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Nick Gerleman af89315fd4 Fixup TypeScript with export maps (#1284 )

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1284

This makes TypeScript resolution play nicely with export maps, and converts the entrypoints to TypeScript.

We remove the non-export-map fallbacks as well, so the export maps are always followed.

Tests are moved to load yoga from its external export, testing the entrypoints.

This moves the only untyped bit to the binary wrapper, which another diff will move.

Reviewed By: yungsters

Differential Revision: D45713689

fbshipit-source-id: 228e6f2c9d53520230707a81e76c3c35fcd46de5

2023-05-09 22:21:01 -07:00

1.8 KiB

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yoga-layout

This package provides prebuilt JavaScript bindings for the Yoga layout engine. Both WebAssembly and asm.js variants are packaged, with the optimal loaded based on platform.

Usage

The default entrypoint provides an asynchronous loader function to return a Yoga instance.

import {loadYoga, Align} from 'yoga-layout';

const Yoga = await loadYoga();

const node = Yoga.Node.create();
node.setAlignContent(Align.Center);

An alternative synchronous API is provided for compatibility, but requires using asm.js in browsers instead of WebAssembly, leading to worse performance and larger assets.

import Yoga, {Align} from 'yoga-layout/sync';

const node = Yoga.Node.create();
node.setAlignContent(Align.Center);

Objects created by Yoga.<>.create() are not automatically garbage collected and should be freed once they are no longer in use.

// Free a config
config.free();

// Free a tree of Nodes
node.freeRecursive();

// Free a single Node
node.free();

Selecting WebAssembly or asm.js

For better performance and smaller packages, WebAssembly is preferred to asm.js where available. yoga-layout tries to provide the right default using export maps so that platforms which can take advantage of WebAssembly use it by default.

A specific entrypoint may be specified on platforms which do not understand export conditions.

import {loadYoga} from 'yoga-layout/wasm-async';

Contributing

Requirements

Emscripten SDK
CMake >= 3.13
(Optional) ninja, for faster builds

Building

git clone https://github.com/facebook/yoga.git
cd yoga/javascript
yarn install
yarn build

Testing

# Build and test all entrypoints
yarn test

# Build and test a specific entrypoint
yarn test:asmjs-sync

1.8 KiB Raw Blame History