https://stackoverflow.com/questions/32402327/how-can-i-force-external-links-from-browser-window-to-open-in-a-default-browser/62234915#62234915

Number one answer is not work for me，i solved the problem by the following step

1. Add shell on const {app, BrowserWindow} = require('electron')

const {app, BrowserWindow, shell} = require('electron')

1. Set nativeWindowOpen is true

function createWindow () {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 1350,
    height: 880,
    webPreferences: {
      nativeWindowOpen: true,
      preload: path.join(__dirname, 'preload.js')
    },
    icon: path.join(__dirname, './img/icon.icns')
})

1. Add the following listener code

  mainWindow.webContents.on('will-navigate', function(e, reqUrl) {
    let getHost = url=>require('url').parse(url).host;
    let reqHost = getHost(reqUrl);
    let isExternal = reqHost && reqHost !== getHost(wc.getURL());
    if(isExternal) {
      e.preventDefault();
      shell.openExternal(reqUrl, {});
    }
  })

reference https://stackoverflow.com/a/42570770/7458156 by cuixiping