Justify inner Flexbox items across full width of flex container - html

Question

I have a Flexbox in use for header navigation, the logo is aligned to the left and the ul items are aligned to the right as in a traditional style. Both the logo and the navigation links are flex items within a full width Flexbox, and I have given them both flex: 50%. The navigation links section is also a Flexbox (an inner Flexbox) to prevent the menu from stacking and instead behaving in a better responsive manner.
When I apply justify-content to that inner Flexbox, there is no change to the links, as if there is an overriding style or the property does not work on an inner text box. I should like the navigation links to equally divide themselves among the 50% of the screen width.
I've toyed with placing flex: auto on the items but can't keep it within the current layout by doing that, and I've tried fiddling with inline elements to see if I can remove any overriding property, but no cigar.
#nav {
display: flex;
flex: 50%;
align-items: center;
}
#logo {
margin-right: auto;
width: 50px;
height: auto;
}
#links {
margin-left: auto;
display: flex;
justify-content: space-between;
}
#links a {
text-decoration: none;
}
<nav id="nav">
<img id="logo" src="https://pngimage.net/wp-content/uploads/2018/06/logo-placeholder-png.png"/>
<ul id="links">
<li><a href="#">Link1<a></li>
<li><a href="#">Link2<a></li>
<li><a href="#">Link3<a></li>
<li><a href="#">Link4<a></li>
</ul>
</nav>

Answer 1

You were pretty close. Important changes I made were to set the width of the #links <ul> to 50% and add justify-content: space-between to the container #nav wrapper. A few other style changes to the ul so it doesnt have default margin and padding and I think it is behaving as you are expecting now..
#nav {
display: flex;
align-items: center;
justify-content: space-between;
}
#logo {
width: 50px;
flex: 0 0 50px;
}
#links {
width: 50%;
display: flex;
justify-content: space-between;
margin: 0;
padding: 0;
list-style: none;
}
#links a {
text-decoration: none;
}
<nav id="nav">
<img id="logo" src="https://pngimage.net/wp-content/uploads/2018/06/logo-placeholder-png.png"/>
<ul id="links">
<li>Link1</li>
<li>Link2</li>
<li>Link3</li>
<li>Link4</li>
</ul>
</nav>

Answer 2

I think you have problem with flex: 50%; CSS deceleration. It's not at proper place. I have re-write the html to use it properly and fixed the CSS according.
Here is the Modified CSS
#nav {
display: flex;
background: #eee;
}
#nav>#logo,
#nav>#links {
flex: 50%;
}
#logo img {
width: 50px;
height: auto;
}
#links {
display: flex;
justify-content: space-around;
list-style-type: none;
}
#links a {
text-decoration: none;
}
<nav id="nav">
<div id="logo"><img src="https://pngimage.net/wp-content/uploads/2018/06/logo-placeholder-png.png" /> </div>
<ul id="links">
<li><a href="#">Link1<a></li>
<li><a href="#">Link2<a></li>
<li><a href="#">Link3<a></li>
<li><a href="#">Link4<a></li>
</ul>
</nav>
Also the code available at codepen https://codepen.io/mobarak/pen/jRjZxB/