## FractionEquationNode class

This class  specifies the fraction equation, consisting of a numerator and denominator separated by a fraction bar. The fraction bar can be horizontal or diagonal, depending on the fraction properties. The fraction equation is also used to represent the stack function, which places one element above another, with no fraction bar.

```javascript
class FractionEquationNode extends EquationNode;
```


## Constructors

| Constructor | Description |
| --- | --- |
| [constructor(EquationNode)](#constructor-equationnode-)| Constructs from a parent object convertible to this. |

## Properties

| Property | Type | Description |
| --- | --- | --- |
| [fractionType](#fractionType--)| EquationFractionType | This specifies the type of fraction ; the default is 'Bar'. |
| [startIndex](#startIndex--)| number | Readonly. Gets the start index of the characters. |
| [length](#length--)| number | Readonly. Gets the length of the characters. |
| [font](#font--)| Font | Readonly. Returns the font of this object. |
| [textOptions](#textOptions--)| TextOptions | Readonly. Returns the text options. |
| [parentNode](#parentNode--)| EquationNode | Specifies the parent node of the current node |
| [equationType](#equationType--)| EquationNodeType | Readonly. Get the equation type of the current node |

## Methods

| Method | Description |
| --- | --- |
| [getFractionType()](#getFractionType--)| <b>@deprecated.</b> Please use the 'fractionType' property instead. This specifies the type of fraction ; the default is 'Bar'. |
| [setFractionType(EquationFractionType)](#setFractionType-equationfractiontype-)| <b>@deprecated.</b> Please use the 'fractionType' property instead. This specifies the type of fraction ; the default is 'Bar'. |
| [isNull()](#isNull--)| Checks whether the implementation object is null. |
| [getStartIndex()](#getStartIndex--)| <b>@deprecated.</b> Please use the 'startIndex' property instead. Gets the start index of the characters. |
| [getLength()](#getLength--)| <b>@deprecated.</b> Please use the 'length' property instead. Gets the length of the characters. |
| [getFont()](#getFont--)| <b>@deprecated.</b> Please use the 'font' property instead. Returns the font of this object. |
| [getTextOptions()](#getTextOptions--)| <b>@deprecated.</b> Please use the 'textOptions' property instead. Returns the text options. |
| [setWordArtStyle(PresetWordArtStyle)](#setWordArtStyle-presetwordartstyle-)| Sets the preset WordArt style. |
| [getParentNode()](#getParentNode--)| <b>@deprecated.</b> Please use the 'parentNode' property instead. Specifies the parent node of the current node |
| [setParentNode(EquationNode)](#setParentNode-equationnode-)| <b>@deprecated.</b> Please use the 'parentNode' property instead. Specifies the parent node of the current node |
| [getEquationType()](#getEquationType--)| <b>@deprecated.</b> Please use the 'equationType' property instead. Get the equation type of the current node |
| [toLaTeX()](#toLaTeX--)| Convert this equtation to LaTeX expression. |
| [toMathML()](#toMathML--)| Convert this equtation to MathML expression. |
| [addChild(EquationNodeType)](#addChild-equationnodetype-)| Insert a node of the specified type at the end of the child node list of the current node. |
| [addChild(EquationNode)](#addChild-equationnode-)| Inserts the specified node at the end of the current node's list of child nodes. |
| [insertChild(number, EquationNodeType)](#insertChild-number-equationnodetype-)| Inserts a node of the specified type at the specified index position in the current node's child node list. |
| [insertAfter(EquationNodeType)](#insertAfter-equationnodetype-)| Inserts the specified node after the current node. |
| [insertBefore(EquationNodeType)](#insertBefore-equationnodetype-)| Inserts the specified node before the current node. |
| [getChild(number)](#getChild-number-)| Returns the node at the specified index among the children of the current node. |
| [remove()](#remove--)| Removes itself from the parent. |
| [removeChild(EquationNode)](#removeChild-equationnode-)| Removes the specified node from the current node's children. |
| [removeChild(number)](#removeChild-number-)| Removes the node at the specified index from the current node's children. |
| [removeAllChildren()](#removeAllChildren--)| Removes all the child nodes of the current node. |
| static [createNode(EquationNodeType, Workbook, EquationNode)](#createNode-equationnodetype-workbook-equationnode-)| Create a node of the specified type. |
| [equals(Object)](#equals-object-)| Determine whether the current equation node is equal to the specified node |
| [getType()](#getType--)| Represents the type of the node. |


