Change back button icon

[maggie001]

How do I keep just an icon (no text) for the back button for one specific page on both iOS and Android?

[raymondativie]

I just equate the backButtonText to an empty string ' ' (note the space)
the file is at app.ts or app.js depends on if you are using typescript or not

ionicBootstrap(MyApp, null, {
    backButtonText: ' '
})