The graph component allows to show statistics data in graph mode.

Table of Contents

  1. Default Selectors
  2. HTML Examples
  3. Options
  4. Methods

Default Selectors

Elements with the class="ui-graph" attribute can be built as Graph widget.
Changing the value of data-graph="line" applies a variety of graph styles.
Graph's values can be defined static data-value="[1,2,5]" or can be defined by value() method.

HTML Examples

  • To use Graph, you must import tau.graph.js along with tau.js.
    To create a graph using the <ui-graph> element:

        <div class="ui-graph"


The options for a component can be defined as data-* attributes or passed as parameters to the constructor.

You can change an option for the component using the option method.


Option Input type Default value Description
data-graph string | null "line" Visible style of graph. Supported options: "line", "bar"
data-value string | null null Initial values of Graph widget
data-mode string | null "intermittent" This option determines how the new values will replaced values of Graph widget.
This option allows also value "continuous" which determine that new values will be appended to Graph
data-color string | null "#0097D8" This option determines color of line or bar which represents data
data-xlabel string | null "Number" Label of X axis
data-ylabel string | null "Values" Label of Y axis
data-xinit string | null "0" Initial value of Graph on X axis
data-yinit string | null "0" Initial value of Graph on Y axis
data-axis-x-type string | null "time" Defines type of values on X axis. Supported values: "time", "index"
data-axis-x-max-count number | null null Max number of data showing in serie
data-axis-x-unit string | null null The unit name for x axis values


To call a method on the component, use one of the existing APIs:

<script type="text/javascript" src="lib/tau/libs/tau.graph.js"></script>
<script type="text/javascript" src="lib/tau/libs/tau.js"></script>
<script> var graphElement = document.getElementsByClassName("ui-graph"), graph = tau.widget.Graph(graphElement); graph.value([1,4,3,5]); </script>


Method Description
string value(string? value) 

Gets or sets a value.


Gets or sets a value.

object value(number? value) 

Since: 5.5

The method returns the Graph values as object


Parameter Type Required/optional Default value Description
value number | array | null Optional null Widget accepts data series as array, eg. [1,2,4,5,8]
when Graph has attribute option-mode="continuous" is set then widget accept single value to append to graph.

Return value:

Type Description
string In the get mode, returns value as object.

Code example:

<script type="text/javascript" src="lib/tau/libs/tau.graph.js"></script>
<script type="text/javascript" src="lib/tau/libs/tau.js"></script>
<div class="ui-graph"></div> <script> var element = document.getElementsByClassName("ui-graph"), graphWidget = tau.widget.Graph(element, { mode: "continuous", graph: "line", color: "#FF0000", xlabel: "Number", ylabel: "Value", xinit: 0, yinit: 0, axisXType: "time", axisXUnit: "s" }), graphWidget.value(5); </script>