JSFiddle - React, Tailwind, and code Playground

HTML

<button id="btn1">Button 1</button>
<button id="btn2">Button 2</button>
<button id="btn3">Button 3</button>

JavaScript

// 要求按“Button 1” 显示 “This is button: 1”，以此类推
for (var i = 1; i <= 3; i++) {
    document.getElementById("btn" + i).onclick = function() {
        alert("This is button: " + i);
    };
}