Add a JavaScript display to the Home page to count down from 140 characters. (Rails Tutorial, 2nd Ed, Chapter 10, Exercise 7)

Question

This exercise was a bit tricky. Figured I\'d post my solution to see if anyone did it differently or if there\'s anyone who knows a better way.

I\'m not sure on best pra

Answer 1

You can simplify it using CoffeeScript:

/app/assets/javascripts/microposts.js.coffee

updateCountdown = ->
  remaining = 140 - jQuery("#micropost_content").val().length
  jQuery(".countdown").text remaining + " characters remaining"

jQuery ->
  updateCountdown()
  $("#micropost_content").change updateCountdown
  $("#micropost_content").keyup updateCountdown

And as mentioned by jonyamo, you don't need to touch the application.js as the //= require_tree . already does the trick.