StringifiedBooleanConverter

const StringifiedBooleanConverter: ConverterFactory<boolean, [string?, string?]>;

Converts a boolean property to a stringified representation. For example setting boolean WAI-ARIA attributes, which are usually set to true or false as string, can not be used as boolean attributes directly in Lit. To handle this, you can use the StringifiedBooleanConverter provided by this package, which allows you to map a boolean value to its string representation.

See

https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-expanded#values

Param

The string representation for true (default: 'true').

Param

The string representation for false (default: 'false').

Example

class MyDropdown extends LitElement {
  @property({
    type: Boolean,
    reflect: true,
    attribute: 'aria-expanded',
    converter: StringifiedBooleanConverter('true', 'false'),
  })
  active = false;
}