# Use system dialogs

### The `dialog` module in Electron allows you to use native system dialogs for opening files or directories, saving a file or displaying informational messages.

This is a main process module because this process is more efficient with native utilities and it allows the call to happen without interrupting the visible elements in your page's renderer process.

Open the full API documentation (opens in new window) in your browser.

## Open a File or Directory

In this demo, the `ipc` module is used to send a message from the renderer process instructing the main process to launch the open file (or directory) dialog. If a file is selected, the main process can send that information back to the renderer process.

##### Renderer Process

    const {ipcRenderer} = require('electron')

    const selectDirBtn = document.getElementById('select-directory')

    selectDirBtn.addEventListener('click', (event) => {
      ipcRenderer.send('open-file-dialog')
    })

    ipcRenderer.on('selected-directory', (event, path) => {
      document.getElementById('selected-file').innerHTML = `You selected: ${path}`
    })

##### Main Process

    const {ipcMain, dialog} = require('electron')

    ipcMain.on('open-file-dialog', (event) => {
      dialog.showOpenDialog({
        properties: ['openFile', 'openDirectory']
      }, (files) => {
        if (files) {
          event.sender.send('selected-directory', files)
        }
      })
    })

## ProTip

The sheet-style dialog on macOS.

On macOS you can choose between a "sheet" dialog or a default dialog. The sheet version descends from the top of the window. To use sheet version, pass the `window` as the first argument in the dialog method.

    const ipc = require('electron').ipcMain
    const dialog = require('electron').dialog
    const BrowserWindow = require('electron').BrowserWindow

    ipc.on('open-file-dialog-sheet', function (event) {
      const window = BrowserWindow.fromWebContents(event.sender)
      const files = dialog.showOpenDialog(window, { properties: [ 'openFile' ]})
    })