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CSS for after content(用于后续内容的CSS)

转载 作者：bug小助手 更新时间：2023-10-28 09:23:56 26 4
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I created a user input field which is mandatory to fill. As a part of this, I wanted to add a star (as it is a common practice) to let the user know that the field is required to be filled. I used the shadow command to add the star. However, the stars do not align with the text as I believe there is no reference point for them. I am attaching part of the HTML and CSS below. I do not understand how to provide them with a reference point without disturbing my existing structure. Also, is the use of shadow element is how it is usually done?

我创建了一个必须填写的用户输入字段。作为其中的一部分，我想添加一个星号(因为这是一种常见的做法)，以让用户知道该字段需要填写。我使用阴影命令添加了星星。然而，星星并不与文本对齐，因为我认为它们没有参考点。我附上了下面的HTML和CSS的一部分。我不明白如何在不扰乱我现有结构的情况下为他们提供一个参考点。另外，影子元素的使用是不是通常是这样做的呢？




.feedback-data form {
  position: relative;
  top: 12rem;
  justify-content: center;
  align-items: center;
  display: flex;
  flex-flow: column nowrap;
  gap: 0.5rem;
}

.name-form {
  display: flex;
  gap: 1rem;
}

.name-form .data-form {
  flex: 1;
}

.data-form {
  display: flex;
  flex-flow: column-reverse nowrap;
  gap: 1.5rem;
}


.required::before {
  position: absolute;
  content: '*'; 
  color: red;
  margin-right: 4px; 
}

<div class="feedback-data">
  <form action="" method="post">
    <div class="name-form">
      <div class="data-form  required">
        <input type="text" id="firstName" required>
        <label for="firstName">First Name</label>
      </div>
      <div class="data-form required">
        <input type="text" id="lastName" required>
        <label for="lastName">Last Name</label>
      </div>
    </div>
  </form>
</div>




更多回答

Welcome! The term you're looking for is pseudo element (not shadow). You can put that on the label instead of the wrapper element: .required label::after {...}. You can also remove position: absolute if you do it that way. If you want it on the wrapper, just add position: relative to .data-form. Some good reading about positioning and parent elements - and you don't need to use a pseudo element if you control the markup of the form, just put a <span>*</span> in the label element

欢迎光临！您要查找的术语是伪元素（不是阴影）。你可以把它放在标签上，而不是包装器元素：.required label：：after {...}。你也可以删除position：absolute，如果你这样做的话。如果你想把它放在包装器上，只需要添加position：relative to .data-form。一些关于定位和父元素的好读物--如果你控制表单的标记，你不需要使用伪元素，只需要在标签元素中放一个 *

优秀答案推荐

Heres two samples you can play with. I am not sure if this is what you mean. Basically just put a negative margin on the star on the first examble and usually i put it after the label when I am indicating required. Let me know if this helps

这里有两个样品，你可以玩。我不确定这是否是你的意思。基本上只是把一个负利润率的明星对第一个例子，通常我把它后的标签时，我指出需要。如果有帮助就告诉我




.feedback-data form {
  position: relative;
  top: 12rem;
  justify-content: center;
  align-items: center;
  display: flex;
  flex-flow: column nowrap;
  gap: 0.5rem;
}

.name-form {
  display: flex;
  gap: 1rem;
}

.name-form .data-form {
  flex: 1;
}

.data-form {
  display: flex;
  flex-flow: column-reverse nowrap;
  gap: 1.5rem;
}


.required::before {
  position: absolute;
  content: '*'; 
  color: red;
  margin-left: -10px;
}


/** star by the label **/

label.star::after {
  position: absolute;
  content: '*'; 
  color: red;
  
}

<div class="feedback-data">
  <form action="" method="post">
  <h2>SAMPLE 1 is with -margin</h2>
    <div class="name-form">
      <div class="data-form  required">
        <input type="text" id="firstName" required>
        <label for="firstName">First Name</label>
      </div>
      <div class="data-form required">
        <input type="text" id="lastName" required>
        <label for="lastName">Last Name</label>
      </div>
    </div>
  </form>
</div>

<br>
<br>
<br>



<div class="feedback-data">
  <form action="" method="post">
  <h2>SAMPLE 2 by the label</h2>
    <div class="name-form">
      <div class="data-form  required">
        <input type="text" id="firstName" required>
        <label class="star" for="firstName">First Name</label>
      </div>
      <div class="data-form required">
        <input type="text" id="lastName" required>
        <label class="star" for="lastName">Last Name</label>
      </div>
    </div>
  </form>
</div>




更多回答

Hey, thanks for the answer. The reason why I can't use your answer is because you have used a label as the selection. This will cause all the labels to have a star. However, I also have fields that are not necessary to fill. That was the reason why I have created the 'required' class

嘿，谢谢你的回答。我不能使用您的答案的原因是因为您使用了标签作为选项。这将导致所有标签都有一个星号。但是，我也有一些不需要填写的字段。这就是我创建‘Required’类的原因

@ThorThedog as you can see it was specified on the label to have a class star on it so it doesnt affect everything else.

@ThorThedog，正如你所看到的，它在标签上被指定为有一个类星，所以它不会影响其他一切。

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