// this symbol can be used to visualize polyline
// features or the outline of a fill symbol
var symbol = {
  type: "simple-line",  // autocasts as new SimpleLineSymbol()
  color: "lightblue",
  width: "2px",
  style: "short-dot"
};

Property Overview

Property Details

cap String

Specifies the cap style. The cap is the end node of a polyline, or the end of a line segment that does not connect with another segment of the same polyline.

See the table below for possible values.

Possible Value	Example
butt
round
square

Known Limitations

• This property does not persist when applied to a symbol used in a layer saved to a web map or portal item. See the web map specification for more details about properties that persist when a SimpleLineSymbol is saved to an ArcGIS Online or Portal item.

Possible Values:"butt"|"round"|"square"

Default Value:round

Example:

symbol.cap = "square";

color Colorautocast inherited

Autocasts from Object|Number[]|String

The color of the symbol. This can be autocast with an array of rgb(a) values, named string, hex string or an hsl(a) string, an object with r, g, b, and a properties, or a Color object.

Default Value:black

Examples:

// CSS color string
symbol.color = "dodgerblue";

// HEX string
symbol.color = "#33cc33";

// array of RGBA values
symbol.color = [51, 204, 51, 0.3];

// object with rgba properties
symbol.color = {
  r: 51,
  g: 51,
  b: 204,
  a: 0.7
};

declaredClass Stringreadonly inherited

Since: ArcGIS API for JavaScript 4.7

The name of the class. The declared class name is formatted as esri.folder.className.

join String

Specifies the join style. A join refers to the joint of a polyline, or the end of a line segment that connects to another segment of the same polyline. See the table below for possible values.

Possible Value	Example
bevel
miter
round

Possible Values:"miter"|"round"|"bevel"

Default Value:round

Example:

symbol.join = "bevel";

marker LineSymbolMarkerautocast

Since: ArcGIS API for JavaScript 4.16

Specifies the color, style, and placement of a symbol marker on the line.

Known Limitations

• This is not currently supported within a 3D SceneView.

Example:

// Places a blue diamond marker at the beginning of the line symbol
simpleLineSymbol.marker = {
   color: "blue",
   placement: "begin",
   style: "diamond"
}

miterLimit Number

Maximum allowed ratio of the width of a miter join to the line width. Miter joins can get very wide at sharp line angles; this can be visually unpleasant or interfere with cartography. In the example below, the width of the miter join is about 3.6 times the width of the line.

A miter limit of X means that a miter join can be at most X times as wide as the line itself. Beyond that threshold, it is replaced with a bevel join. Referring to the previous example, setting the miter limit to 3.6 or greater has no effect on the generated visuals; setting the miter limit to 3.5 or smaller causes the replacement with a bevel join.

Known Limitations

This property is currently not supported in 3D SceneViews.

Default Value:2

Example:

// Miter joins that would be twice as wide as the line itself are
// replaced by bevel joins.
symbol.miterLimit = 2;

style String

Specifies the line style. Possible values are listed in the table below:

Value	Description
dash
dash-dot
dot
long-dash
long-dash-dot
long-dash-dot-dot
none	The line has no symbol.
short-dash
short-dash-dot
short-dash-dot-dot
short-dot
solid

Known Limitations

This property is currently not supported in 3D SceneViews.

Possible Values:"dash"|"dash-dot"|"dot"|"long-dash"|"long-dash-dot"|"long-dash-dot-dot"|"none"|"short-dash"|"short-dash-dot"|"short-dash-dot-dot"|"short-dot"|"solid"

Default Value:solid

Example:

symbol.style = "short-dash-dot";

type Stringreadonly

The symbol type.

For SimpleLineSymbol the type is always "simple-line".

width Numberautocast inherited

Autocasts from Number|String

The width of the symbol in points. This value may be autocast with a string expressing size in points or pixels (e.g. 12px).

Default Value:0.75

Examples:

// width in points
symbol.width = 4;

// width in pixels
symbol.width = "2px";

// width in points
symbol.width = "4pt";

Method Overview

Method Details

clone(){SimpleLineSymbol}

Creates a deep clone of the symbol.

Returns:

Type	Description
SimpleLineSymbol	A deep clone of the object that invoked this method.

Example:

// Creates a deep clone of the graphic's symbol
var symLyr = graphic.symbol.clone();

fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from a product in the ArcGIS platform. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter:

json Object A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns:

Type	Description
*	Returns a new instance of this class.

toJSON(){Object}inherited

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns:

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.