# Class: VariableManager

Manages variables in the editor scope.

## Hierarchy

* **VariableManager**

## Implements

* [IVariableManager](../interfaces/ivariablemanager.md)

## Index

### Properties

* [editor](variablemanager.md#editor)
* [variables](variablemanager.md#variables)

### Methods

* [append](variablemanager.md#append)
* [appendExpression](variablemanager.md#appendexpression)
* [calculate](variablemanager.md#calculate)
* [calculateAll](variablemanager.md#calculateall)
* [init](variablemanager.md#init)

## Properties

###  editor

• **editor**: *[AuWizard](auwizard.md)*

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md).[editor](../interfaces/ivariablemanager.md#editor)*

A reference to an editor's instance.

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###  variables

• **variables**: *any* =  null

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md).[variables](../interfaces/ivariablemanager.md#variables)*

An object containing variables for the editor config.

## Methods

###  append

▸ **append**(`name`: string, `value`: any, `updateScope`: boolean): *Promise‹void›*

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md)*

Appends a new variable to the `vars` object or updates an existing variable.

**Parameters:**

Name | Type | Default | Description |
------ | ------ | ------ | ------ |
`name` | string | - | The name of the variable. |
`value` | any | - | The value of the variable. |
`updateScope` | boolean | true | If `true`, runs scope recompilation so that widgets get updated parameters.  |

**Returns:** *Promise‹void›*

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###  appendExpression

▸ **appendExpression**(`name`: string, `value`: string): *Promise‹any›*

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md)*

Appends a new expression to the editor's variables or updates an existing variable.

You can use this method when you need to calculate the value of an expression.

**Parameters:**

Name | Type | Description |
------ | ------ | ------ |
`name` | string | The name of the variable. |
`value` | string | The expression of the variable. |

**Returns:** *Promise‹any›*

The calculated value of the expression.

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###  calculate

▸ **calculate**(`name`: string): *any*

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md)*

Gets a variable by its name and calculates its value.

**Parameters:**

Name | Type | Description |
------ | ------ | ------ |
`name` | string | The variable name. |

**Returns:** *any*

The calculated value of the variable.

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###  calculateAll

▸ **calculateAll**(): *object*

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md)*

Calculates all the editor's variables.

**Returns:** *object*

A dictionary of calculated variable values.

* \[ **name**: *string*\]: any

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###  init

▸ **init**(`initialVars`: any): *void*

*Implementation of [IVariableManager](../interfaces/ivariablemanager.md)*

Initializes the variable manager with the defined editor's variables.

**Parameters:**

Name | Type | Description |
------ | ------ | ------ |
`initialVars` | any | The `vars` object defined in the editor's config.  |

**Returns:** *void*