Friday, 21 April 2017

Electron webContents executeJavaScript : Cannot execute script on second on loadURL

I am testing out Electron and specifically working with executeJavaScript. My project uses a POST request to sign into a website, then does a bit of work and loads a second URL using the same session. In this second URL, I need to execute JS but I am not sure what I am doing wrong.

In this example I created a dumbed down version that simulates going to two URL's and executing JS on the second. Any ideas on what is going on here?

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

let win;

function createWindow() {

  win = new BrowserWindow({width: 1000, height: 600})
  win.openDevTools();

  // First URL
  win.loadURL('https://www.google.com')

  // Once dom-ready
  win.webContents.once('dom-ready', () => {

    // THIS WORKS!!!
    win.webContents.executeJavaScript(`
      console.log("This loads no problem!");
    `)

    // Second URL
    win.loadURL('https://github.com/electron/electron');

    // Once did-navigate seems to function fine
    win.webContents.once('did-navigate', () => {

      // THIS WORKS!!! So did-navigate is working!
      console.log("Main view logs this no problem....");

      // NOT WORKING!!! Why?
      win.webContents.executeJavaScript(`

        console.log("I canot see this nor the affects of the code below...");

        const form = document.querySelectorAll('input.js-site-search-form')[0];

        const input = form.querySelectorAll('input.header-search-input')[0]

        input.value = 'docs';

        form.submit();

      `)

    })
  })
}

app.on('ready', createWindow );

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit();
  }
});



via Michael Bruce

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