I've recently learned BEM & SASS, and I'd like to know if my BEM syntax is correct. I'm trying to create just the header of this page: https://blackrockdigital.github.io/startbootstrap-agency/

Are there any differences you would make to my class names? I get very confused about how to deal with elements when they are nested within other elements. I find that I often want to chain elements, like class="header__navbar__logo", but I've heard this is not good BEM.

<header class="header">
    <div class="header__navbar">
        <div class="container">
          <h1 class="header__logo">Start Bootstrap</h1>
          <ul class="header__navigation">
            <li class="header__nav-item"><a class="header__nav-link" href="#">Services</a></li>
            <li class="header__nav-item"><a class="header__nav-link" href="#">Portfolio</a></li>
            <li class="header__nav-item"><a class="header__nav-link" href="#">About</a></li>
            <li class="header__nav-item"><a class="header__nav-link" href="#">Team</a></li>
            <li class="header__nav-item"><a class="header__nav-link" href="#">Contact</a></li>

    <div class="header__content">
      <h1 class="heading-primary">
        <span class="heading-primary--main">Welcome To Our Studio!</span>
        <span class="heading-primary--sub">It's Nice To Meet You</span>
      <a class="btn btn-yellow" href="#"></a>
  • \$\begingroup\$ In my opinion, the real question you should ask yourself is "do I really need all these class selectors". Only declare IDs and classes when you need them. I think using class names for the <li> AND the <a> tags is not necessary. \$\endgroup\$ – Dennis Fink May 12 '19 at 1:44

Well, if you are using Bootstrap, you should not alter the classes that Framework is using, like navabar for example.

The basic with BEM is that you should chain classes in a way to create a meaningful hierarchy, like in a component, where you have an object that contains everything else. Like that you leverage SASS nesting to create a component-like structure.

For example:


  <navbar class="navigationBar navbar">
    <div class="container">
      <div class="navigationBar--logo"></div>
        <ul class="navigationBar--navigation">
          <li class="navigationBar--navigation--item">
            <a class="navigationBar--navigation--item--link" href="#">Item-1</a>
            <a class="navigationBar--navigation--item--link" href="#">Item-2</a>
            <a class="navigationBar--navigation--item--link" href="#">Item-3</a>

 <section class="content">
    <div class="container">
      <div class="content--heading--primary">
        <span class="content--heading--primary--main">Welcome To Our Studio!</span>
        <span class="content--heading--primary--sub">It's Nice To Meet You</span>


In this case the SASS will be:

.navigationBar {
    &--logo { width:103px; }
    &--navigation {
        &--item {
            &--link {width:100px; } 

.content {
  &--heading--primary {
    width: 101px;
    &--main { width: 102px; }
    &--sub { width: 103px; }

Check the SASS code with SassMeister (https://www.sassmeister.com) to see how it turns to CSS

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