mongoDB inspired JSON filters for JS

const compileFilter = require('monjo');
const query = {
  name: 'Foo Bar',
  age: {
    $gt: 5,
  },
  hobbies: {
    $elemMatch: {
      $not: {
        name: {
          $eq: 'music',
        },
      },
    },
  },
};
const filter = compileFilter(query);
const users = getUsers();
for (let validUser of users.filter(filter)) {
  // do stuff
}

• $eq - See mongoDB's documentation.
• $ne - See mongoDB's documentation.
• $gt - See mongoDB's documentation.
• $gte - See mongoDB's documentation.
• $lt - See mongoDB's documentation.
• $lte - See mongoDB's documentation.
• $in - See mongoDB's documentation.
• $nin - See mongoDB's documentation.
• $not - See mongoDB's documentation.
• $and - See mongoDB's documentation.
• $or - See mongoDB's documentation.
• $exists - See mongoDB's documentation.
• $size - See mongoDB's documentation.
• $all - See mongoDB's documentation.
• $elemMatch - See mongoDB's documentation.
• $startsWith - wraps over String.prototype.startsWith.
• $endsWith - wraps over String.prototype.endsWith.

Filters (nested, or otherwise) may be funtions that accept values and return a boolean-like value.

const compileFilter = require('monjo');
const query = {
  age(age) {
    return age % 10 === 0;
  },
};
const filter = compileFilter(query);
const users = getUsers();
for (let validUser of users.filter(filter)) {
  // do stuff
}