AJAX

Question 1

What are the key elements to implement AJAX logic in rails? ( 5 keys )

Answer 1

• Button ( For example show/update random number)
• HTML ( where this number will be shown)
• Route (with method type)
• Controller action ( Generates number )
• JS action inside controller ( which will update our html with our number)

Question 2

How to run alert() from the controller?

Answer 2

# view
button_to 'Alert', action_path, remote: true

controller
def action_name
render js: ‘alert(2)’
end

Question 3

How to run alert() through js partial?

Answer 3

# view
button_to 'Alert', action_path, remote: true

# controller 
def action_name
  render partial: 'partial_name'
end

# _partial_name.js.erb
alert()

Question 4

How to update existing code with rails?

Answer 4

Click the button, and update js and inside js send rails argument