使用点符号来设置/获取 Map 对象的值

dotToMap.js

const sourceMap = new Map()
const enhanceMap = new Proxy(sourceMap, {
    get: (obj, prop) => 
		obj.get(prop),
    set: (obj, prop, value) => {
		obj.set(prop, value)
		return true
	}
})

enhanceMap.testString = 'Yay'
console.log(enhanceMap.testString, sourceMap.get('testString'))