lit/lit

[labs/context] Allow multiple provider contexts to be added at the same time

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#3,573 opened on Jan 17, 2023

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Good First Issue

Description

Should this be an RFC?

  • This is not a substantial change

Which package is this a feature request for?

Context (@lit-labs/context)

Description

It would be useful to be able to provide multiple contexts at the same time; allowing a provider component to be instantiated the same way but with a dynamic array of contexts

  private provider = new MultiContextProvider(this, [
    [loggerContext, {
      log: (msg) => {
        console.log(`[my-app] ${msg}`);
      },
    }],
    [themeContext, myTheme],
    [apiContext, myAPI], 
  ]);

Alternatives and Workarounds

It's possible to create a separate provider for every injected service.

Contributor guide

Tech stack
typescriptjavascript
Domain
frontend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Knowledge of Lit's context APITypeScriptWeb components basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Start by examining the existing ContextProvider class in packages/labs/context/src/context provider.ts to understand how a single context is provided. Then design a MultiContextProvider that accepts an array of [context, value] pairs and extends the provider functionality. Implement the class and ensure it properly registers and updates multiple contexts. Write unit tests in the corresponding test directory. Check if any related discussions exist in the issue comments for additional design considerations.
[labs/context] Allow multiple provider contexts to be added at the same time · lit/lit#3573 | Good First Issue