在这篇文章中，我们将使用最新的Bootstrap 5框架制作一个简单的在线计算器应用程序。

这是一款只接受十进制数字的计算器应用程序。这将帮助您开始使用Bootstrap 5，并了解如何将其风格融入您自己的应用程序中。

如何使用它:

1.在文档中加载所需的jQuery库和Bootstrap 5样式表。

<link rel="stylesheet" href="/path/to/cdn/bootstrap.min.css" />
<script src="/path/to/cdn/jquery.slim.min.js"></script>

2.为计算器创建HTML，并使用Bootstrap的按钮实用程序类设置按钮样式：

<div class="calculator-area mx-auto justify-content-center border border-primary text-center">
  <div class="history col-12">
    <div class="logo">
      jQueryScript.Net
    </div>
    <div class="below-logo">
      <input type="text" class="border border-primary form-control-sm text-center history-screen" disabled/>
    </div>
  </div>
  <div class="row">
    <input type="text" class="input-screen border border-primary form-control-lg col-9 text-end" disabled/>
    <button type="button" class="btn btn-outline-danger reset col" value="reset">RESET</button>
  </div>
  <div class="row">
    <button type="button" class="btn btn-outline-secondary col" value="7">7</button>
    <button type="button" class="btn btn-outline-secondary col" value="8">8</button>
    <button type="button" class="btn btn-outline-secondary col" value="9">9</button>
    <button type="button" class="btn btn-outline-primary col" value="+">+</button>
  </div>
  <div class="row">
    <button type="button" class="btn btn-outline-secondary col" value="4">4</button>
    <button type="button" class="btn btn-outline-secondary col" value="5">5</button>
    <button type="button" class="btn btn-outline-secondary col" value="6">6</button>
    <button type="button" class="btn btn-outline-primary col" value="-">-</button>
  </div>
  <div class="row">
    <button type="button" class="btn btn-outline-secondary col" value="1">1</button>
    <button type="button" class="btn btn-outline-secondary col" value="2">2</button>
    <button type="button" class="btn btn-outline-secondary col" value="3">3</button>
    <button type="button" class="btn btn-outline-primary col" value="x">x</button>
  </div>
  <div class="row">
    <button type="button" class="btn btn-outline-secondary col mod" value="%">mod</button>
    <button type="button" class="btn btn-outline-secondary col" value="0">0</button>
    <button type="button" class="btn btn-outline-secondary col" value=".">.</button>
    <button type="button" class="btn btn-outline-primary col" value="/">&divide;</button>
  </div>
  <div class="row">
    <button type="button" class="btn btn-outline-success col-8" value="=">=</button>
    <button type="button" class="btn btn-outline-primary col-3" value="+-">+/-</button>
  </div>
</div>

3.计算器的附加CSS样式。

.input-screen {
  background-color: rgb(195, 247, 247);
  font-size: 2vw;
}

.calculator-area {
  width: 70%;
  height: 90%;
  margin: 6%;
  padding: 3%;
  background-color: #dfdddd;
}

.history-screen {
  background-color: #c7c7c7;
  font-size: 1.6vw;
  max-width: 50%;
}

.row {
  margin: 1%;
  padding: 1%;
}

.btn {
  margin: 1%;
  font-size: xx-large;
}

.reset {
  font-size: 15px;
  font-weight: bolder;
}

.mod {
  font-size: medium;
  font-weight: bolder;
}

.btn-outline-secondary {
  background: linear-gradient(to right, #000000 0%, #000000 50%, #ffffff 50%, #ffffff 100%);
  background-size: 200% 100%;
  background-position: 100% 0;
  transition: background-position 0.1s;
  -webkit-transition: all 1s;
  -moz-transition: all 1s;
  transition: all 1s;
  color: #000000;
}

.btn-outline-secondary:hover {
  background-position: 0 0;
}

.btn-outline-secondary:focus {
  color: #000000;
}

.btn-outline-danger {
  background: linear-gradient(to right, #f87171 0%, #f87171 50%, #ff0000 50%, #ff0000 100%);
  background-size: 200% 100%;
  background-position: 100% 0;
  transition: background-position 0.1s;
  -webkit-transition: all 1s;
  -moz-transition: all 1s;
  transition: all 1s;
  color: #000000;
}

.btn-outline-danger:hover {
  background-position: 0 0;
}

.btn-outline-danger:focus {
  color: white;
}

.outer {
  margin: 0;
  padding: 0;
}

4.启用计算器。

<script src="js/app.js"></script> 

更新日志：

2022-09-25

• JS和CSS已更新

预览截图

简单 计算器应用程序风格 Bootstrap程序5