TinyPrefetch

A tiny prefetcher to early fetch API requests and reduce the critical call chain and increase app performance.

Usage

Install the package as a dependency: npm install @verivox/tiny-prefetch

import { SearchQuery, Url, Urls } from "@verivox/tiny-prefetch"

declare global {
    interface Window {
        responses: Urls
    }
}

class UrlSettings {
    private apiUrl = 'api.example.com'

    constructor(private query: Map<string, string>) {
    }

    public generateToken() {
        return 'i am a token that has been generated'
    }

    private listOfThings() {
        return new Url(
            `${this.apiUrl}/listOfThings`,
            { auth: this.generateToken }
        )
    }

    private validate() {
        return new Url(
            `${this.apiUrl}/name/${this.query.get('name')}`,
            { auth: 'long auth token' }
        )
    }

    public getUrls(): Url[] {
        return [
            this.listOfThings(),
            this.validate(),
        ]
    }
}

const urlList = new Urls(new UrlSettings(new SearchQuery(location).asMap()).getUrls())

window.responses = urlList

The results are saved as promise to window.responses - await those from your application to get the results when ready.

Why not use web workers instead?

Because web workers do a lot more, which adds unnecessary size to your application. If you only want to pre-cache some resources or calls, this library is all you need - if you need the other functionality that web workers provide, use them instead.

Development

We use typescript, which is transpiled to javascript.

Make sure that you create tests if necessary, which can be run via npm test.

What you should check before creating a merge request:

• [ ] npm test is green
• [ ] npm run lint is green
• [ ] npm run build has been run and the dist/-folder has been checked into the branch to be merged
• [ ] the documentation has been updated for feature changes

Authors

Written by Kim Almasan, Lars Kumbier helped a tiny bit.

Licence

Licensed under MIT by the Verivox GmbH