AI-generated forms: Do field names disappear when you type? How to use label and placeholder correctly

When I had an AI create a form, "Email Address" was displayed inside the input field. It looked clean, but as soon as I typed, the guide text disappeared.With forms like this, you might find yourself ...
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小程序 input 输入框属性详解：placeholder 样式与上下左右居中实战（图文+代码）

做微信小程序表单时，input 组件几乎是绕不开的一环。它看起来简单，但真正落到项目里，问题往往集中在两件事上：一是属性太多记不住，二是 placeholder 提示文字和输入内容在框里总是对不齐。