### constructor(EquationNode) {#constructor-equationnode-}

Constructs from a parent object convertible to this.

```javascript
constructor(obj: EquationNode);
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| obj | EquationNode | The parent object. |

### fractionType {#fractionType--}

This specifies the type of fraction ; the default is 'Bar'.

```javascript
fractionType : EquationFractionType;
```


### startIndex {#startIndex--}

Readonly. Gets the start index of the characters.

```javascript
startIndex : number;
```


### length {#length--}

Readonly. Gets the length of the characters.

```javascript
length : number;
```


### font {#font--}

Readonly. Returns the font of this object.

```javascript
font : Font;
```


### textOptions {#textOptions--}

Readonly. Returns the text options.

```javascript
textOptions : TextOptions;
```


### parentNode {#parentNode--}

Specifies the parent node of the current node

```javascript
parentNode : EquationNode;
```


### equationType {#equationType--}

Readonly. Get the equation type of the current node

```javascript
equationType : EquationNodeType;
```


### getFractionType() {#getFractionType--}

<b>@deprecated.</b> Please use the 'fractionType' property instead. This specifies the type of fraction ; the default is 'Bar'.

```javascript
getFractionType() : EquationFractionType;
```


**Returns**

[EquationFractionType](../equationfractiontype/)

### setFractionType(EquationFractionType) {#setFractionType-equationfractiontype-}

<b>@deprecated.</b> Please use the 'fractionType' property instead. This specifies the type of fraction ; the default is 'Bar'.

```javascript
setFractionType(value: EquationFractionType) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| value | [EquationFractionType](../equationfractiontype/) | The value to set. |

### isNull() {#isNull--}

Checks whether the implementation object is null.

```javascript
isNull() : boolean;
```


### getStartIndex() {#getStartIndex--}

<b>@deprecated.</b> Please use the 'startIndex' property instead. Gets the start index of the characters.

```javascript
getStartIndex() : number;
```


### getLength() {#getLength--}

<b>@deprecated.</b> Please use the 'length' property instead. Gets the length of the characters.

```javascript
getLength() : number;
```


### getFont() {#getFont--}

<b>@deprecated.</b> Please use the 'font' property instead. Returns the font of this object.

```javascript
getFont() : Font;
```


**Returns**

[Font](../font/)

### getTextOptions() {#getTextOptions--}

<b>@deprecated.</b> Please use the 'textOptions' property instead. Returns the text options.

```javascript
getTextOptions() : TextOptions;
```


**Returns**

[TextOptions](../textoptions/)

### setWordArtStyle(PresetWordArtStyle) {#setWordArtStyle-presetwordartstyle-}

Sets the preset WordArt style.

```javascript
setWordArtStyle(style: PresetWordArtStyle) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| style | [PresetWordArtStyle](../presetwordartstyle/) | The preset WordArt style. |

**Remarks**

Only for the text of shape/chart.

### getParentNode() {#getParentNode--}

<b>@deprecated.</b> Please use the 'parentNode' property instead. Specifies the parent node of the current node

```javascript
getParentNode() : EquationNode;
```


**Returns**

[EquationNode](../equationnode/)

### setParentNode(EquationNode) {#setParentNode-equationnode-}

<b>@deprecated.</b> Please use the 'parentNode' property instead. Specifies the parent node of the current node

```javascript
setParentNode(value: EquationNode) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| value | [EquationNode](../equationnode/) | The value to set. |

### getEquationType() {#getEquationType--}

<b>@deprecated.</b> Please use the 'equationType' property instead. Get the equation type of the current node

```javascript
getEquationType() : EquationNodeType;
```


