使用REST API和javascript前端（如Angular）进行模型验证的最佳实践

I'm transitioning towards more responsive front-end web apps and I have a question about model validation. Here's the set-up: the server has a standard REST API for inserting, updating, retrieving, etc. This could be written in Node or Java Spring, it doesn't matter. The front-end is written with something like Angular (or similar).I'm transitioning towards more responsive front