Function preserveAttributeAs

preserveAttributeAs(
    dataAttributeName: string,
    viewAttributeName: string,
    ...dataAttributeAliases: string[],
): AttributeMapper
Preserves the given data attribute as the given view attribute. Thus, it provides a mapper for toView renaming attribute given by dataAttributeName to attribute named viewAttributeName.

If a data attribute has alias names, you may specify them in dataAttributeAliases. Note, that the first existing attributes value in [dataAttributeName, ...dataAttributeAliases] will be taken into account. All other attributes will be lost in this processing.
Parameters
- dataAttributeName: string
  the name of the attribute in data
- viewAttributeName: string
  the name of the attribute in data view
- ...dataAttributeAliases: string[]
  aliases for the attribute in data, which shall be mapped to the same data view attribute
Returns AttributeMapper
Example: **Simple Use Case:** Mapper to store data attribute `xlink:type` in view as `data-xlink-type`:
```
mapper = preserveAttributeAs("xlink:type", "data-xlink-type");
```
Example: **Extended Use Case:** Mapper to store data attribute `lang` with alias `xml:lang` in view as `lang`:
```
mapper = preserveAttributeAs("lang", "lang", "xml:lang");
```
- Defined in Attributes.ts:84