我添加了

@font-face {
    font-family: 'Sanchez-Regular';
    src: local('Sanchez-Regular'),url(../assets/fonts/Sanchez/Sanchez-Regular.ttf) format('truetype');
}

而且效果非常好 就像我们在index.css中使用其他字体一样

我犯了这样的错误。

@import "https://fonts.googleapis.com/css?family=Open+Sans:300,300i,400,400i,600,600i,700,700i&subset=cyrillic,cyrillic-ext,latin-ext";
@import "https://use.fontawesome.com/releases/v5.3.1/css/all.css";

它以这种方式正常工作

@import url(https://fonts.googleapis.com/css?family=Open+Sans:300,300i,400,400i,600,600i,700,700i&subset=cyrillic,cyrillic-ext,latin-ext);
@import url(https://use.fontawesome.com/releases/v5.3.1/css/all.css);

我的感觉是，如果你在你的网站上有本地的字体，你应该能够使用CSS字体加载API在运行时为你做字体加载，而不使用CSS文件。这是我写的一个React组件。它是基于上面user-rebo的答案，但尝试在使用后卸载字体。它似乎可以在火狐和Chrome浏览器中运行。代码是:

import React, { useEffect, PropsWithChildren, useRef } from "react";

type FontFaceFormat =
  | "woff"
  | "woff2"
  | "truetype"
  | "opentype"
  | "embedded-opentype"
  | "svg";

type FontWrapperProps = {
  fontName: string;
  fontURL: string;
  fontFormat?: FontFaceFormat;
};

/*
 * The FontWrapper class. Takes a fontName (like "Andika"), a fontURL (which
 * should go to the website's public folder), and an optional font type. Usage
 * should be as simple as:
 *
 * <FontWrapper fontName="Andika" fontURL="/fonts/Andika-Regular.ttf.woff2">
 *   <p>This is some text</p>
 * </FontWrapper>
 *
 * Note: document.fonts is of type FontFaceSet, which should include the add() and
 * delete() methods. However, the TypeScript libraries for Visual Studio Code
 * miss these. That's why I have two instances of "document.fonts as any" -
 * to make those red lines go away.
 */

export default function FontWrapper({
  fontName,
  fontURL,
  fontFormat = "woff2",
  children,
}: PropsWithChildren<FontWrapperProps>) {
  const fontRef = useRef(null);

  useEffect(() => {
    const loadFont = async () => {
      const font = new FontFace(
        fontName,
        `url(${fontURL}) format("${fontFormat}")`,
        {}
      );
      const fontResult = await font.load();
      fontRef.current = fontResult;
      await (document.fonts as any).add(font);
    };

    const unloadFont = async () => {
      await (document.fonts as any).delete(fontRef.current);
    };

    loadFont();

    return () => {
      unloadFont();
    };
  }, []);

  return <div style={{ fontFamily: fontName }}>{children}</div>;
}

用法是:

<FontWrapper fontName="Andika" fontURL="/fonts/Andika-Regular.ttf.woff2">
  <p>This is some text</p>
</FontWrapper>

当使用不同的字体文件为正常/斜体字体风格时，您指定@font-face的方式可能需要根据入口点而不同。请看我的回答:

如果你选择将css文件直接链接到public/index.html，那么你通常可以使用一个字体家族名称和不同的字体风格的font-face:

@font-face {
  font-family: "FontName"; <---
  font-style: normal; <---
  font-weight: normal;
  src: url("path-to-assets/fonts/FontName.ttf") format("truetype");
}
@font-face {
  font-family: "FontName"; <---
  font-style: italic; <---
  font-weight: normal;
  src: url("path-to-assets/fonts/FontName-Italic.ttf") format("truetype");
}

/* Usage */
.text {
  font-family: FontName;
  font-style: normal;
}
.text-italic {
  font-family: FontName;
  font-style: italic;
}

如果你选择通过Js链接css文件进行捆绑，那么你需要为所有斜体字体设置一个不同的字体族名称，并使用正常的字体样式。

@font-face {
  font-family: "FontName"; <---
  font-style: normal; <---
  font-weight: normal; /* normal | 300 | 400 | 600 | bold | etc */
  src: url("path-to-assets/fonts/FontName.ttf") format("truetype");
}
@font-face {
  font-family: "FontNameItalic";
  font-style: normal; <----
  font-weight: normal; /* normal | 300 | 400 | 600 | bold | etc */
  src: url("path-to-assets/fonts/FontName-Italic.ttf") format("truetype");
}

