@reliance/feature-flags/src/error.js

A package for determining feature flag status based on environment variables or flag objects.

class PredicateNotAFunctionError extends Error {
  constructor(featureName) {
    super(`Value of "${featureName}" feature must be a predicate function`);
    this.name = "PredicateNotAFunctionError";
  }
}

class InvalidFeatureDefinition extends Error {
  constructor() {
    super(`Feature definitions must be an object and cannot be null`);
    this.name = "InvalidFeatureDefinition";
  }
}

module.exports = {
  PredicateNotAFunctionError,
  InvalidFeatureDefinition,
};