Map proxies
Description
JavaScript proxy objects don't work with maps because they have native properties that are not proxied. This library make them work.
Usage
const { mapHandler } = require('map-proxies')
const handler = {
get: (target, prop, receiver) => {
if (prop === 'foo') {
return 'bar'
}
return Reflect.get(target, prop, receiver)
}
}
const newHandler = mapHandler(handler)
const nativeProxy = new Proxy(new Map(), handler)
const mapProxy = new Proxy(new Map(), newHandler)
console.log(nativeProxy.foo)
// => bar
nativeProxy.forEach(() => {})
// => throws
// Uncaught TypeError: Method Map.prototype.forEach called on incompatible receiver #<Map>
// at Proxy.forEach (<anonymous>)
console.log(mapProxy.foo)
// => bar
mapProxy.forEach(() => {})
// okay
API
mapHandler(handler)
The input is a proxy handler.
Returns a new proxy handler which wraps the input in a handler which make proxies work with maps.