Tagging features

Tagging your features helps build smaller datafiles, so that your applications get to load only the minimum required features in the runtime.

Configuration

Every Featurevisor project needs to define a set of tags in the configuration file:

// featurevisor.config.js
module.exports = {
  tags: [
    "web",
    "mobile",

    // add more tags here...
  ],

  environments: [
    "staging",
    "production",
  ],
};

Defining features

Above configuration enables you to define your features against one or more tags as follows:

# features/my_feature.yml
description: My feature
tags:
  - web

# ...

Learn more about defining features.

Building datafiles

When building datafiles, Featurevisor will create separate datafiles for each tag:

$ tree dist
.
├── staging
│   ├── datafile-tag-web.json
│   └── datafile-tag-mobile.json
└── production
    ├── datafile-tag-web.json
    └── datafile-tag-mobile.json

Consuming datafile

Now from your application, you can choose which datafile to load:

// your-app/index.js
import { createInstance } from "@featurevisor/sdk";

const datafileUrl = "https://cdn.yoursite.com/production/datafile-tag-web.json"
const datafileContent = await fetch(datafileUrl).then(res => res.json());

const f = createInstance({
  datafile: datafileContent,
});

Learn more about SDKs.