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

 

DOWNLOAD & DEMO

Here is the download link to the example code, so you don’t have to copy-paste everything.

 

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.

 

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HTML CSS GANTT CHART DEMO

Mon
Tue
Wed
Thur
Fri
Sat
Sun
First
Second
Third

 

 

PURE HTML CSS GANTT CHART

All right, let us now get into the steps of building a simple Gantt chart using HTML and CSS grid.

 

TUTORIAL VIDEO

 

PART 1) GANTT CHART HTML

gantt.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

gantt.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

gantt.css
/* (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

gantt.html
<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.

 

EXTRAS

That’s all for the tutorial, and here is a small section on some extras and links that may be useful to you.

 

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

Responsive Gantt Chart In HTML CSS (click to enlarge)

 

COMPATIBILITY CHECKS

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

 

LINKS & REFERENCES

 

THE END

Thank you for reading, and we have come to the end. I hope that it has helped you to better understand, and if you want to share anything with this guide, please feel free to comment below. Good luck and happy coding!

1 thought on “Very Simple Responsive Gantt Chart With Pure HTML CSS”

  1. This is great, and very easy to follow. I’ve been taking a Full Stack Java course for the last 6 months, and I was hoping to add a gantt chart to my project centered around tasks I can CRUD from. I’m still working through this one as I’m having trouble getting my css file linked. Did you ever have a chance to create a javascript file?

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