JSON APIs and Ajax

在 vscode 上測試的前置作業

預覽 html
安裝 jQuery 與 bootstrap

<head>
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js">
  </script>
  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>

1-Trigger Click Events with jQuery

在 $(document).ready(function(){} 裡新增一個 click 事件(暫時裝飾用)

<script>
  $(document).ready(function() {
    // Only change code below this line.
    $("#getMessage").on("click", function(){

    });

    // Only change code above this line.
  });
</script>


<div class="container-fluid">
  <div class = "row text-center">
    <h2>Cat Photo Finder</h2>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12 well message">
      The message will go here
    </div>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12">
      <button id = "getMessage" class = "btn btn-primary">
        Get Message
      </button>
    </div>
  </div>
</div>

2-Change Text with Click Events

按下按鈕後，文字會改變

<script>
  $(document).ready(function() {
    $("#getMessage").on("click", function(){
      // Only change code below this line.
      $(".message").html("Here is the message");
      // Only change code above this line.
    });
  });
</script>


<div class="container-fluid">
  <div class = "row text-center">
    <h2>Cat Photo Finder</h2>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12 well message">
      The message will go here
    </div>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12">
      <button id = "getMessage" class = "btn btn-primary">
        Get Message
      </button>
    </div>
  </div>
</div>

3-Get JSON with the jQuery getJSON Method

<script>
  $(document).ready(function() {

    $("#getMessage").on("click", function(){
      // Only change code below this line.
      $.getJSON("/json/cats.json", function(json) {
        $(".message").html(JSON.stringify(json));
      });

      // Only change code above this line.
    });

  });
</script>

<div class="container-fluid">
  <div class = "row text-center">
    <h2>Cat Photo Finder</h2>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12 well message">
      The message will go here
    </div>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12">
      <button id = "getMessage" class = "btn btn-primary">
        Get Message
      </button>
    </div>
  </div>
</div>

4-Convert JSON Data to HTML

javascript - How to parse JSON using Node.js? - Stack Overflow

<script>
  $(document).ready(function() {

    $("#getMessage").on("click", function() {
      $.getJSON("/json/cats.json", function(json) {

        var html = "";
        // Only change code below this line.
        json.forEach(function(val) {

          var keys = Object.keys(val);
          html += "<div class = 'cat'>";

          keys.forEach(function(key) {
            html += "<strong>" + key + "</strong>: " 
              + val[key] + "<br>";
          });

          html += "</div><br>";

        });

        // Only change code above this line.

        $(".message").html(html);

      });
    });
  });
</script>

<div class="container-fluid">
  <div class = "row text-center">
    <h2>Cat Photo Finder</h2>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12 well message">
      The message will go here
   </div>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12">
      <button id = "getMessage" class = "btn btn-primary">
        Get Message
      </button>
    </div>
  </div>
</div>

5-Render Images from Data Sources

<script>
  $(document).ready(function() {

    $("#getMessage").on("click", function() {
      $.getJSON("/json/cats.json", function(json) {

        var html = "";

        json.forEach(function(val) {

          html += "<div class = 'cat'>";

          // Only change code below this line.

          html += "<img src = '" + val.imageLink + "' " 
            + "alt='" + val.altText + "'>";


          // Only change code above this line.

          html += "</div>";

        });

        $(".message").html(html);

      });
    });
  });
</script>

<div class="container-fluid">
  <div class = "row text-center">
    <h2>Cat Photo Finder</h2>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12 well message">
      The message will go here
    </div>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12">
      <button id = "getMessage" class = "btn btn-primary">
        Get Message
      </button>
    </div>
  </div>
</div>

6-Prefilter JSON

<script>
  $(document).ready(function() {

    $("#getMessage").on("click", function() {
      $.getJSON("/json/cats.json", function(json) {

        var html = "";

        // Only change code below this line.        
        json = json.filter(function(val){
          return (val.id !== 1);
        })

        // Only change code above this line.

        json.forEach(function(val) {
          html += "<div class = 'cat'>"
          html += "<img src = '" + val.imageLink + "' " 
          + "alt='" + val.altText + "'>"
          html += "</div>"
        });

        $(".message").html(html);

      });
    });
  });
</script>

<div class="container-fluid">
  <div class = "row text-center">
    <h2>Cat Photo Finder</h2>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12 well message">
      The message will go here
    </div>
  </div>
  <div class = "row text-center">
    <div class = "col-xs-12">
      <button id = "getMessage" class = "btn btn-primary">
        Get Message
      </button>
    </div>
  </div>
</div>

7-Get Geolocation Data

<script>
  // Only change code below this line.
if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(function(position) {
    $("#data").html("latitude: " + position.coords.latitude + "<br>longitude: " + position.coords.longitude);
  });
}


  // Only change code above this line.
</script>
<div id = "data">
  <h4>You are here:</h4>

</div>

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Last updated 5 years ago

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