<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>计算小案例</title>
</head>
<body>
<div class="calculator J_calculater">
<p>结果:<span class="result">0</span></p>
<div class="input_wrap">
<input type="text" value="0" placeholder="第一个数字"/>
<input type="text" value="0" placeholder="第二个数字"/>
</div>
<div class="button-group">
<button data-method="plus">+</button>
<button data-method="minus">-</button>
<button data-method="mul">*</button>
<button data-method="div">/</button>
</div>
</div>
</body>
</html>运行结果
