JavaScript getter for all properties

javascript firefox getter
arantius picture arantius · Jun 15, 2009 · Viewed 33k times · Source

Long story short: I'm in a situation where I'd like a PHP-style getter, but in JavaScript.

My JavaScript is running in Firefox only, so Mozilla specific JS is OK by me.

The only way I can find to make a JS getter requires specifying its name, but I'd like to define a getter for all possible names. I'm not sure if this is possible, but I'd very much like to know.

Answer

B T picture B T · Mar 20, 2016

Proxy can do it! I'm so happy this exists!! An answer is given here: Is there a javascript equivalent of python's __getattr__ method? . To rephrase in my own words:

var x = new Proxy({}, {
  get(target, name) {
    return "Its hilarious you think I have " + name
  }
})

console.log(x.hair) // logs: "Its hilarious you think I have hair"

Proxy for the win! Check out the MDN docs: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy

Works in chrome, firefox, and node.js. Downsides: doesn't work in IE - freakin IE. Soon.

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