Code

Drawing a 2D house with JavaScript

I share how to create a Javascript Canvas 2D house without using external libraries and what I learned by following the CanvasRenderingContext2D docs.

Zu Pixels

Apr 19, 2023 • 2 min read

The end result

Code

<!DOCTYPE html>
<html>
    <head>
        
    </head>
    <body>
        <canvas id="my-house" width="300" height="300" style="border:1px solid #d3d3d3;"></canvas>
        
        <script>
            var canvas = document.getElementById("my-house");
            const ctx = canvas.getContext('2d');

            ctx.lineWidth = 10;

            //Wall
            ctx.strokeRect(75, 140, 150, 110); //x, y, width, height

            //Door
            ctx.fillRect(130, 190, 40, 60);//x, y, width, height

            //Roof
            ctx.beginPath();
            ctx.moveTo(50, 140);// left most point
            ctx.lineTo(150,60); // line to top point
            ctx.lineTo(250,140); //line to right most point
            ctx.closePath(); // links starting point and end points
            ctx.stroke(); // adds a stroke to the invisible path
            ctx.fill(); // adds a fill to the path
        </script>
    </body>
</html>

Note that I merely modified the example from the Official docs and added some notes.

What I learned

Path

When using paths to draw triangles, if one already has 2 strokes, manually adding the 3rd stroke is not needed. Closing the path automatically adds the last stroke by connecting the path's starting and end points with a straight line.

Also, if one does not manually add a stroke/fill to a path nothing will be displayed.

Fill

Adding only a fill (no stroke) will result in a smaller shape than expected.