function hookCreatingChain()

in public/dexie.js [567:587]

• 19 lines of code
• 8 McCabe index (conditional complexity)

  function hookCreatingChain(f1, f2) {
    // Enables chained events that takes several arguments and may modify first argument by making a modification and then returning the same instance.
    // This pattern is used in the hook("creating") event.
    if (f1 === nop) return f2;
    return function () {
      var res = f1.apply(this, arguments);
      if (res !== undefined) arguments[0] = res;
      var onsuccess = this.onsuccess, // In case event listener has set this.onsuccess
        onerror = this.onerror; // In case event listener has set this.onerror
      this.onsuccess = null;
      this.onerror = null;
      var res2 = f2.apply(this, arguments);
      if (onsuccess)
        this.onsuccess = this.onsuccess
          ? callBoth(onsuccess, this.onsuccess)
          : onsuccess;
      if (onerror)
        this.onerror = this.onerror ? callBoth(onerror, this.onerror) : onerror;
      return res2 !== undefined ? res2 : res;
    };
  }