Wails: window.backend.SomeStruct.SomeMethod is not a function

[bh90210]

Description

I have an issue when trying to use methods of structs in the frontend.

Let's say we have this main.go

package main

import (
  "github.com/leaanthony/mewn"
  "github.com/wailsapp/wails"
)

func basic() string {
  return "Hello World!"
}

func basic2() string {
  return "Hello World!"
}

type Testio struct {
    test2 int
}

func (t *Testio) Testio1() {
}

func (t *Testio) Testio2() {
}

func main() {

  js := mewn.String("./frontend/dist/app.js")
  css := mewn.String("./frontend/dist/app.css")

  app := wails.CreateApp(&wails.AppConfig{
    Width:  1024,
    Height: 768,
    Title:  "testio2",
    JS:     js,
    CSS:    css,
    Colour: "#131313",
  })
  app.Bind(basic)
  app.Bind(basic2)
  app.Bind(&Testio{})
  app.Run()
}

while serving, I try to check the methods are working via the console and I get:

VM1315:1 Uncaught TypeError: window.backend.Testio.Testio1 is not a function
    at <anonymous>:1:23

this is the log of when wails serve starts

INFO[0000] [Bind] Binding Go Functions/Methods          
INFO[0000] [Bind] Bound Function: main.basic()          
INFO[0000] [Bind] Bound Function: main.basic2()         
INFO[0000] [Bind] Bound Method: main.Testio.Testio1()   
INFO[0000] [Bind] Bound Method: main.Testio.Testio2()   

if then I remove the second method func (t *Testio) Testio2()
the first method works fine (see screenshots)

To Reproduce
Steps to reproduce the behaviour:

1. Initialise a new project (I have reproduced it with react and vue, but seems irrelevant)
2. make a struct with as least two methods
3. bind the struct and serve the app
4. go to browser's console, try the methods and see the error

Expected behaviour
Having all methods of a binded struct exported

Screenshots

System Details

| Name | Value |
| ----- | ----- |
| Wails Version | v0.17.15-pre |
| Go Version | go1.13 |
| Platform | linux |
| Arch | amd64 |
| GO111MODULE | on |
| GCC | 8.3.0 |
| Npm | v12.10.0 |
| Node | 6.10.3 |

[leaanthony]

I've identified the issue and got a fix. However there appears to be another related bug that needs to be fixed first. I'M ON IT! :joy:

[leaanthony]

Fixed by #245 - in develop.

[bh90210]

~I am afraid it didn't fix it :/~
it works fine!

for future reference
replace github.com/wailsapp/wails v0.17.15-pre => /path/to/wails/

:+1: