React: Struggling to Get Margins Right for Navigation Bar Spacing

I recently tried my hand at following a tutorial for building a React app: React JS Tutorial for Beginners #1 – Build a website using React, Sass, Gulp and Node.js

After completing the tutorial, everything seemed to be working smoothly except for one thing - the spacing of the nav bar. The tutorial provided a code snippet on how to adjust the spacing:

Code: https://gist.github.com/kentonraiford/42cad2361cb6e47c7fd6b995013d50f4

Despite rewatching the video multiple times, I couldn't pinpoint where I had gone wrong. It seems like a simple fix, but I just can't seem to find the solution.

Link to file: https://github.com/kentonraiford/reactTutorial

htmlcssreactjssassreact-router

Answer №1

The issue with the css selector in your posted repository is that it has a lower precedence, resulting in the margin-right property being overridden.

header {
   nav ul li {
     margin: 0;
     padding: 0;
   }
}

Precedence is determined as follows:

Element, Pseudo Element: d = 1 – (0,0,0,1)
Class, Pseudo class, Attribute: c = 1 – (0,0,1,0)
Id: b = 1 – (0,1,0,0)
Inline Style: a = 1 – (1,0,0,0)

Thus, the selector you are using has a precedence of: (0, 0, 0, 4)

header {
  ul li {
    list-style-type: none;
    display: inline-block;
    margin-right: 20px;
  }
}

However, the selector you're attempting to use for adding margin-right has a precedence of (0, 0, 0, 3)

This means that the other selector takes precedence over the one you wish to apply for margin-right on the li element

To resolve this issue, you can create a more specific selector by adding a class or id to increase its precedence and override other selectors, or use !important (although not recommended)

For instance:

header {
  ul.header-list li {
    list-style-type: none;
    display: inline-block;
    margin-right: 20px;
  }
}

New Precedence: (0, 0, 1, 3)

For further information on precedence, visit:

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