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@yjh1102/qrcode-gen

v0.1.0

Published

一个功能完善的二维码生成工具库,支持颜色定制、尺寸调整、Logo嵌入和多格式输出

Downloads

8

Readme

QRCode Generator - 二维码生成工具库

一个功能完善的二维码生成工具库,支持颜色定制、尺寸调整、Logo嵌入和多格式输出。

License: MIT

✨ 特性

  • 🎯 简单易用 - 3行代码即可生成二维码
  • 🎨 样式定制 - 自定义颜色、尺寸、边距
  • 🖼️ Logo嵌入 - 支持品牌Logo嵌入,自动处理尺寸
  • 📦 多格式输出 - Canvas、SVG、Base64 三种格式
  • 高性能 - 标准二维码生成 < 100ms
  • 🔒 容错可靠 - 支持 L/M/Q/H 四种容错级别
  • 📱 浏览器原生 - 纯前端实现,无需服务端
  • 🎓 TypeScript支持 - 完整的类型定义

📦 安装

NPM 安装

npm install @yjh1102/qrcode-gen

浏览器直接使用

在HTML中直接引入构建好的UMD版本(已包含所有依赖):

<!-- 引入库文件 -->
<script src="dist/qrcode-gen.min.js"></script>

<script>
  // 使用全局变量 QRCodeGen
  const canvas = await QRCodeGen.generateQRCode({
    content: 'https://example.com'
  });
  document.body.appendChild(canvas);
</script>

🚀 快速开始

基础使用 (ES模块)

import { generateQRCode } from '@yjh1102/qrcode-gen';

// 生成基础二维码
const canvas = await generateQRCode({
  content: 'https://example.com'
});

// 添加到页面
document.body.appendChild(canvas);

自定义样式

const canvas = await generateQRCode({
  content: 'https://example.com',
  size: 300,
  foregroundColor: '#0066CC',
  backgroundColor: '#FFFFFF',
  margin: 4
});

嵌入Logo

const canvas = await generateQRCode({
  content: 'https://example.com',
  size: 400,
  errorCorrectionLevel: 'H', // 使用高容错级别
  logo: {
    source: 'path/to/logo.png', // 支持 URL、File、Blob
    scale: 0.2,                 // Logo占比(最大20%)
    borderWidth: 4,             // Logo边框宽度
    borderColor: '#FFFFFF'      // Logo边框颜色
  }
});

多种输出格式

// Canvas 格式(默认)
const canvas = await generateQRCode({
  content: 'https://example.com',
  outputFormat: 'canvas'
});

// SVG 格式(矢量图形)
const svg = await generateQRCode({
  content: 'https://example.com',
  outputFormat: 'svg'
});
document.body.innerHTML = svg;

// Base64 格式(Data URI)
const base64 = await generateQRCode({
  content: 'https://example.com',
  outputFormat: 'base64'
});
const img = document.createElement('img');
img.src = base64;

📖 API 文档

generateQRCode(config)

生成二维码的主函数。

参数

| 参数 | 类型 | 必填 | 默认值 | 说明 | |------|------|------|--------|------| | content | string | ✅ | - | 要编码的文本内容 | | size | number | ❌ | 256 | 二维码尺寸(像素),最小100px | | errorCorrectionLevel | 'L'\|'M'\|'Q'\|'H' | ❌ | 'M' | 容错级别 | | foregroundColor | string | ❌ | '#000000' | 前景色 | | backgroundColor | string | ❌ | '#FFFFFF' | 背景色 | | logo | LogoConfig\|null | ❌ | null | Logo配置 | | outputFormat | 'canvas'\|'svg'\|'base64' | ❌ | 'canvas' | 输出格式 | | margin | number | ❌ | 4 | 边距(模块单位) |

Logo配置 (LogoConfig)

| 参数 | 类型 | 必填 | 默认值 | 说明 | |------|------|------|--------|------| | source | string\|File\|Blob | ✅ | - | Logo图像源 | | scale | number | ❌ | 0.2 | Logo占比(0-0.2) | | borderWidth | number | ❌ | 0 | 边框宽度(像素) | | borderColor | string | ❌ | '#FFFFFF' | 边框颜色 |

返回值

  • outputFormat: 'canvas'HTMLCanvasElement
  • outputFormat: 'svg'string (SVG XML)
  • outputFormat: 'base64'string (Data URI)

异常

抛出 GenerationError 及其子类:

  • ValidationError - 配置验证失败
  • TimeoutError - Logo加载超时(5秒)
  • LoadError - Logo加载失败
  • EncodingError - 二维码编码失败

🎯 容错级别说明

| 级别 | 容错率 | 使用场景 | |------|-------|---------| | L | ~7% | 干净环境,数据量优先 | | M | ~15% | 默认级别,平衡性能 | | Q | ~25% | 需要更高可靠性 | | H | ~30% | 嵌入Logo或可能损坏 |

💡 提示: 嵌入Logo时建议使用 H 级容错。

🌈 颜色支持

支持多种颜色格式:

  • HEX: #FF0000#F00
  • RGB: rgb(255, 0, 0)
  • 颜色名称: red, blue, green

⚠️ 对比度警告: 前景色和背景色对比度低于 3:1 时会发出警告(但仍可生成)。

📝 示例

查看 examples/ 目录获取完整示例:

🔧 开发

# 安装依赖
npm install

# 构建
npm run build

# 运行测试
npm test

# 代码检查
npm run lint

# 格式化代码
npm run format

📄 许可证

MIT

🤝 贡献

欢迎提交 Issue 和 Pull Request!

📮 联系方式

如有问题或建议,请提交 Issue