Traverse JSON Schema from bottom up. Allows altering of structure or reformatting to match other schema formats, even if the structure is immutable, as values return in onNode callback will be placed at the node's position in a newly formatted structure.

Given the following schema:

const SCHEMA = {
  type: 'object',
  properties: {
    title: {
      type: 'string'
    },
    actors: {
      type: 'array',
      items: {
        type: 'object',
        properties: {
          name: {
            type: 'string'
          },
          gender: {
            type: 'string'
          }
        }
      }
    }
  }
};

$ npm install --save jsonschema-nodewalker

const walkNodes = require('jsonschema-nodewalker');

To simply walk the nodes, we call:

walkNodes(SCHEMA, (node, meta) => {
  // `node` will contain the schema node we're currently on
  // `meta` will contain metadata about the current node, such as whether it is
  // required, whether it is an array item, as well as the structures that its
  // children returned from their onNode functions.
});