Web/API/WebGLRenderingContext/lineWidth

The WebGLRenderingContext.lineWidth() method of the WebGL API sets the line width of rasterized lines.

The webgl spec, based on the OpenGL ES 2.0/3.0 specs points out that the minimum and maximum width for a line is implementation defined. The maximum minimum width is allowed to be 1.0. The minimum maximum width is also allowed to be 1.0. Because of these implementation defined limits it is not recommended to use line widths other than 1.0 since there is no guarantee any user's browser will display any other width.

As of January 2017 most implementations of WebGL only support a minimum of 1 and a maximum of 1 as the technology they are based on has these same limits.

Syntax

void gl.lineWidth(width);

Parameters

width: A GLfloat specifying the width of rasterized lines. Default value: 1.

Return value

None.

Examples

Setting the line width:

gl.lineWidth(5);

Getting the line width:

gl.getParameter(gl.LINE_WIDTH);

Getting the range of available widths. Returns a Float32Array.

gl.getParameter(gl.ALIASED_LINE_WIDTH_RANGE);

Specifications

Specification	Status	Comment
WebGL 1.0The definition of 'lineWidth' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0The definition of 'glLineWidth' in that specification.	Standard	Man page of the OpenGL API.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`lineWidth`	Chrome No support No	Edge No support 12 — 79	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

No support: No support