Question

我用25px的填充物创建了一个父div。在该div中，我创建了另一个带边框顶部的li标记，宽度为100％，但没有填满父div。它在25px的填充处停止。

尝试过边框，但这种方法也可以。

当我将li元素的宽度更改为115％时

* {
  padding: 0;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  overflow: hidden;
  font-family: Helvetica;
}

.dark {
  background-color: #17202A;
}

section {
  background-color: #1C2733;
  width: 500px;
  height: 300px;
  border-radius: 25px;
  padding: 20px;
  color: white;
}

h1 {
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.2px;
}

ul {
  margin-top: 20px;
  width: 100%;
}

li {
  padding-top: 10px;
  padding-bottom: 10px;
  align-items: center;
  list-style: none;
  height: 50px;
  border-top: 1px solid white;
  width: 115%;
  margin: auto;
}

<section>
  <h1>Who to follow</h1>
  <ul>
    <li>dsdfd</li>
    <li>sdfsdf</li>
    <li>sdfsdf</li>
  </ul>
</section>

Required Output

Answer 1

这是填充的正常行为。您可以从父元素中删除填充，然后将其添加到子元素中：

* {
  padding: 0;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  overflow: hidden;
  font-family: Helvetica;
}

.dark {
  background-color: #17202A;
}

section {
  background-color: #1C2733;
  width: 500px;
  height: 300px;
  border-radius: 25px;
  padding: 0;
  color: white;
}

h1 {
  font-size: 23px;
  font-weight: 800;
  padding: 20px 20px 0;
  letter-spacing: -0.2px;
}

ul {
  margin-top: 20px;
  width: 100%;
}

li {
  padding: 10px 20px;
  align-items: center;
  list-style: none;
  height: 50px;
  border-top: 1px solid white;
  width: 100%;
  margin: auto;
}

<section>
  <h1>Who to follow</h1>
  <ul>
    <li>dsdfd</li>
    <li>sdfsdf</li>
    <li>sdfsdf</li>
  </ul>
</section>

Answer 2

li {
    align-items: center;
    list-style: none;
    height: 50px;
    border-top: 1px solid white;
    width: auto;
    margin: 0 -20px;
    padding: 10px;
}

Answer 3

执行以下步骤

从section类中删除填充。
向h2和li组件中添加填充。
删除li的width属性，让它采用100％的宽度默认

*{
  padding:0;
  margin:0;
}


body{
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  overflow: hidden;
  font-family:Helvetica;
}

.dark{
  background-color: #17202A;
}

section{
  background-color:#1C2733;
  width:500px;
  height:300px;
  border-radius:25px;
  color:white;
}

h1{
  font-size:23px;
  font-weight:800;
  letter-spacing:-0.2px;
  padding: 20px;
}

ul{
  margin-top:20px;
  width:100%;
}

li{
  padding-top:10px;
  padding-bottom:10px;
  align-items:center;
  list-style:none;
  height:50px;
  border-top: 1px solid white;
  margin:auto;
  padding: 20px;
}

<body class="dark">
  <section>
    <h1>Who to follow</h1>
    <ul>
      <li>dsdfd</li>
      <li>sdfsdf</li>
      <li>sdfsdf</li>
    </ul>
  </section>
</body>

Answer 4

* {
  padding: 0;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  overflow: hidden;
  font-family: Helvetica;
}

.dark {
  background-color: #17202A;
}

section {
  background-color: #1C2733;
  width: 500px;
  height: 300px;
  border-radius: 25px;
  padding: 0;
  color: white;
}

h1 {
  font-size: 23px;
  font-weight: 800;
  padding: 20px 20px 0;
  letter-spacing: -0.2px;
}

ul {
  margin-top: 20px;
  width: 100%;
}

li {
  padding: 10px 20px;
  align-items: center;
  list-style: none;
  height: 50px;
  border-top: 1px solid white;
  width: 100%;
  margin: auto;
}

<section>
  <h1>Who to follow</h1>
  <ul>
    <li>dsdfd</li>
    <li>sdfsdf</li>
    <li>sdfsdf</li>
  </ul>
</section>

Answer 5

您可以执行多种方法，但是根据您的代码，可以使用负边距并删除width属性来轻松实现此目的：

* {
  padding: 0;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0;
  margin: 0;
  overflow: hidden;
  font-family: Helvetica;
}

.dark {
  background-color: #17202A;
}

section {
  background-color: #1C2733;
  width: 500px;
  height: 300px;
  border-radius: 25px;
  padding: 20px;
  color: white;
}

h1 {
  font-size: 23px;
  font-weight: 800;
  letter-spacing: -0.2px;
}

ul {
  margin-top: 20px;
  width: 100%;
}

li {
  align-items: center;
  list-style: none;
  height: 50px;
  border-top: 1px solid white;
  padding:10px 20px;
  margin: auto;
  margin-left:-20px; /* value equivalent of `padding` left side applied parent container */
  margin-right:-20px; /* value equivalent of `padding` right side applied parent container */
}

<section>
  <h1>Who to follow</h1>
  <ul>
    <li>dsdfd</li>
    <li>sdfsdf</li>
    <li>sdfsdf</li>
  </ul>
</section>

Answer 6

li {
    border-top: 1px solid white;
    display: block;
    height: 50px;
    margin: 0 -20px;
    padding: 10px 10px;
}

如何获取边框属性以填充具有n个填充的div的100％宽度

6 个答案: