yoga-layout-wasm

yoga-layout webassembly module, for browser and node. fallback to asm.js in non-webassembly environment

Get Start

$ npm i yoga-layout-wasm --save

import Yoga from 'yoga-layout-wasm'

function test (yoga) {
  const Node = yoga.Node
  const root = Node.create();
  root.setWidth(500);
  root.setHeight(300);
  root.setJustifyContent(yoga.JUSTIFY_CENTER);

  const node1 = Node.create();
  node1.setWidth(100);
  node1.setHeight(100);

  const node2 = Node.create();
  node2.setWidth(100);
  node2.setHeight(100);

  root.insertChild(node1, 0);
  root.insertChild(node2, 1);

  root.calculateLayout(500, 300, yoga.DIRECTION_LTR);
  console.log(root.getComputedLayout());
  // {left: 0, top: 0, width: 500, height: 300}
  console.log(node1.getComputedLayout());
  // {left: 150, top: 0, width: 100, height: 100}
  console.log(node2.getComputedLayout());
  // {left: 250, top: 0, width: 100, height: 100}
}

const wasmFilePath = 'node_modules/yoga-layout-wasm/dist/yoga.wasm'

Yoga.init(wasmFilePath).then(test)

Single asm.js module

// *.js
import Yoga from 'yoga-layout-wasm/asm'

Yoga.init().then(yoga => {
  // ... test()
})

Webpack and Auto Fallback

// ... webpack.config.js
module.exports =  {
  // ... other config
  module: {
    // ... other module
    rules: [
      // ...other rules
      {
        test: /\.(wasm)$/,
        type: 'javascript/auto',
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[path][name].[md5:hash:base64:6].[ext]',
            },
          },
        ],
      }
    ],
  },
  resolve: {
    // ...
    alias: { // required in browser
      path: false,
      fs: false
    }
  }
};
// ...

// *.js
  typeof WebAssembly === 'undefined' ?
    import('yoga-layout-wasm/asm')
      .then(mod => mod.default.init())
      .then(test) :
    import('yoga-layout-wasm')
      .then(mod => mod.default.init(require('yoga-layout-wasm/dist/yoga.wasm')))
      .then(test);

Examples

$ npm run example:node
$ npm run example:html
$ npm run example:node:asm