实例 » - 在线编辑器

          <p> + 号运算符用于连接字符串。</p>
<button onclick="myFunction()">点我</button>
<p id="demo"></p>
<script>
  function myFunction() {
    var text1 = "Good ";
    var text2 = "Morning";
    var text3 = text1 + text2;
    document.getElementById("demo").innerHTML = text3;
  }
</script>
        