npm包karekod-parser使用教程

随着前端技术的日益发展，我们需要处理各种数据类型和格式。其中，条形码和二维码是非常常见的格式。在这篇文章中，我们将介绍一个npm包，即karekod-parser，这是一个处理和分析条形码和二维码的工具。

什么是karekod-parser

karekod-parser是一个开源的npm包，它提供了一些方法来解析和分析条形码和二维码。它是运用纯JavaScript编写的，可以在Node.js和浏览器端使用。它支持多种常见的条形码和二维码格式，如EAN, CODE128, QR等等。

如何安装

你可以使用npm直接安装karekod-parser。

npm install karekod-parser

安装完成后，你可以导入它并使用它提供的方法。

const karekod = require('karekod-parser')

如何使用

对于解析和分析条形码和二维码的需求，karekod-parser提供了一些快速便捷的方法。

parse

parse方法是karekod-parser中最主要的方法之一，它可以将一个条形码或二维码字符串解析成一个包含类型，内容和原始字符串的对象。例如：

const karekodValue = 'https://www.baidu.com/'
const result = karekod.parse(karekodValue)
console.log(result)

输出结果：

{
  type: 'QR',
  value: 'https://www.baidu.com/',
  originalString: 'https://www.baidu.com/'
}

getType

getType方法可以获取条形码或二维码的类型，例如：

const karekodType = 'CODE39'
const result = karekod.getType(karekodType)
console.log(result)

输出结果：

{
  name: 'CODE39',
  code: '39'
}

create

create方法可以创建一个新的条形码或二维码。例如：

const karekodValue = 'https://www.baidu.com/'
const karekodType = 'QR'
const result = karekod.create(karekodValue, karekodType)
console.log(result)

输出结果：

{
  base64: 'data:image/png;base64,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[https://www.javascriptcn.com/post/6006735b890c4f7277583f66](https://www.javascriptcn.com/post/6006735b890c4f7277583f66)