Small Validation Library

SmallFormValidation.js

const { converge, mergeAll } = require("ramda");

// Small validation function...
const validate = (validations) => {
  return converge((...results) => mergeAll(results), validations);
};

// Validators
const isGt4 = x => x > 4;
const isGT8 = x => x > 8;

// Values
const fieldValues = {
  a: 3,
  b: 9
};

const validateForm = validate([
  ({ a }) => ({ a: isGt4(a) ? true : "Needs to be greater than 4" }),
  ({ b }) => ({ b: isGT8(b) ? true : "Needs to be greater than 8" })
]);

console.log(validateForm(fieldValues));
// => { a: 'Needs to be greater than 4', b: true }