jquery ajax

Javascript 未捕获的SyntaxError:意外标记：在chrome和“上”；语法错误：缺少；“在声明之前”；在firefox上,javascript,jquery,ajax,Javascript,Jquery,Ajax,我的代码是： function getCategoryResponse() { var appid = "1"; $.ajax({ type: 'GET', url: 'http://itunes.apple.com/WebObjects/MZStoreServices.woa/ws/genres?id=36&callback=myCallbackFunction', data: {}, dataType:

我的代码是：

function getCategoryResponse() {
    var appid = "1";
    $.ajax({
        type: 'GET',
        url: 'http://itunes.apple.com/WebObjects/MZStoreServices.woa/ws/genres?id=36&callback=myCallbackFunction',
        data: {},
        dataType: 'jsonp',
        success: function (data) {
            var appData = data.results[0]; //get first record from array            
            console.log(appData);
            return;
        },
        error: function () {
            //alert('something bad happened');
            console.log("something bad happened");
        }
    });
}

其结果是：

"Uncaught SyntaxError: Unexpected token :" /* on chrome  */

"SyntaxError: missing ; before statement" /* on firefox */

该URL不返回JSONP响应，只返回如下启动的JSON响应：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

您必须查阅文档，了解如何告诉它您需要JSONP，它的开头是这样的：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

另外：在使用jQuery时，最好允许jQuery指定回调函数的名称，而不是自己指定。

该URL不返回JSONP响应，只返回如下启动的JSON响应：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

您必须查阅文档，了解如何告诉它您需要JSONP，它的开头是这样的：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

另外：在使用jQuery时，最好允许jQuery指定回调函数的名称，而不是自己指定。

该URL不返回JSONP响应，只返回如下启动的JSON响应：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

您必须查阅文档，了解如何告诉它您需要JSONP，它的开头是这样的：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

另外：在使用jQuery时，最好允许jQuery指定回调函数的名称，而不是自己指定。

该URL不返回JSONP响应，只返回如下启动的JSON响应：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

您必须查阅文档，了解如何告诉它您需要JSONP，它的开头是这样的：

{
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

myCallbackFunction({
    "36": {
        "name": "App Store",
        "id": "36",
        "url": "https://itunes.apple.com/us/genre/ios/id36?mt=8",
        "rssUrls": {
            "topAppsByRevenue": "https://itunes.apple.com/us/rss/topappsbyrevenue/genre=36/json",
            "topPaidIpadApplications": "https://itunes.apple.com/us/rss/toppaidipadapplications/genre=36/json",
            "topIpadAppsByRevenue": "https://itunes.apple.com/us/rss/topipadappsbyrevenue/genre=36/json",
            "topFreeIpadApplications": "https://itunes.apple.com/us/rss/topfreeipadapplications/genre=36/json",

单独：使用jQuery时，最好允许jQuery指定回调函数的名称，而不是自己指定。

在寻求帮助时，请保持礼貌，并使用合理的，一致缩进。尝试使用检查语法感谢共享检查语法的链接。请求帮助时，请保持礼貌，并使用合理、一致的缩进设置代码格式。尝试使用检查语法感谢共享检查语法的链接。请求帮助时，请保持礼貌，使用合理、一致的缩进设置代码格式。尝试使用检查语法感谢分享检查语法的链接。寻求帮助时，请保持礼貌，使用合理的缩进设置代码格式，一致的缩进。请尝试使用检查语法感谢您共享用于检查语法的链接。当我使用onlu json时，如：url:“”，数据：{}，数据类型：'json'，其给定错误如：XMLHttpRequest无法加载。请求的资源上不存在“Access Control Allow Origin”标头。因此不允许访问源“null”。我是JavaScript新手：请帮助我分析此URL：Thanks@NaeemParacha：是的，使用

dataType:'json'

时出现错误的原因是，然后您使用的是普通的XMLHttpRequest，而这些请求由。您使用JSONP可能是对的，您只需要查阅正在使用的Apple API的文档，了解如何告诉它您需要JSONP响应。（假设它支持JSONP。）与此URL相同的代码工作正常。。url:''@naemparacha:我告诉过你：告诉API你需要JSONP，而不是JSON。当我使用onlu JSON时，比如：url:''，数据：{}，数据类型：'JSON'，它的给定错误是：XMLHttpRequest无法加载。请求的资源上不存在“Access Control Allow Origin”标头。因此不允许访问源“null”。我是JavaScript新手：请帮助我分析此URL：Thanks@NaeemParacha：是的，使用

dataType:'json'

dataType:'json'

dataType:'json'

时出现错误的原因是，然后您使用的是普通的XMLHttpRequest，而这些请求由。您使用JSONP可能是对的，您只需要查阅正在使用的Apple API的文档，了解如何告诉它您需要JSONP响应。（假设它支持JSONP。）与此URL相同的代码工作正常。。url:''@NaeemParacha：我告诉过你：告诉API你需要JSONP，而不是JSON。