tauri-workspace/examples/navigation/public/index.js

const routeSelect = document.querySelector('#route')
const link = document.querySelector('#link')

routeSelect.addEventListener('change', (event) => {
  link.href = event.target.value
})

document.querySelector('#go').addEventListener('click', () => {
  window.location.href = (window.location.origin + '/' + routeSelect.value)
})