<p id="demo">点击按钮合并数组。</p> <button onclick="myFunction()">点我</button> <script> function myFunction(){ var hege = ["Cecilie", "Lone"]; var stale = ["Emil", "Tobias", "Linus"]; var children = hege.concat(stale); var x=document.getElementById("demo"); x.innerHTML=children; } </script>