async function init() {
  if (!navigator.gpu) {
    throw Error("WebGPU not supported.");
  }

  const adapter = await navigator.gpu.requestAdapter();
  if (!adapter) {
    throw Error("Couldn't request WebGPU adapter.");
  }

  // Create a GPUDevice
  const device = await adapter.requestDevice();

  // Set a label
  device.label = "my_label";

  // Get a label
  console.log(device.label);

  // …
}