Method to

packages/context/src/binding.ts:740–774

* Bind the key to a constant value. The value must be already available * at binding time, it is not allowed to pass a Promise instance. * * @param value - The bound value. * * @example * * ```ts * ctx.bind('appName').to('CodeHub'); * ```

(value: T)

   * ```
   */
  to(value: T): this {
    if (isPromiseLike(value)) {
      // Promises are a construct primarily intended for flow control:
      // In an algorithm with steps 1 and 2, we want to wait for the outcome
      // of step 1 before starting step 2.
      //
      // Promises are NOT a tool for storing values that may become available
      // in the future, depending on the success or a failure of a background
      // async task.
      //
      // Values stored in bindings are typically accessed only later,
      // in a different turn of the event loop or the Promise micro-queue.
      // As a result, when a promise is stored via `.to()` and is rejected
      // later, then more likely than not, there will be no error (catch)
      // handler registered yet, and Node.js will print
      // "Unhandled Rejection Warning".
      throw new Error(
        'Promise instances are not allowed for constant values ' +
          'bound via ".to()". Register an async getter function ' +
          'via ".toDynamicValue()" instead.',
      );
    }
    /* istanbul ignore if */
    if (debug.enabled) {
      debug('Bind %s to constant:', this.key, value);
    }
    this._source = {
      type: BindingType.CONSTANT,
      value,
    };
    this._setValueGetter(resolutionCtx => {
      return Binding.valueOrProxy(resolutionCtx, value);
    });
    return this;
  }

  /**
   * Bind the key to a computed (dynamic) value.