Is CSS treated differently in a Rails application?

There's something peculiar happening with two sets of identical html and css files that I have. One set is being loaded through Rails' index.html.erb file via a controller, while the other is running through my public folder as a control. The public index.html file displays perfectly fine:

However, when I run these exact same files in the rails index.html.erb file, things appear slightly off. The "BETA" text is positioned lower in the Rails build, and the navigation list ends up below the header element.

Admittedly, I'm still quite new to both CSS and Rails, so this issue might be common knowledge that has eluded me. I've tried looking for solutions online but haven't come across any similar problems. Any advice on how to resolve this would be greatly appreciated!

UPDATE: Below are links to view my index.html and style.css files on Pastebin. They're relatively small, perhaps taking a look at them could provide some insights:

HTML: http://pastebin.com/wyYEN92n

CSS: http://pastebin.com/60xMe9YG

UPDATE 2:

Upon inspecting the page source, I found these two lines:

<link href="/assets/application.css?body=1" media="all" rel="stylesheet" type="text/css" />
<link href="/assets/home.css?body=1" media="all" rel="stylesheet" type="text/css" />

It seems likely that something in these CSS files is causing the discrepancy. I'll delve deeper into this and share any findings.

UPDATE 3:

Interestingly, it appears that neither of those CSS files actually affect anything. I've included the contents of both in this pastebin: http://pastebin.com/pbHwEp4w

You'll notice they only contain commented-out code. However, I did observe something unusual in the page source - there are 2 html tags within the same file. I've shared this on Pastebin as well: http://pastebin.com/h4Rjqi4B

This has me wondering if this dual HTML structure could be contributing to the problem. Could this be the root cause?

Answer №1

Regarding edit #3: It appears that the content is being pulled from the default layout located in app/views/layouts/application.html.erb. By default, Rails will load this file and insert all of the view's content where <%= yield %> is specified. Any additional <html>, <head>, or other tags in the view file would be duplicated. Further information on layouts can be found here. Additionally, consider exploring the asset pipeline to organize your CSS files within the application.

As mentioned by Ernest, Rails simply serves the HTML/CSS files, so the framework itself does not impact how the browser displays the content. However, the sequence in which the content is presented to the browser does play a significant role.

Answer №2

When it comes to CSS, the browser is where it's interpreted, not the server. Therefore, the straightforward answer would be "no". However, there is a possibility that your styles may be rendered differently once they are integrated with the existing styles in the Rails app. Additionally, there could be variations in your HTML between the two. It's important to review the CSS used in the Rails app and remove any elements that could potentially impact your design negatively - or simply eliminate all of them altogether to ensure that your CSS file remains the sole one in the entire codebase.

Answer №3

If you're looking for a solution to this type of issue, try using the INSPECT method.

Simply utilize your browser's inspector tool to identify the CSS rules impacting a specific element. For example, if you're using Google Chrome:

  1. Right-click on one of your navigation bar items and choose Inspect Element
  2. In the new source code window, select either .logo-container or .nav
  3. Review the panel on the right side to view all currently applied CSS rules for that element
  4. You can also determine which file is applying each rule
  5. Still unsure?
  6. PROFIT from solving the problem!

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