​x
 
<!DOCTYPE html>
<html>
<body>
​
<p>+ 运算符连接（添加）字符串。</p>
​
<button onclick="myFunction()">试一试</button>
​
<p id="demo"></p>
​
<script>
function myFunction() {
  var text1 = "Good ";
  var text2 = "Morning";
  text1 += text2
  document.getElementById("demo").innerHTML = text1;
}
</script>
​
</body>
</html>
​