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javascriptを使ったjson学習

Posted at

javascriptを使ったJSON学習


以下のサイトのデータを取得してみよう!!

※自動でhtmlに表示する部分はまだ作成中!!

<DOCTYPE html>
<head>
<title>都道府県の市町村取得 API</title> 
<style>
h1 { color: #f37053; }
#wea1 { color: #f37053; }
</style>
</head>
<body>

<h1>市町村情報取得を取得できます</h1>

<select name="region" id="selectregion1">
<option value="東京都">東京都</option>
<option value="神奈川県">神奈川県</option>
<option value="千葉県">千葉県</option>
<option value="埼玉県">埼玉県</option>

</select>
<input type="button" value="市町村情報取得" onclick="forcast()">


<p id="wea1" ></p>
<p id="wea2" ></p>




<script> 

function forcast(){

const str = document.getElementById("selectregion1").value;

let url = "https://geoapi.heartrails.com/api/json?method=getCities&prefecture=";

url2 = url + str

fetch(url2)
   .then(function(response) {
       return response.json();
   })
   .then(function(region) {
       //console.log(region);
       
       
       var count = Object.keys(region.response['location']).length;
       
       
       
       console.log(count);
       
       for ( i=0; i < count; i++) {
       
       document.getElementById("wea1").innerHTML = region.response.location[i].city;
       document.getElementById("wea2").innerHTML = region.response.location[i].city_kana;
           
      }
       
       
       
});


}


</script>

</body>
</html>
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