使最后一个网格单元不活动

时间:2019-06-10 07:24:06

标签: css reactjs

我有一个用ReactJS制作的4列网格。网格包含一定数量的元素,其中带有图片和文字。如果填充了五个元素,则最后三个元素必须处于非活动状态,因此每行总有四列,周围没有空白。 最后一个单元格(最多3个)应始终处于非活动状态。没有悬停,没有焦点,只是一个空元素。 网格元素是从硬编码的JSON中获取的。目前,我的最后一个单元格是{[name:'',img:``}]

我对ReactJS还是很陌生,无法提出解决方案,也无法在stackoverflow中找到解决方案。指出正确的方向。

const GridItem = ({ name, path, altText }) => {
return (
    <li className={'grid-item'} key={name}>
        <a className={'link'}>
            <div className={'image'}>
                <img src={path} alt={altText} />
            </div>
            <div className={'image-text'}>{name}</div>
        </a>
    </li>
);

};

预期输出:
[img] [img] [img] [img]
[img] [null] [null] [null]

1 个答案:

答案 0 :(得分:2)

这更像是一个CSS问题,有很多方法可以实现。

我建议使用display: gridgrid-template-columns进行基于网格的布局:

.grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 2px;
}

.grid img {
  width: 100%;
}
<div class="grid">
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
</div>

您不必创建伪单元格,但是如果您确实需要,可以添加一些简单的CSS来隐藏它们:

.grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 2px;
}

.grid img {
  width: 100%;
}

.grid img[src=""] {
  display: none;
}
<div class="grid">
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="https://picsum.photos/200/200" />
  <img src="" />
  <img src="" />
  <img src="" />
</div>


更新

您可以像这样更改代码,如果name为空,请给此单元格一些提示,以便您轻松设置其样式:

const GridItem = ({ name, path, altText }) => {
return (
    <li className={'grid-item'} key={name}>
        <a className={`${name ? 'link' : 'link link__empty'}`}>
            <div className={'image'}>
                <img src={path} alt={altText} />
            </div>
            <div className={'image-text'}>{name}</div>
        </a>
    </li>
);

或者根本不填充其内容:

const GridItem = ({ name, path, altText }) => {
return (
    <li className={'grid-item'} key={name}>
        <a className={'link'}>
            (name && 
            <React.Fragment>
                <div className={'image'}>
                    <img src={path} alt={altText} />
                </div>
                <div className={'image-text'}>{name}</div>
            </React.Fragment>)
        </a>
    </li>
);

结果应该是这样的:

* {
  box-sizing: border-box;
}

.grid {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
}

.grid-item {
  /* exclude the border, make it 4 columned grid */
  flex: 0 1 calc(25% - 2px);
  
  /* the border is 1px, so the equation above is minus 2px*/
  border: solid #000 1px;
}

.link {
  text-decoration: none;
}

.image {
  width: 100%;
}

.image-text {
  text-align: center;
}

.link__empty *{
  /* if it's empty, do not display any of it's children */
  display: none;
}
<ul class="grid">
  <li class="grid-item">
    <a class="link" href="javascript: void(0)">
      <img class="image" src="https://picsum.photos/200/200" alt="image" />
      <div class="image-text">image</div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link" href="javascript: void(0)">
      <img class="image" src="https://picsum.photos/200/200" alt="image" />
      <div class="image-text">image</div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link" href="javascript: void(0)">
      <img class="image" src="https://picsum.photos/200/200" alt="image" />
      <div class="image-text">image</div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link" href="javascript: void(0)">
      <img class="image" src="https://picsum.photos/200/200" alt="image" />
      <div class="image-text">image</div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link" href="javascript: void(0)">
      <img class="image" src="https://picsum.photos/200/200" alt="image" />
      <div class="image-text">image</div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link link__empty" href="javascript: void(0)">
      <img class="image" src="" alt="" />
      <div class="image-text"></div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link link__empty" href="javascript: void(0)">
      <img class="image" src="" alt="" />
      <div class="image-text"></div>
    </a>
  </li>
  <li class="grid-item">
    <a class="link link__empty" href="javascript: void(0)">
      <img class="image" src="" alt="" />
      <div class="image-text"></div>
    </a>
  </li>
</ul>