alp-node/src/params/ParamValueStringValidator.ts

framework based on koa 2

import ParamValueValidator from "./ParamValueValidator";

export default class ParamValueStringValidator<
  T extends string = string,
> extends ParamValueValidator<T | null | undefined> {
  notEmpty(): ParamValueValidator<T> {
    if (this.value == null || this.value.trim() === "") {
      this._error("notEmpty");
    }

    return this as ParamValueValidator<T>;
  }
}