code.ts

figma.showUI(__html__)

figma.ui.resize(500, 600)

// main().then(res => figma.closePlugin(res))

main()

async function main() {
  const blobs = [];
  const { selection } = figma.currentPage;

  for (let node of selection) {
    const scale = node.exportSettings[0] ? node.exportSettings[0].constraint.value : 1; // Check export settings or default to 1
    const blobPromise = exportPostNodeAsJPG(node, scale);
    blobs.push([node.name, scale, blobPromise]);
  }

  const resolvedBlobs = await Promise.all(
    blobs.map(async ([nodeName, scale, blobPromise]) => [nodeName, scale, await blobPromise])
  );
  figma.ui.postMessage(resolvedBlobs);
  
  // return new Promise(res => {
  //   figma.ui.onmessage = () => res()
  // })
}

async function exportFrameAsJPG(frameNode, scale) {
  const options = {
    format: 'JPG',
    constraint: {
      type: 'SCALE',
      value: scale // Get the value from Figma's export setting
    }
  };
  const bytes = await frameNode.exportAsync(options);
  return new Uint8Array(bytes);
}

async function exportPostNodeAsJPG(node, scale) {
  const postFrame = node;
  if (!postFrame) {
    return;
  }
  try {
    const imageBytes = await exportFrameAsJPG(postFrame, scale);
    return imageBytes;
  } catch (error) {
    console.error('Error exporting frame as JPG:', error);
    throw error; // Rethrow the error to propagate it
  }
}

figma.ui.onmessage = async() => {
  main()  
}