如何根据 div 大小缩放字体大小？ [复制]

Question

如何根据字符数和panel-default 大小来扩大/缩小font-size？例如，很多字符意味着font-size 会更小，或者更小的屏幕也意味着更小的font-size。 font-size 应该适合 div。

css

*,
*:before,
*:after {
  box-sizing: border-box;
}

body {
  margin: 0
}

.testing-here {
  font-size: 0;
}

.panel-default {
  box-sizing: border-box;
  border-style: none;
  position: relative;
  width: 50%;
  padding-bottom: 40%;
  overflow: hidden;
  background-color: #446CB3;
  border-radius: 0;
  display: inline-block;
  margin-bottom: 0px;
  border: 2.5px white solid;
}

.panel-body {
  color: white;
  text-align: center;
  position:absolute;
  font-size: 16px;
}

html

<div class="testing-here">
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example
    </div>
  </div>
</div>

有没有办法在没有 javascript 的情况下做到这一点？

Answer 1

如果您的面板是从窗口的width 调整大小的，您可以使用vw 单位（所有问题都伴随着：太大或太小而无法阅读）

您可以添加媒体查询以将font-size 保持在最小和最大大小内。

*,
*:before,
*:after {
  box-sizing: border-box;
}
body {
  margin: 0
}
.testing-here {
  font-size: 0;
}
.panel-default {
  box-sizing: border-box;
  border-style: none;
  position: relative;
  width: 50%;
  padding-bottom: 40%;
  overflow: hidden;
  background-color: #446CB3;
  border-radius: 0;
  display: inline-block;
  margin-bottom: 0px;
  border: 2.5px white solid;
}
.panel-body {
  color: white;
  width: 100%;
  height: 100%;
  text-align: center;
  position: absolute;
  font-size: 5vw;
  /* will be 5% of window's width so 10% of panel's width */
}
@media (min-width: 1000px) {
  .panel-body {
    font-size: 50px;
  }
}
@media (max-width: 320px) {
  .panel-body {
    font-size: 16px;
  }
}

<div class="testing-here">
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example show me full page & resize window
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example font-size kept in between 16 and 50px max
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example
    </div>
  </div>
  <div class="panel panel-default">
    <div class="panel-body">
      Basic panel example
    </div>
  </div>
</div>

您还可以使用媒体查询来保持字体可读或仅在不同断点处使用媒体查询