Ajax updating html page tutorial undercover dating

10 Jan

CSS selectors refer to HTML document parts by either their pure HTML tag name, their id label proceeded by a pound sign, or class proceeded with a dot.We’ll use the index page for the Thing model as an example.The :id parameter is set from the router, and the controller renders the Java Script response and alerts the user that “The number is: 42.”And there’s the beauty of it. Unless you’re writing some very short Java Script responses, you won’t want to be putting Java Script directly in your controller.You didn’t have to write anything to handle an AJAX response. If we rename our default show template for Thing from erb to erb, we can drop our Java Script in there, remove the render command from the controller, and we get the same behavior.Unobtrusive Java Script is generally known as writing your Java Script outside of your HTML’s page structure so as to not pollute your HTML structure.Overall, I was quite surprised at how easy it is in Rails to have a dynamic website.Assuming you have a resource generated in Rails, let’s modify the show route to pop up an alert of the current ID set in a parameter. The show resource for Thing routes from /things/:id, so /things/1 would set the parameter :id to 1.

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The logical conclusion seems to be to learn a front-end Java Script framework, but I’ve never liked the idea of having to write a separate front end and back end to a website when it would be simplest to have just one code base for one site. But then I came across UJS in Rails, and it solved my need to have just one code base for website design.

The way Rails has incorporated AJAX does more than what my earlier research had suggested AJAX was for and what it could do.

The beauty of it is that I can run my Java Script from the server on the client’s browser without any complicated AJAX response processing. Now along with the benefit of having one code base, we also have j Query included in Rails.

I generally like to use the PATCH method for UJS requests.

Along with adding remote: true to my links, buttons, or forms, I also add method: :patch.