electron/spec/fixtures/pages/storage/web_sql.html

<script>
  const {ipcRenderer} = require('electron')
  try {
    window.openDatabase('test', '1.0', 'test database', 65536)
    ipcRenderer.send('web-sql-response', null)
  } catch (e) {
    ipcRenderer.send('web-sql-response', e.message)
  }
</script>