如何在没有npm/webpack的HTML文件中导入react模块

Question

如何在没有npm/webpack的HTML文件中导入react模块

4

我有一个静态的HTML文件，在其中我像这样获取React：

<script src="https://unpkg.com/react@16/umd/react.development.js" crossorigin></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js" crossorigin></script>
<script src="https://unpkg.com/prop-types@15.7.2/prop-types.js" crossorigin></script>
<script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>

然后我这样编写我的JavaScript：

<script type="text/babel">
class App extends React.Component {...}

并在页面上像这样初始化：

const domContainer = document.querySelector('#react-container');
ReactDOM.render(<App/>, domContainer);

我的问题是如何使用React组件库，比如https://www.npmjs.com/package/react-datepicker？

我发现它托管在https://unpkg.com/react-datetime-picker@2.7.1/dist/DateTimePicker.js，但如果我将它添加为

- Michael

尝试一下：从这里导入最后两个链接：https://cdnjs.com/libraries/react-datepicker，具体来说是.min.css和.min.js。 - johnmikelridzz

1个回答

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可以查看英文原文，
原文链接

- Matt Carlotta · Accepted Answer

使用react-datepicker时，发现它缺少一些核心依赖项，这些依赖项无法通过CDN获取。相反，一个备选方案是使用react-datetime。虽然它不够花哨，但只需稍加调整即可完成工作。

点击下面的运行代码片段按钮查看演示。

演示：点击选择日期按钮打开日期选择器，选择日期和/或时间，然后单击关闭按钮或单击日历以外的区域即可关闭日期选择器。

.calendar-container {
  width: 260px;
}

.container {
  padding: 20px;
}

.date-button {
  width: 100%;
  border-radius: 2px;
}

.form-control {
  display: none;
}

.rdtDays, .rdtTime {
  border: 1px solid #ebebeb;
}

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta name="theme-color" content="#000000">
    <title>React App</title>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/react/16.8.6/umd/react.development.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.6/umd/react-dom.development.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.1/moment.min.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/react-datetime/3.0.0/react-datetime.min.js"></script>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/react-datetime/3.0.0/css/react-datetime.min.css" rel="stylesheet" type="text/css">
    <link href="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/css/uikit.min.css" rel="stylesheet" type="text/css">
  </head>
  <body>
    <noscript>
      You need to enable JavaScript to run this app.
    </noscript>
    <div id="root"></div>
    <script type="text/babel">
      const { useEffect, useRef, useState, useCallback } = React;

      const App = () => {
        const wrapperRef = useRef();
        const [state, setState]=useState({ date: null, isOpen: false });

        const handleDateChange = useCallback(date => setState(prevState => ({ ...prevState, date })),[setState]);

        const openCalendar = useCallback(() => setState(prevState => ({ ...prevState, isOpen: !prevState.isOpen })), [setState]);

        const handleClickOutside = useCallback(({ target }) => {
          if (state.isOpen && wrapperRef && !wrapperRef.current.contains(target)) {
            setState(prevState => ({ ...prevState, isOpen: false }));
          }
        },
        [state.isOpen, wrapperRef]);

        useEffect(
          () => {
            document.addEventListener("mousedown", handleClickOutside);

            return () => {
              document.removeEventListener("mousedown", handleClickOutside);
            };
          },
          [handleClickOutside]
        );

        return (
         <div className="container">
           <div className="calendar-container" ref={wrapperRef}>
            <button className="uk-button uk-button-primary date-button" onClick={openCalendar}>{!state.isOpen ? "Select Date" : "Close"}</button>
            { state.isOpen && <Datetime input={false} onChange={handleDateChange}></Datetime>}
           </div>
           { state.date && <p>Selected Date: {moment(state.date).format("MM/DD/YYYY hh:mm a")}</p> }
         </div>
        );
      }

      ReactDOM.render(<App />,document.getElementById("root"));
    </script>
  </body>
</html>