Local Storage Property Binding

localstorage_property.ts

export function LocalStorageProperty(property:string) {
    return function(target: any, propertyKey: string | symbol) {
        var _ref_ = window['Reflect'];
        var meta, type;

        if(_ref_.getMetadata) {
            meta = _ref_.getMetadata('design:type', target, propertyKey);
            var result = /^function\s+([\w\$]+)\s*\(/.exec( meta.toString() )
            var fnName = result  ?  result[ 1 ]  :  '';
            if(fnName && fnName.length) {
                type = fnName.toLowerCase();
            }
        }

        Object.defineProperty(target, propertyKey, {
            get: function() {
                var val:any = localStorage.getItem(property);
                switch(type) {
                    case "boolean":
                        val = (val == "true" || val == "1");
                        break;
                    default:
                        break;
                }
                return val;
            },
            set: function(value:any) {
                localStorage.setItem(property, value)
            }
        })
    }
}