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pure-js-chart\n\npure js line-chart render to png ,no canvas or any browser apis, all in javascript\n\n纯粹使用js实现的一个线形图表，可以直接输出png，不使用canvas或者其他浏览器接口，只有js\n\n![demo chat](output.png)\n\n## usage\n\n```js\nconst chart = require('./chart').create({width: 500, height: 200});\nlet datas = [24, 57, 70, 100, 130, 120, 110, 170, 160, 110];\nlet pngArrayBuffer = chart.draw(datas);\n\n//save to file\nrequire('fs').writeFileSync('output.png', Buffer.from(pngArrayBuffer));\n//or covert to dataurl\nlet dataURL = 'data:image/png;base64,' + Buffer.from(pngArrayBuffer).toString('base64');\n\n```\n\nreact native example:https://snack.expo.io/Cs2ScHaBC\n\n```js\nimport React, { Component } from 'react';\nimport { Text, View, Image } from 'react-native';\nimport { create } from 'pure-js-chart';\nimport { Buffer } from 'buffer';\n\nconst chart = create({ width: 500, height: 200 });\n\nexport default class App extends Component {\n  constructor(props) {\n    super(props);\n\n    let datas = [24, 57, 70, 100, 130, 120, 110, 170, 160, 110];\n    let pngArrayBuffer = chart.draw(datas);\n    let dataURL =\n      'data:image/png;base64,' + Buffer.from(pngArrayBuffer).toString('base64');\n\n    this.state = {\n      img: dataURL,\n    };\n  }\n\n  render() {\n    return (\n      \u003cView\u003e\n        \u003cText\u003eHello, world!\u003c/Text\u003e\n        \u003cImage\n          resizeMode=\"contain\"\n          style={{ width: 300, height: 200 }}\n          source={{ url: this.state.img }}\n        /\u003e\n      \u003c/View\u003e\n    );\n  }\n}\n\n```\n\n## thanks to\n\n- [Xiaolin Wu's line algorithm](https://en.wikipedia.org/wiki/Xiaolin_Wu%27s_line_algorithm)\n- [Dr. Dobb's Journal.Bresenham's algorithm ](https://en.wikipedia.org/wiki/Bresenham%27s_line_algorithm)\n- [UPNG](https://github.com/photopea/UPNG.js)\n- [pako](https://github.com/nodeca/pako)\n\n## 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