Public Library

Validation Example App

An example of a single-class frontend app with constraint validation built with plain JavaScript

This app is accompanied by a tutorial. See also the project page. This app supports the following operations:

For playing with the app, you may first want to and then view it with . For observing the internal status and error messages, turn on the JavaScript console.

This JavaScript frontend data management app takes care of only one object type ("books") for which it supports the four standard data management operations (Create/Read/Update/Delete). It extends the minimal app (Part 1) by adding constraint validation (and some CSS styling), but it needs to be enhanced by adding further important parts of the app's overall functionality:

Part 3: Managing unidirectional associations between object types.
Part 4: Managing bidirectional associations between object types.
Part 5: Handling subtype (inheritance) relationships between object types.

You may also want to take a look at our Minimal App, without CSS styling and without validation.