Traverse all the Nodes of a JSON Object Tree with JavaScript

Question

I\'d like to traverse a JSON object tree, but cannot find any library for that. It doesn\'t seem difficult but it feels like reinventing the wheel.

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Answer 1

We use object-scan for all our data processing needs now. It's very powerful once you wrap your head around it. Here is how you could do basic traversal

const objectScan = require('object-scan');

const obj = {
  foo: 'bar',
  arr: [1, 2, 3],
  subo: {
    foo2: 'bar2'
  }
};

objectScan(['**'], {
  filterFn: ({ key, value }) => {
    console.log(key, value);
  }
})(obj);
/* =>
[ 'subo', 'foo2' ] 'bar2'
[ 'subo' ] { foo2: 'bar2' }
[ 'arr', 2 ] 3
[ 'arr', 1 ] 2
[ 'arr', 0 ] 1
[ 'arr' ] [ 1, 2, 3 ]
[ 'foo' ] 'bar'
*/