从API抓取页面标题是否警报未定义？

Question

This bit of code below scans an API on Wikipedia, and then is supposed to alert the title of it by getting the JSON property "title". However, it just alerts undefined , and for some reason, it alerts it twice. What am I doing wrong?

$.get('https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=&titles=Twitter', function(data){
  for (var Object in data){
    var Info = data[Object]
    var Title = Info["title"]
    alert(Title)
  }
})

Answer 1

This will work:

$.get('https://en.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=&titles=Twitter', function(data) {
  $.each(data.query.pages, function( index, value ) {
    var title = value.title;
    alert(title);
  });
})

The query returns a data object, which has a query object within it, and one/multiple pages within that. Iterate over each page, and grab the title string.

JSFiddle

Note: You may want to learn to use your browser's debugging tools, and read up on the JSON format.