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CanvasRenderingContext2D: lineWidth property - Web APIs | MDN
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CanvasRenderingContext2D: lineWidth property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
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
| Specification |
|---|
| HTML # dom-context-2d-linewidth-dev |
Browser compatibility
Loading…
See also
- The interface defining this property:
CanvasRenderingContext2D CanvasRenderingContext2D.lineCapCanvasRenderingContext2D.lineJoin- Applying styles and color