Stepper progress bar - responsive css - css

Question

I would like to do a responsive stepper where in the lines in between steppers are connected to each step. Currently only workable with 4 steps, it becomes not responsive once it is more or less than 4 steps.
Here is the jsfiddle, currently workable with 4 steps.
.bullet.completed::after {
content: '';
position: absolute;
bottom: 10px;
height: 1px;
width: calc(133% - 21px);
background-color: #000;
margin-left: 7px;
}
I tried to change this part but it doesn't seem to work. Thanks for advance!
#stepProgressBar {
display: flex;
justify-content: space-between;
align-items: flex-end;
width: 90%;
margin: 0 auto;
margin-bottom: 40px;
}
.step {
text-align: center;
width: 20%;
position: relative;
}
.step-text {
margin-bottom: 10px;
color: #000;
}
.bullet {
border: 1px solid #000;
height: 20px;
width: 20px;
color: #000;
display: inline-block;
transition: background-color 500ms;
line-height: 20px;
}
.bullet.completed {
color: white;
background-color: #000;
}
.bullet.completed::after {
content: '';
position: absolute;
bottom: 10px;
height: 1px;
width: calc(133% - 21px);
background-color: #000;
margin-left: 7px;
}
/* Base styles and helper stuff */
.hidden {
display: none;
}
button {
padding: 5px 10px;
border: 1px solid black;
transition: 250ms background-color;
}
button:hover {
cursor: pointer;
background-color: black;
color: white;
}
button:disabled:hover {
opacity: 0.6;
cursor: not-allowed;
}
.text-center {
text-align: center;
}
.container {
max-width: 100%;
margin: 0 auto;
margin-top: 20px;
padding: 40px;
}
<div class="container">
<div id="stepProgressBar">
<div class="step">
<p class="step-text">Super Duper Long Title</p>
<div class="bullet completed">1</div>
</div>
<div class="step">
<p class="step-text">Long Long Title</p>
<div class="bullet completed">2</div>
</div>
<div class="step">
<p class="step-text">Loooong Title</p>
<div class="bullet completed">3</div>
</div>
<div class="step">
<p class="step-text">Loooong Title</p>
<div class="bullet">4</div>
</div>
</div>
</div>

Answer 1

Modify your .bullet.completed::after to display:flex, and set its width to 100% minus a modified margin-left value, which is equal to the width of the .bullet (20px):
.bullet.completed::after {
content: '';
position: absolute;
bottom: 10px;
height: 1px;
display:flex; /* Added */
width:calc(100% - 20px); /* Modified */
background-color: #000;
margin-left: 20px; /* Modified */
}
Here it is with seven steps:
const previousBtn = document.getElementById('previousBtn');
const nextBtn = document.getElementById('nextBtn');
const finishBtn = document.getElementById('finishBtn');
const content = document.getElementById('content');
const bullets = [...document.querySelectorAll('.bullet')];
const MAX_STEPS = 7;
let currentStep = 1;
nextBtn.addEventListener('click', () => {
bullets[currentStep - 1].classList.add('completed');
currentStep += 1;
previousBtn.disabled = false;
if (currentStep === MAX_STEPS) {
nextBtn.disabled = true;
finishBtn.disabled = false;
}
content.innerText = `Step Number ${currentStep}`;
});
previousBtn.addEventListener('click', () => {
bullets[currentStep - 2].classList.remove('completed');
currentStep -= 1;
nextBtn.disabled = false;
finishBtn.disabled = true;
if (currentStep === 1) {
previousBtn.disabled = true;
}
content.innerText = `Step Number ${currentStep}`;
});
finishBtn.addEventListener('click', () => {
location.reload();
});
#stepProgressBar {
display: flex;
justify-content: space-between;
align-items: flex-end;
width: 90%;
margin: 0 auto;
margin-bottom: 40px;
}
.step {
text-align: center;
width: 20%;
position: relative;
}
.step-text {
margin-bottom: 10px;
color: #000;
}
.bullet {
border: 1px solid #000;
height: 20px;
width: 20px;
color: #000;
display: inline-block;
transition: background-color 500ms;
line-height: 20px;
}
.bullet.completed {
color: white;
background-color: #000;
}
.bullet.completed::after {
content: '';
position: absolute;
bottom: 10px;
height: 1px;
width:calc(100% - 20px);
display:flex;
background-color: #000;
margin-left: 20px;
}
/* Base styles and helper stuff */
.hidden {
display: none;
}
button {
padding: 5px 10px;
border: 1px solid black;
transition: 250ms background-color;
}
button:hover {
cursor: pointer;
background-color: black;
color: white;
}
button:disabled:hover {
opacity: 0.6;
cursor: not-allowed;
}
.text-center {
text-align: center;
}
.container {
max-width: 100%;
margin: 0 auto;
margin-top: 20px;
padding: 40px;
}
<div class="container">
<div id="stepProgressBar">
<div class="step">
<p class="step-text">Super Duper Long Title</p>
<div class="bullet">1</div>
</div>
<div class="step">
<p class="step-text">Long Long Title</p>
<div class="bullet">2</div>
</div>
<div class="step">
<p class="step-text">Loooong Title</p>
<div class="bullet">3</div>
</div>
<div class="step">
<p class="step-text">Title</p>
<div class="bullet ">4</div>
</div>
<div class="step">
<p class="step-text">Title</p>
<div class="bullet ">5</div>
</div>
<div class="step">
<p class="step-text">Title</p>
<div class="bullet ">6</div>
</div>
<div class="step">
<p class="step-text">Title</p>
<div class="bullet ">7</div>
</div>
</div>
<div id="main">
<p id="content" class="text-center">Step Number 1</p>
<button id="previousBtn" class="hidden"></button>
<button id="nextBtn">Next</button>
<button id="finishBtn" class="hidden">Finish</button>
</div>
</div>