**Returns**

[EquationNodeType](../equationnodetype/)

### toLaTeX() {#toLaTeX--}

Convert this equtation to LaTeX expression.

```javascript
toLaTeX() : string;
```


### toMathML() {#toMathML--}

Convert this equtation to MathML expression.

```javascript
toMathML() : string;
```


### addChild(EquationNodeType) {#addChild-equationnodetype-}

Insert a node of the specified type at the end of the child node list of the current node.

```javascript
addChild(equationType: EquationNodeType) : EquationNode;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| equationType | [EquationNodeType](../equationnodetype/) | Types of Equation Nodes |

**Returns**

If the specified type exists, the corresponding node is returned, and if the type does not exist, a node of unknown type is returned.

### addChild(EquationNode) {#addChild-equationnode-}

Inserts the specified node at the end of the current node's list of child nodes.

```javascript
addChild(node: EquationNode) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| node | [EquationNode](../equationnode/) | The specified node |

### insertChild(number, EquationNodeType) {#insertChild-number-equationnodetype-}

Inserts a node of the specified type at the specified index position in the current node's child node list.

```javascript
insertChild(index: number, equationType: EquationNodeType) : EquationNode;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| index | number | index value |
| equationType | [EquationNodeType](../equationnodetype/) | Types of Equation Nodes |

**Returns**

If the specified type exists, the corresponding node is returned, and if the type does not exist, a node of unknown type is returned.

### insertAfter(EquationNodeType) {#insertAfter-equationnodetype-}

Inserts the specified node after the current node.

```javascript
insertAfter(equationType: EquationNodeType) : EquationNode;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| equationType | [EquationNodeType](../equationnodetype/) | Types of Equation Nodes |

**Returns**

If the specified type exists, the corresponding node is returned, and if the type does not exist, a node of unknown type is returned.

### insertBefore(EquationNodeType) {#insertBefore-equationnodetype-}

Inserts the specified node before the current node.

```javascript
insertBefore(equationType: EquationNodeType) : EquationNode;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| equationType | [EquationNodeType](../equationnodetype/) | Types of Equation Nodes |

**Returns**

If the specified type exists, the corresponding node is returned, and if the type does not exist, a node of unknown type is returned.

### getChild(number) {#getChild-number-}

Returns the node at the specified index among the children of the current node.

```javascript
getChild(index: number) : EquationNode;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| index | number | Index of the node |

**Returns**

Returns the corresponding node if the specified node exists, otherwise returns null.

### remove() {#remove--}

Removes itself from the parent.

```javascript
remove() : void;
```


### removeChild(EquationNode) {#removeChild-equationnode-}

Removes the specified node from the current node's children.

```javascript
removeChild(node: EquationNode) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| node | [EquationNode](../equationnode/) | Node to be deleted. |

### removeChild(number) {#removeChild-number-}

Removes the node at the specified index from the current node's children.

```javascript
removeChild(index: number) : void;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| index | number | Index of the node |

### removeAllChildren() {#removeAllChildren--}

Removes all the child nodes of the current node.

```javascript
removeAllChildren() : void;
```


### createNode(EquationNodeType, Workbook, EquationNode) {#createNode-equationnodetype-workbook-equationnode-}

Create a node of the specified type.

```javascript
static createNode(equationType: EquationNodeType, workbook: Workbook, parent: EquationNode) : EquationNode;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| equationType | [EquationNodeType](../equationnodetype/) | Types of Equation Nodes |
| workbook | [Workbook](../workbook/) | The workbook object associated with the equation |
| parent | [EquationNode](../equationnode/) | The parent node where this node is located |

**Returns**

If the specified type exists, the corresponding node is returned, and if the type does not exist, a node of unknown type is returned.

### equals(Object) {#equals-object-}

Determine whether the current equation node is equal to the specified node

```javascript
equals(obj: Object) : boolean;
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| obj | Object | The specified node |

### getType() {#getType--}

Represents the type of the node.

```javascript
getType() : TextNodeType;
```


**Returns**

[TextNodeType](../textnodetype/)