YouTube API nextPageToken

Question

我是 javascript 的新手，而且我有点坚持使用 YouTube API。我能够使用我需要的数据获得结果，遍历每个结果并显示它们，但问题出在 nextPageToken。我似乎无法弄清楚为什么在使用 nextPage 标记的第二个搜索函数之后，我无法丢弃旧的，因此我得到了多个重复的结果。

我正在记录令牌以查看和跟踪它们，而且我总是重复以前的令牌

<body>

 <div class="youtube-feed container">
  <script id="template" type=test/template>
    <div class="youtube-item">
        <a href="{{link}}" class="link">
            <img src="{{thumb}}" alt="">
        </a>
        <div class="info">
            <h6 class="title">{{title}}</h6>
            <p>{{channel}}</p>
            <p>{{views}}</p>
        </div>
    </div>
  </script>
</div>

<div class="button container">
 <a href="#" id="next">Next Page</a>
</div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>

<script>
 (function() {
    var query = 'Random search string',
        apiKey = 'api key here';

    getData();

    function getData() {
        $.get('https://www.googleapis.com/youtube/v3/search', {
            part: 'snippet, id',
            q: query,
            type: 'video',
            maxResults: 10,
            key: apiKey},
        function(data) {
            var nextToken = data.nextPageToken;
            $.each(data.items, function(i, item) {
                var resultsData = {
                    id: item.id.videoId,
                    title: item.snippet.title,
                    desc: item.snippet.description,
                    thumb: item.snippet.thumbnails.medium.url,
                    channel: item.snippet.channelTitle
                };

                $.get('https://www.googleapis.com/youtube/v3/videos', {
                    part: 'statistics',
                    id: resultsData.id,
                    key: apiKey},
                function(data) {
                    $.each(data.items, function(i, item) {
                        var views = item.statistics.viewCount;
                            resultsData.viewCount = views;
                    });
                    renderData(resultsData);
                });
            });
            nextButton(nextToken);
        });
    };

    function renderData(obj) {
        var template = $.trim($('#template').html()),
            dataVals = template.replace(/{{id}}/ig, obj.id)
                                .replace(/{{title}}/ig, obj.title)
                                .replace(/{{thumb}}/ig, obj.thumb)
                                .replace(/{{channel}}/ig, obj.channel)
                                .replace(/{{views}}/ig, obj.viewCount)
                                .replace(/{{link}}/ig, 'https://www.youtube/com/embed/' + obj.id);
        $(dataVals).appendTo('.youtube-feed');
    };

    function nextButton(token) {
        $('#next').on('click', function(e) {
            e.preventDefault();
            nextPage(token);
        });
    };

    function nextPage(token) {
        $.get('https://www.googleapis.com/youtube/v3/search', {
            part: 'snippet, id',
            q: query,
            type: 'video',
            maxResults: 2,
            pageToken: token,
            key: apiKey},
        function(data) {
            var nextToken = data.nextPageToken;
            $.each(data.items, function(i, item) {
                var resultsData = {
                    id: item.id.videoId,
                    title: item.snippet.title,
                    desc: item.snippet.description,
                    thumb: item.snippet.thumbnails.medium.url,
                    channel: item.snippet.channelTitle
                };

                $.get('https://www.googleapis.com/youtube/v3/videos', {
                    part: 'statistics',
                    id: resultsData.id,
                    key: apiKey},
                function(data) {
                    $.each(data.items, function(i, item) {
                        var views = item.statistics.viewCount;
                        resultsData.viewCount = views;
                    });
                    renderData(resultsData);
                });
            });
            nextButton(nextToken);
            console.log(nextToken);
        });
    };
 })();
</script>

</body>

Answer 1

您需要在添加新的点击事件处理程序之前删除您的点击事件处理程序，否则它们会累加，请参阅 this post：

$('#next').off('click').on('click', function(e) {
    e.preventDefault();
    nextPage(token);
});

这是一个完整的示例，它也处理最后一页（当没有 pageToken 字段时）：

<body>

  <div class="youtube-feed container">
    <script id="template" type=test/template>
      <div class="youtube-item">
        <a href="{{link}}" class="link">
          <img src="{{thumb}}" alt="">
        </a>
        <div class="info">
          <h6 class="title">{{title}}</h6>
          <p>{{channel}}</p>
          <p>{{views}}</p>
        </div>
      </div>
    </script>
  </div>

  <div class="button container">
    <a href="#" id="next">Next Page</a>
  </div>

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>

  <script>
    (function() {
      var query = 'TANNOY dvs 6',
        apiKey = 'YOUR_API_KEY';

      var reachLastPage = false;

      getData();

      function getData() {
        $.get('https://www.googleapis.com/youtube/v3/search', {
            part: 'snippet, id',
            q: query,
            type: 'video',
            maxResults: 10,
            key: apiKey
          },
          function(data) {

            $.each(data.items, function(i, item) {
              var resultsData = {
                id: item.id.videoId,
                title: item.snippet.title,
                desc: item.snippet.description,
                thumb: item.snippet.thumbnails.medium.url,
                channel: item.snippet.channelTitle
              };

              $.get('https://www.googleapis.com/youtube/v3/videos', {
                  part: 'statistics',
                  id: resultsData.id,
                  key: apiKey
                },
                function(data) {
                  $.each(data.items, function(i, item) {
                    var views = item.statistics.viewCount;
                    resultsData.viewCount = views;
                  });
                  renderData(resultsData);
                });
            });

            if (data.nextPageToken) {
              console.log("go to token : " + data.nextPageToken);
              nextButton(data.nextPageToken);
            } else {
              console.log("no page left");
              reachLastPage = true;
            }
          });
      };

      function renderData(obj) {
        var template = $.trim($('#template').html()),
          dataVals = template.replace(/{{id}}/ig, obj.id)
          .replace(/{{title}}/ig, obj.title)
          .replace(/{{thumb}}/ig, obj.thumb)
          .replace(/{{channel}}/ig, obj.channel)
          .replace(/{{views}}/ig, obj.viewCount)
          .replace(/{{link}}/ig, 'https://www.youtube/com/embed/' + obj.id);
        $(dataVals).appendTo('.youtube-feed');
      };

      function nextButton(token) {
        $('#next').off('click').on('click', function(e) {
          e.preventDefault();
          if (!reachLastPage) {
            nextPage(token);
          } else {
            console.log("we already have reached last page!");
          }
        });
      };

      function nextPage(token) {
        $.get('https://www.googleapis.com/youtube/v3/search', {
            part: 'snippet, id',
            q: query,
            type: 'video',
            maxResults: 2,
            pageToken: token,
            key: apiKey
          },
          function(data) {

            $.each(data.items, function(i, item) {
              var resultsData = {
                id: item.id.videoId,
                title: item.snippet.title,
                desc: item.snippet.description,
                thumb: item.snippet.thumbnails.medium.url,
                channel: item.snippet.channelTitle
              };

              $.get('https://www.googleapis.com/youtube/v3/videos', {
                  part: 'statistics',
                  id: resultsData.id,
                  key: apiKey
                },
                function(data) {
                  $.each(data.items, function(i, item) {
                    var views = item.statistics.viewCount;
                    resultsData.viewCount = views;
                  });
                  renderData(resultsData);
                });
            });
            if (data.nextPageToken) {
              console.log("go to token : " + data.nextPageToken);
              nextButton(data.nextPageToken);
            } else {
              console.log("no page left");
              reachLastPage = true;
            }
          });
      };
    })();
  </script>

</body>

YouTube API nextPageToken

YouTube API nextPageToken

javascript

jquery

html

youtube-api

youtube-javascript-api