yup-validation.ts

import {object, string, number, Schema } from 'yup';

interface Hash {
  [p: string]: string;
}

class FormSchema {
  constructor(protected schema: Schema<any>) {}

  protected _errors: Hash = {};
  public get errors() { return this._errors; }

  validate(data): boolean {
    this._errors = {};
    try {
      this.schema.validateSync(data, { abortEarly: false });
    } catch (e) {
      e.inner.forEach(oneError => {
        if (!this._errors[oneError.path]) {
          this._errors[oneError.path] = oneError.message;
        }
      });
    }
    return Object.keys(this._errors).length === 0;
  }
}

async function main() {
    const form = new FormSchema(object({
      name: string().required(),
      age: number().required().positive().integer(),
      email: string().email(),
      website: string().url(),
    }));
    
    const contact = {
        name: 'test',
        age: -100,
        email: 'asdasd'
    };
    console.log(form.validate(contact));
    // false
    console.log(form.errors);
    // { age: 'age must be a positive number', email: 'email must be a valid email' }
    contact.email = '[email protected]';
    contact.age = 10;
    console.log(form.validate(contact));
    // true
};

main();