js_给元素增加或移除style属性

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <input type="text" name="test" id="test">
</body>
<script>
    var el = document.getElementById('test')
    // 设置属性
    el.style.setProperty("border", "2px solid tomato")

    // 取消属性
    el.style.removeProperty("border")
</script>
</html>