falcorViewValue.js

class MyController {
  // ... snip
  viewValue(path) {
    // getCache() returns a JSON fragment, so we need to parse the path
    const value = this.$parse(path)(this.model.getCache(path));
    if (typeof value !== 'undefined') {
      return typeof value === 'object' ? value.value : value;
    }
    
    // Cache miss - request the real value
    this.model.getValue(path)
      .subscribe(_ => this.$scope.$evalAsync());
  }
}