@strongnguyen/oidc-provider/lib/models/mixins/set_audience.js

OAuth 2.0 Authorization Server implementation for Node.js with OpenID Connect

const { InvalidTarget } = require('../../helpers/errors');

module.exports = (superclass) => class extends superclass {
  setAudience(audience) {
    if (Array.isArray(audience)) {
      if (audience.length === 0) {
        return;
      }
      if (audience.length > 1) {
        throw new InvalidTarget('only a single audience value is supported');
      }

      // eslint-disable-next-line no-param-reassign
      [audience] = audience;
    } else if (typeof audience !== 'string' || !audience) {
      throw new InvalidTarget();
    }

    this.aud = audience;
  }
};