Very Simple Responsive Gantt Chart With Pure HTML CSS

Welcome to a tutorial on how to create a Gantt Chart with pure HTML and CSS. Want to include a Gantt Chart in your project? Without using complicated and bloated libraries? Yes, it is possible with the modern CSS grid – Read on for an example!

 

 

TABLE OF CONTENTS

 

 

EXAMPLE CODE DOWNLOAD

Click here to download | Example on CodePen

Just click on “download zip” or do a git clone. I have released it under the MIT license, so feel free to build on top of it or use it in your own project.

 

SORRY FOR THE ADS...

But someone has to pay the bills, and sponsors are paying for it. I insist on not turning Code Boxx into a "paid scripts" business, and I don't "block people with Adblock". Every little bit of support helps.

Buy Me A Coffee Code Boxx eBooks

 

HTML CSS GANTT CHART DEMO

 

 

 

TUTORIAL VIDEO

 

PART 1) GANTT CHART HTML

<div class="gantt">
  <!-- (A) FIRST ROW : DAYS -->
  <div class="head">Mon</div> <div class="head">Tue</div>
  <div class="head">Wed</div> <div class="head">Thur</div>
  <div class="head">Fri</div> <div class="head">Sat</div>
  <div class="head">Sun</div>
 
  <!-- (B) FOLLOWING : TASKS -->
  <div style="background: #ffdddd; grid-row: 2; grid-column: 1 / span 2">
    First
  </div>
  <div style="background: #d6ffd8; grid-row: 3; grid-column: 3 / span 3">
    Second
  </div>
  <div style="background: #e2e5ff; grid-row: 4; grid-column: 5 / span 3">
    Third
  </div>
</div>

Yep, that’s all we need.

• <div class="gantt"> Container for the Gantt Chart.
• <div class="head"> The “header cells”. Here, we have Monday to Sunday – A total of 7 cells.
• <div>TASK</div> Self-explanatory, the individual tasks. Will explain more below.

 

 

PART 2) CONTAINER CSS

/* (A) GANTT CHART CONTAINER */
.gantt {
  /* (A1) GRID LAYOUT - 7 COLUMNS */
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
 
  /* (A2) "TIMELINE" */
  background: repeating-linear-gradient(
   to right, #f2f2f2, #ddd 2px, #fff 2px, #fff 14.25%
  );
}

• (A1) Captain Obvious to the rescue, set <div class="gantt"> into the grid layout. Since it is Mon-Sun, there are 7 columns in total.
• (A2) Using a linear-gradient “hack”, we draw the “timelines” in the background.

 

PART 3) HEADER CELLS

/* (B) CELLS */
/* (B1) SHARED CELLS */
.gantt div { padding: 10px; }
 
/* (B2) HEADER CELLS */
.gantt .head {
  text-align: center;
  font-weight: 700;
  color: #fff;
  background: #103a99;
}

Don’t think these need explanation, just some cosmetics for the header cells.

 

 

PART 4) TASK CELLS

<div style="background: #ffdddd; grid-row: 2; grid-column: 1 / span 2">
  First
</div>
<div style="background: #d6ffd8; grid-row: 3; grid-column: 3 / span 3">
  Second
</div>

Lastly, all we need is to insert the tasks themselves. This can be quite confusing if you have zero knowledge of the CSS grid, so I will leave a link below if you want to learn more.

• grid-row: N This task should be placed at this row in the grid.
• grid-column: X / span Y This task will start at column X, span across Y cells.

 

 

IT WORKS, BUT…

Yes, we can build a Gantt Chart using pure HTML and CSS only. But as you can see, this is pretty much for simple charts only. It quickly turns into a real pain if you have multiple tasks and a long timeline – Having to manually calculate the rows/columns/span is going to be nasty.

Some form of “automation” with Javascript is still preferred for massive charts – Maybe I will build one in the future.

 

INFOGRAPHIC CHEAT SHEET

 

COMPATIBILITY CHECKS

• CSS Grid – CanIUse
• Grid Row – CanIUse

This Gantt Chart will work on all modern “Grade A” browsers.

 

LINKS & REFERENCES

• How To Create Grid In HTML CSS – Code Boxx
• CSS Donut Chart – Code Boxx
• CSS Pie Chart – Code Boxx
• Bar Chart – Code Boxx