Bootstrap环境下jQuery.getJSON函数失效，Udacity AJAX项目求助

Hey there, sorry to hear your project stopped working entirely after adding the New York Times article call—let’s break down the most likely issues and how to fix them.

First, Check for Console Errors #

The #1 culprit for sudden script failures is an uncaught error that halts all execution. Open your browser’s DevTools (press F12 or Ctrl+Shift+I), go to the Console tab, and look for red error messages. Common ones here include:

• ReferenceError: $ is not defined: jQuery isn’t loaded properly—double-check your jQuery script tag is placed above your custom JavaScript code.
• No 'Access-Control-Allow-Origin' header is present: CORS issue with the NYT API. You may need to use their JSONP endpoint or ensure your request includes a valid API key with proper permissions.
• SyntaxError: Unexpected token < in JSON at position 0: The API is returning HTML (like an error page) instead of valid JSON. This usually means your request URL is incorrect, or your API key is invalid/missing.

Debug the jQuery.getJSON() Call #

getJSON fails silently by default if the request goes wrong, which can take down your whole script. Add explicit error handling to catch issues:

// Replace your existing getJSON call with this to debug
$.getJSON('your-nyt-api-url-here')
  .done(function(articleData) {
    // Your existing article processing code here
    console.log('NYT data loaded successfully:', articleData);
  })
  .fail(function(jqXHR, textStatus, errorThrown) {
    console.error('NYT Request Failed:', textStatus, errorThrown);
    console.log('Server response content:', jqXHR.responseText);
  });

This will log exactly why the request failed—whether it’s a bad URL, invalid API key, or something else.

Verify Your Code Isn’t Blocking Execution #

If the getJSON callback has a bug (like trying to access a property on an undefined object), it’ll stop the entire script. Try commenting out the callback logic temporarily:

$.getJSON('your-nyt-api-url-here')
  .done(function(articleData) {
    // Comment out all your processing code here first
    console.log('Data came through—callback logic was the issue');
  })
  .fail(function(...) { /* Keep the error handler */ });

If your Google Street View comes back after this, the problem is in how you’re handling the NYT data (e.g., looping over an empty array, modifying the wrong DOM element).

Check for Conflicts with Street View Code #

Make sure your new code isn’t accidentally breaking the Street View setup:

• Did you overwrite or delete the DOM element that holds the Street View? Double-check your HTML for the container div (usually something like <div id="streetview"></div>).
• Is your Street View initialization function being called after the NYT request? If you moved it inside the getJSON callback by mistake, it might not run if the request fails.

Quick Isolation Test #

Comment out the entire getJSON block and refresh the page. If the Street View works again, the problem is definitely tied to that NYT API call. If it still doesn’t work, you might have accidentally modified another part of your code while adding the new feature—undo recent changes step by step.

内容的提问来源于stack exchange，提问作者Khai