/* Usage */
.text {
  font-family: FontName;
}
.text-italic {
  font-family: FontNameItalic;
}

这是为使用NX(nwrl) monorepo的人准备的，我在那里使用它时测试了这个，可能适用于其他CRA应用程序。 首先在assets/fonts文件夹中添加字体，如果没有，创建一个字体文件夹。

然后在你的主app.js/tsx 将此代码与现有的jsx代码一起添加

<style type="text/css">{`
    @font-face {
      font-family: 'MaterialIcons';
      src: url(${require('react-native-vector-icons/Fonts/MaterialIcons.ttf')}) format('truetype');
    }
    @font-face {
      font-family: 'MaterialCommunityIcons';
      src: url(${require('react-native-vector-icons/Fonts/MaterialCommunityIcons.ttf')}) format('truetype');
    }
    @font-face {
      font-family: 'Mulish-Bold';
      src: url(${require('../assets/fonts/Mulish-Bold.ttf')}) format('truetype');
    }
    @font-face {
      font-family: 'Your Font Name';
      src: url(${require('../assets/fonts/font-file-name.otf')}) format('truetype');
    }
  `}</style>

它应该看起来像这样，用Fragment标签包装

 <>
<style type="text/css">{`
        @font-face {
          font-family: 'MaterialIcons';
          src: url(${require('react-native-vector-icons/Fonts/MaterialIcons.ttf')}) format('truetype');
        }
        @font-face {
          font-family: 'MaterialCommunityIcons';
          src: url(${require('react-native-vector-icons/Fonts/MaterialCommunityIcons.ttf')}) format('truetype');
        }
        @font-face {
          font-family: 'Mulish-Bold';
          src: url(${require('../assets/fonts/Mulish-Bold.ttf')}) format('truetype');
        }
        @font-face {
          font-family: 'CircularStd-Book';
          src: url(${require('../assets/fonts/CircularStd-Book.otf')}) format('truetype');
        }
      `}</style>
   //Your JSX, or your main app level code
 </>

还有另一个步骤，在你的自定义webpack配置文件中，添加这些加载器，如果你没有，那么在你的父级，创建一个webpack.js文件-

你的webpack js应该是这样的

const getWebpackConfig = require('@nrwl/react/plugins/webpack');

function getCustomWebpackConfig(webpackConfig) {
  const config = getWebpackConfig(webpackConfig);
  const isProduction = webpackConfig.mode === 'production';

  if (!isProduction) {
    config.resolve.alias = {
      'react-native': 'react-native-web',
      'react-native-linear-gradient': 'react-native-web-linear-gradient',
      'react-native-localization': 'react-localization'
    };

    config.module.rules.push(
      {
        test: /\.ttf$/,
        loader: require.resolve('file-loader'),
        options: { esModule: false, name: 'static/media/[path][name].[ext]' },
      },
      {
        test: /\.otf$/,
        loader: require.resolve('file-loader'),
        options: { esModule: false, name: 'static/media/[path][name].[ext]' },
      },
      {
        test: /\.(js|jsx)$/,
        exclude: function (content) {
          return (
            /node_modules/.test(content) &&
            !/\/react-native-paper\//.test(content) &&
            !/\/react-native-vector-icons\//.test(content) &&
          
          );
        },
        use: {
          loader: require.resolve('@nrwl/web/src/utils/web-babel-loader.js'),
          options: {
            presets: [
              [
                '@nrwl/react/babel',
                {
                  runtime: 'automatic',
                  useBuiltIns: 'usage',
                },
              ],
            ],
            plugins: [
                ["module-resolver", {
                    "alias": {
                      "^react-native$": "react-native-web",
                      "react-native-linear-gradient": "react-native-web-linear-gradient",
                      "react-native-localization": "react-localization"
                    }
                  }]
            ],
          },
        },
      },
      
    );
  }

  return config;
}

module.exports = getCustomWebpackConfig;

您的babel加载器可能不同，但ttf和otf规则是重要的，需要添加。我使用这个与react原生的web功能。如果您的项目不需要别名，则可以删除别名。

感谢这个博客，它让我更好地理解了这个概念- https://blog.nrwl.io/step-by-step-guide-on-creating-a-monorepo-for-react-native-apps-using-nx-704753b6c70e

我添加了

@font-face {
    font-family: 'Sanchez-Regular';
    src: local('Sanchez-Regular'),url(../assets/fonts/Sanchez/Sanchez-Regular.ttf) format('truetype');
}

而且效果非常好 就像我们在index.css中使用其他字体一样