tauri-workspace/tauri/examples/communication/dist/communication.js

window.onTauriInit = function () {
  window.tauri.listen('rust-event', function (res) {
    document.getElementById('response').innerHTML = JSON.stringify(res)
  })
}

document.getElementById('log').addEventListener('click', function () {
  window.tauri.invoke({
    cmd: 'logOperation',
    event: 'tauri-click',
    payload: 'this payload is optional because we used Option in Rust'
  })
})

document.getElementById('request').addEventListener('click', function () {
  window.tauri.promisified({
    cmd: 'performRequest',
    endpoint: 'dummy endpoint arg',
    body: {
      id: 5,
      name: 'test'
    }
  }).then(registerResponse).catch(registerResponse)
})

document.getElementById('event').addEventListener('click', function () {
  window.tauri.emit('js-event', 'this is the payload string')
})