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Overriding object's default getter operator

Let's say I have the following object in my JS code:

var myData = {
  "someWeirdPrefix_name": "John Doe",
  "someWeirdPrefix_age": 24,
  ...
}

Is there a way to override the default getter operator (.)? As in, if I write myData.name, I would like to get "John Doe" (thanks to the override). Basically I want to override the method so that I can take the key given, add the weird prefix to the key and then get the value. I know the easy approach would be to just clean my actual data and remove the prefix, but that's not acceptable in my use case. Is this actually possible to do for every property (not just name and age)?

about 4 years ago · Juan Pablo Isaza

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I suggest you create a proxy over the data object, and on the get handler, you can check if there is a key in myData including the dot notation key, if YES, get the value of that key.

const myData = {
  "someWeirdPrefix_name": "John Doe",
  "someWeirdPrefix_age": 24,
}

const handler = {
   get(target, prop, receiver) {
    return target[Object.keys(target).find(key => key.includes(prop))]
  }
}

const proxy = new Proxy(myData, handler);

console.log(proxy.name)

about 4 years ago · Juan Pablo Isaza Relatório

Responde à pergunta

Encontrar trabalhos remotos

Accepted Answer · 2022-08-31T05:19:09.114Z

Usually Proxy is used for that

const myData = {
  "someWeirdPrefix_name": "John Doe",
  "someWeirdPrefix_age": 24,
}

const newMyData = new Proxy(myData, {
  get(target, prop, receiver) {
    return target['someWeirdPrefix_' + prop];
  }
})

console.log(newMyData.name)

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182

Overriding object's default getter operator

2 Respostas

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Encontrar trabalhos remotos

Andres GPT