realizar captura con electron.js

screenshot-electron.js

const electron = require('electron')

function takeScreenshot () {
        electron.remote.getCurrentWindow().capturePage({
            x: 0,
            y: 0,
            width: 2000,
            height: 4000,
        }).then((img) => {
          dialog.showSaveDialog({ 
            title: 'save screenshot', 
            defaultPath: require('os').homedir(), 
            buttonLabel: 'Guardar', 
            filters: [ 
              { 
                name: 'Image Files', 
                extensions: ["png", "jpeg", "jpg"]
              } 
            ], 
            properties: [] 
          }).then(file => {
            if (!file.canceled) { 
              try {
                fs.writeFileSync(file.filePath.toString(), img.toPNG(), 'base64')
              } catch (error) {
                console.log(error)
              }
            }
          })
        })
      }