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!

ⓘ I have included a zip file with all the source code at the start of this tutorial, so you don’t have to copy-paste everything… Or if you just want to dive straight in.

 

 

TABLE OF CONTENTS

 

 

QUICK NOTES

If you spot a bug, feel free to comment below. I try to answer short questions too, but it is one person versus the entire world… If you need answers urgently, please check out my list of websites to get help with programming.

 

EXAMPLE CODE DOWNLOAD

Click here to download all the example source code, I have released it under the MIT license, so feel free to build on top of it or use it in your own project.

 

CSS GANTT CHART DEMO

 

 

 

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 totally 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.

 

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
• Example on CodePen – Pure CSS Gantt Chart