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Strokes and Lines


Knowledge about line and stroke configuration parameters is very important, because AnyChart allows to configure almost any line you can see on the chart: Lines in charts, grids, tooltips and labels, and even tickmark lines.

The name of the method is always .line() or .stroke(). In this tutorial all line parameters and features are described.


Each line can be colored with a solid or gradient fill, you can set line thickness and opacity and use dashed strokes.

Typical line settings look like:

chartSeries.stroke('2 red 0.8);

The sample line chart below shows you the different line settings:

JsFiddle Playground


There are two types of line coloring "Solid" and "Gradient"

Solid Color

Solid color type is default for any object of Anychart and you don't need to use any special settings to apply Solid color. For more information see Color Management article.


Gradient Color

To color a line with a gradient transition you should set color keys, opacity, angle of coloring and stroke thickness.

        keys: ['.1 red', '.5 blue', '.9 green'],
        thickness: 5

Line Thickness

To change the thickness of a line set thickness through string in pixels before the color and separate it from color with a space:

series.stroke('3 red');

This way is not the only one to set stroke thickness. Here is the code with thickness, set through object:

        color: 'red',
        thickness: 5

Dashed Lines

You can make line or grid line dashed and tune dash properties:

series.stroke({color: 'yellow', dash: '2 2'});

JsFiddle Playground

Line Opacity

To change the opacity of a line use .opacity() attribute. The value is set as a ratio: 1 stands for opaque, and 0 - for transparent line. Opacity may be set though line and through object:

Opacity through line:

series.stroke('red 0.8');

Opacity through object:

        color: 'red', 
        opacity: 0.8
Caps and Joints

Caps and joints are special parameters that define how line endings and bends are drawn.

The caps attribute specifies the caps style to use in drawing lines. You can specify the following three types of caps: "none" (or "butt"), "round" and "square", as the following example shows:

The joint attribute specifies the joint style to use in drawing lines. It supports three types of joints: "miter", "round", and "bevel", as the following example shows: