CanvasRenderingContext2D: lineWidth property
The
CanvasRenderingContext2D.lineWidth
property of the Canvas 2D API sets the thickness of lines.
Note:
Lines can be drawn with the
stroke(),
strokeRect(),
and strokeText() methods.
Value
A number specifying the line width, in coordinate space units. Zero, negative, Infinity, and NaN values are ignored. This value is 1.0 by default.
Examples
Changing line width
This example draws a line and a rectangle, using a line width of 15 units.
HTML
html
<canvas id="canvas"></canvas>
JavaScript
js
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
ctx.lineWidth = 15;
ctx.beginPath();
ctx.moveTo(20, 20);
ctx.lineTo(130, 130);
ctx.rect(40, 40, 70, 70);
ctx.stroke();
Result
More examples
For more examples and explanation about this property, see Applying styles and color in the Canvas Tutorial.
Specifications
Browser compatibility
See also
- The interface defining this property:
CanvasRenderingContext2D CanvasRenderingContext2D.lineCapCanvasRenderingContext2D.lineJoin- Applying styles and color