Function inherits

lib/utils/utils.js:4–34

(cls, superCtor, statics, prototype)

// useful stuff
const inherits = function(cls, superCtor, statics, prototype) {
  // eslint-disable-next-line no-underscore-dangle
  cls.super_ = superCtor;

  if (!prototype) {
    prototype = statics;
    statics = null;
  }

  if (statics) {
    Object.keys(statics).forEach(i => {
      Object.defineProperty(cls, i, Object.getOwnPropertyDescriptor(statics, i));
    });
  }

  const properties = {
    constructor: {
      value: cls,
      enumerable: false,
      writable: false,
      configurable: true,
    },
  };
  if (prototype) {
    Object.keys(prototype).forEach(i => {
      properties[i] = Object.getOwnPropertyDescriptor(prototype, i);
    });
  }

  cls.prototype = Object.create(superCtor.prototype, properties);
};

// eslint-disable-next-line no-control-regex
const xmlDecodeRegex = /[<>&'"\x7F\x00-\x08\x0B-\x0C\x0E-\x1F]/;