JSFiddle - React, Tailwind, and code Playground

by xu shujun

HTML

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

CSS

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

JavaScript

var btn = document.getElementById("btn");
var result = document.getElementById("result");
btn.onclick = function(){
      var ary = Array(3);
    ary[0]=2
    result.innerHTML = ary.map(function(elem) { return '1'; });
}