为什么 material 组件中的第二个输入文本字段不起作用？

Question

我在我的网站中使用了 material 组件输入。我创建了两个相同的输入。这是我的所有代码：

<link rel="stylesheet" href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css">
<body>
    <div class="information">
        <label class="mdc-text-field mdc-text-field--outlined">
            <span class="mdc-notched-outline">
                <span class="mdc-notched-outline__leading"></span>
                <span class="mdc-notched-outline__notch">
                    <span class="mdc-floating-label" id="first">First</span>
                </span>
                <span class="mdc-notched-outline__trailing"></span>
            </span>
            <input type="text" class="mdc-text-field__input" aria-labelledby="first">
        </label>
    </div>
    <div>
        <label class="mdc-text-field mdc-text-field--outlined">
            <span class="mdc-notched-outline">
                <span class="mdc-notched-outline__leading"></span>
                <span class="mdc-notched-outline__notch">
                    <span class="mdc-floating-label" id="second">Second</span>
                </span>
                <span class="mdc-notched-outline__trailing"></span>
            </span>
            <input type="text" class="mdc-text-field__input" aria-labelledby="second">
        </label>
    </div>

    <script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>
    <script>
        mdc.textField.MDCTextField.attachTo(document.querySelector('.mdc-text-field'));
    </script>
</body>

但只有我的第一个输入工作正常（当我点击时标签移动到顶部）。而第二个似乎没有那样的效果：

有什么问题？谢谢

Answer 1

好像mdc.textField.MDCTextField.attachTo(document.querySelector('.mdc-text-field'));只适用于一个元素

所以我修改了代码，使两个输入应用脚本，如下所示

<link rel="stylesheet" href="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.css">
<body>
    <div class="information">
        <label class="mdc-text-field mdc-test1 mdc-text-field--outlined">
            <span class="mdc-notched-outline">
                <span class="mdc-notched-outline__leading"></span>
                <span class="mdc-notched-outline__notch">
                    <span class="mdc-floating-label" id="first">First</span>
                </span>
                <span class="mdc-notched-outline__trailing"></span>
            </span>
            <input type="text" class="mdc-text-field__input" aria-labelledby="first">
        </label>
    </div>
    <div>
        <label class="mdc-text-field mdc-test2 mdc-text-field--outlined">
            <span class="mdc-notched-outline">
                <span class="mdc-notched-outline__leading"></span>
                <span class="mdc-notched-outline__notch">
                    <span class="mdc-floating-label" id="second">Second</span>
                </span>
                <span class="mdc-notched-outline__trailing"></span>
            </span>
            <input type="text" class="mdc-text-field__input" aria-labelledby="second">
        </label>
    </div>

    <script src="https://unpkg.com/material-components-web@latest/dist/material-components-web.min.js"></script>
    <script>
        mdc.textField.MDCTextField.attachTo(document.querySelector('.mdc-test1'));
        mdc.textField.MDCTextField.attachTo(document.querySelector('.mdc-test2'));
    </script>
</body>

为什么 material 组件中的第二个输入文本字段不起作用？

Why does the second input textfield in material component not working?

angular

material-design

material-components-web