mmmap/README.md

地图覆盖物api，兼容高德/百度

```js
import { createCoverage } from 'mmmap'

let coverage

/**
|--------------------------------------------------
| 覆盖物
|--------------------------------------------------
*/

// 创建点
coverage = createCoverage({ lng: 119, lat: 29 })

// 创建圆
coverage = createCoverage({ lng: 119, lat: 29, backgroundColor: 'rgba(0,0,0,0.4)', borderColor: 'black', borderWidth: 0.5, radius: 500 })

// 创建 polyLine
const points = [ {lng: 119, lat: 29}, {lng: 118, lat: 29}, {lng: 119, lat: 28} ]
coverage = createCoverage({ borderColor: 'black', borderWidth: 0.5, points })

// 创建 polygon
const points = [ {lng: 119, lat: 29}, {lng: 118, lat: 29}, {lng: 119, lat: 28} ]
coverage = createCoverage({ backgroundColor: 'rgba(0,0,0,0.4)', borderColor: 'black', borderWidth: 0.5, points })

/**
|--------------------------------------------------
| 事件
|--------------------------------------------------
*/

// 点击事件
coverage = createCoverage({ lng: 119, lat: 29, onClick: ()=>alert(1) })

// hover改变样式
coverage = createCoverage({ backgroundColor: 'rgba(0,0,0,0.4)', borderColor: 'black', borderWidth: 0.5, points, hoverStyle: {
  backgroundColor: 'red',
  borderColor: 'red',
  context: map // map 实例
} })
```