Responsive NavBar like StackOverflow-CodePudding

I am trying to create a responsive navigation bar, similar to the one on Stack Overflow. I have attached an image of the layout I'm trying to achieve.

For simplicity, I added some values to make it easier to follow. There is the outer div that encapsulates the whole page, outer-wrapper and the main div that encapsulates the main content (navigation bar, main content, and footer), main-wrapper.

Now suppose that outer-wrapper is 1000px wide and main-wrapper is 800px wide, then there is 100px of buffer on the left and right side. When the window shrinks, I want the buffer to be used up before any of the main content changes.

CSS

    .outer-wrapper {
        width:  100%;
    }

    .main-wrapper {
        width: 800px;
        display: flex;
        flex-direction: column;
        margin-left: auto;
        margin-right: auto;
        position: relative;
    }
    .nav-home {
        position: fixed;
        top: -30px;
        left: -30px;
        height: 60px;
        width: 100%;
        padding: 20px 20px 0px 20px;
        display: flex;
        justify-content: space-around;
    }
}

HTML

    <div class='outer-wrapper'>
      <div class='main-wrapper'>
        <div class='nav-bar'>...</div>
        <div class='main-content'>...</div>
        <div class='footer'>...</div>
      </div>
    </div>

The problem is when the window shrinks to match the width of main-wrapper at 800px, there is still a left and right margin in the navigation bar. How would I ensure the width of the navigation bar matches the width of the main content and footer when the left and right margin is shrunk to 0?

Thanks.

CodePudding user response：

I stripped out some of your styles from the .nav-bar class and it seems to be performing as you require - am I missing something?

I've added colours to help visualise the resizing.

.outer-wrapper {
    background-color: yellow;
    width:  100%;
}

.main-wrapper {
    background-color: blue;
    width: 800px;
    display: flex;
    flex-direction: column;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

.nav-bar {
    background-color: red;
    justify-content: space-around;
}

.main-content {
  background-color: green;
}

.footer {
  background-color: purple;
}

<div class='outer-wrapper'>
  <div class='main-wrapper'>
    <div class='nav-bar'>Nav Bar</div>
    <div class='main-content'>Main Content</div>
    <div class='footer'>Footer</div>
  </div>
</div>

CodePudding user response：

.outer-wrapper {
        width: 100%;
      }

      .main-wrapper {
        width: 800px;
        display: flex;
        flex-flow: row wrap;
        font-weight: bold;
        text-align: center;
        margin: 0 auto;
      }

      .main-wrapper > * {
        padding: 10px;
        flex: 1 100%;
      }

      .nav-bar {
        background: tomato;
      }

      .footer {
        background: lightgreen;
      }

      .main-content {
        background: deepskyblue;
      }

      .aside-1 {
        background: gold;
      }

      .aside-2 {
        background: hotpink;
      }

      @media all and (min-width: 600px) {
        .aside {
          flex: 1 0 0;
        }
      }

      @media all and (min-width: 800px) {
        .main-content {
          flex: 3 0px;
        }
        .aside-1 {
          order: 1;
        }
        .main-content {
          order: 2;
        }
        .aside-2 {
          order: 3;
        }
        .footer {
          order: 4;
        }
      }

      body {
        padding: 2em;
      }

<div >
      <div >
        <nav >Navbar</nav>
        <main >content</main>
        <aside >aside 1</aside>
        <aside >aside 2</aside>
        <footer >footer</footer>
      </div>
    </div>

this is the code that I made, hopefully it will help you and what you expect