jdsutherland

jdsutherland

Modern Front-End Development for Rails (beta 6 pg 37) - Stimulus targets issues

I ran into issues around pg. 37 related to stimulus targets with the following console error:

day_toggle_controller.ts:6 Uncaught (in promise) TypeError: Cannot set property thingToHideTarget of # which has only a getter

I also noticed that the book src code dir stimulus/03 doesn’t work (click hide has no effect), but stimulus/04 does work. This leads me to believe the issue is related to targets but I haven’t done a thorough analysis. I’m not sure if this is likely to be versioning issues or what but it might be useful for anyone else trying to work through the book.

Most Liked

noelrappin

noelrappin

Author of Modern Front-End Development for Rails

This error is related to the Webpacker and Babel setup that changed in Webpacker 5.1, so it is related to targets in that targets cause the static elements to be used and the Babel setup has some trouble with that language feature.

it’s possible that some of the directories in the sample code weren’t updated properly, I’ll take a look.

Thanks!

msducheminjr

msducheminjr

This might be a change in how the released version of Stimulus 2.0 handles implicit properties, but I was getting the same error on line 6. Just removing the line with the property declaration caused the code to work.

// app/javascripts/controllers/day_toggle_controller.ts
import { Controller } from "stimulus"

export default class DayToggleController extends Controller {
  static targets = ["thingToHide"]

  // This was the offending line. Was expecting a different error when commented out, but it worked 
  // thingToHideTarget: HTMLElement

  toggle() {
    console.log('Click! Click! Boom!')
    this.thingToHideTarget.classList.toggle("is-hidden")
  }
}

I’m only on page 37 and don’t know Typescript or Stimulus, so I don’t know if this will cause problems later on.

Where Next?

Popular Pragmatic Bookshelf topics Top

brianokken
Many tasks_proj/tests directories exist in chapters 2, 3, 5 that have tests that use the custom markers smoke and get, which are not decl...
New
ianwillie
Hello Brian, I have some problems with running the code in your book. I like the style of the book very much and I have learnt a lot as...
New
sdmoralesma
Title: Web Development with Clojure, Third Edition - migrations/create not working: p159 When I execute the command: user=> (create-...
New
mikecargal
Title: Hands-On Rust (Chap 8 (Adding a Heads Up Display) It looks like ​.with_simple_console_no_bg​(SCREEN_WIDTH*2, SCREEN_HEIGHT*2...
New
lirux
Hi Jamis, I think there’s an issue with a test on chapter 6. I own the ebook, version P1.0 Feb. 2019. This test doesn’t pass for me: ...
New
cro
I am working on the “Your Turn” for chapter one and building out the restart button talked about on page 27. It recommends looking into ...
New
brunogirin
When trying to run tox in parallel as explained on page 151, I got the following error: tox: error: argument -p/–parallel: expected one...
New
brunogirin
When running tox for the first time, I got the following error: ERROR: InterpreterNotFound: python3.10 I realised that I was running ...
New
AufHe
I’m a newbie to Rails 7 and have hit an issue with the bin/Dev script mentioned on pages 112-113. Iteration A1 - Seeing the list of prod...
New
davetron5000
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
New

Other popular topics Top

AstonJ
We have a thread about the keyboards we have, but what about nice keyboards we come across that we want? If you have seen any that look n...
New
PragmaticBookshelf
Learn different ways of writing concurrent code in Elixir and increase your application's performance, without sacrificing scalability or...
New
AstonJ
We’ve talked about his book briefly here but it is quickly becoming obsolete - so he’s decided to create a series of 7 podcasts, the firs...
New
New
First poster: bot
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig. General-purpose programming language and toolchain for maintaini...
New
PragmaticBookshelf
Develop, deploy, and debug BEAM applications using BEAMOps: a new paradigm that focuses on scalability, fault tolerance, and owning each ...
New
AstonJ
If you’re getting errors like this: psql: error: connection to server on socket “/tmp/.s.PGSQL.5432” failed: No such file or directory ...
New
Margaret
Ask Me Anything with Mark Volkmann @mvolkmann On February 24 and 25, we are giving you a chance to ask questions of PragProg author M...
New
PragmaticBookshelf
Fight complexity and reclaim the original spirit of agility by learning to simplify how you develop software. The result: a more humane a...
New
mindriot
Ok, well here are some thoughts and opinions on some of the ergonomic keyboards I have, I guess like mini review of each that I use enoug...
New

Sub Categories: