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  <label for="submitword">Enter Word Here</label>
  <input id="submitword" type="text" name="name">
  <input type="submit" value="submit">

<h1 class="title">Meaning of <span style="color:blue" class="qword"></span> </h1>

<p class="definition"></p>




var def = document.querySelector('.definition');
var qword = document.querySelector('.qword');
var url;
var form = document.querySelector('form');
var apiKey = "5a1d59fba2c80d6e9a20b0c83da02b0a4c862a9668479c8f2";

function makeUrl(word){
  return ""+ word + "/definitions" +
  "?useCanonical=false" +
  "&limit=200" +
  "&api_key=" + apiKey;     
function makeRequest() {
  xhr = new XMLHttpRequest();
  xhr.onload = function() {
    if(xhr.status === 200){
      var response = JSON.parse(this.responseText);
        if (response[0]===undefined){
          def.innerHTML = "你單字拼錯了!!!";
          // 把查詢結果放進標題
          qword.innerHTML = response[0].word;

          // 放兩個單字釋義
          def.innerHTML = "1. "+ response[0].text+"<br>2. "+ response[1].text;

    }else if (xhr.status === 404){
      def.innerHTML = "請輸入一個英文單字";
  };"GET", url, true);

  // 防止頁面重新整理
  // 抓取使用者輸入的字
  var input =[0].value;
  // 產生 URL
  url = makeUrl(input);
  // 發出 API Request
  // 記得把 input 框清空[0].value = '';