rundef

Remove undefined properties from object.

N.B. Does not remove null or falsy values, just undefined.

Install

$ npm install rundef
$ yarn add rundef

Usage

const rundef = require('rundef');
import rundef from 'rundef';

For the most accurate examples, see the test.js file

Basic

const input = {
  a: undefined,
  b: 1
}

rundef(input); // { b: 1 }

Advanced

rundef supports two options:

• mutate boolean - if truthy, the original object will be mutated; if falsy, a new object will be constructed and returned. Defaults to false
• recursive boolean | int - whether rundef should recursively process nested objects. If it's an integer, it will specify the number of nested layers, or levels, to process. If it is set to true, it will recursively process all layers. Defaults to 0, which is equivalent to false.

const input = {
  a: undefined,     // Level 0
  b: {
    c: 1,
    d: undefined,   // Level 1
    e: {
      f: undefined  // Level 2
    }
  }
}

const output = rundef(
  input,
  false, // mutate - whether to mutate the original object or return a new one
  1,     // recursive - whether to apply recursively
);

output;

{                   // Level 0
  b: {
    c: 1,           // Level 1
    e: {
      f: undefined  // Level 2 - Not removed as level 1 was specified
    }
  }
}

License