google apps script - how to get value entered in UI created with the new HtmlService

Question

I can get/access the value of the UI elements using,

e.parameter.elementname or app.getElementById(id) 

if i create UI using UiApps or GUI builder like,

app.add(app.loadComponent("MyGui"));
app.getElementbyId('textbox1').setText("Hi");

If i use, HtmlService.createHtmlOutputFromFile('myPage'); How can i get the values entered in the html form - elements ?

Answer 1

As an alternative to client-side JavaScript, you can also create simple forms that submit to the doPost() handler which then processes the data. I created a sample script to demonstrate: Run, Source