Edit in JSFiddle

var btn = document.getElementById("btn");
var result = document.getElementById("result");

btn.onclick = function(){
    try{[ [3,2,1].reduce(Math.pow), [].reduce(Math.pow)]} catch(e) {
     result.innerHTML = "结果是:" + e.message
    }   
}

<p>点击查看结果：</p>
<button id="btn">查看结果</button>
<p>结果：</p>
<div id="result"></div>

p {
    font-size: 14px;
    height 24px;
    line-height: 24px;
}