Function boolFromValue

apps/rxjs.dev/src/app/shared/attribute-utils.ts:42–44

(attrValue: string | undefined, def: boolean = false)

 * @param def Default boolean value when attribute is undefined.
 */
export function boolFromValue(attrValue: string | undefined, def: boolean = false) {
  return attrValue === undefined ? def : attrValue.trim() !== 'false';
}

/**
 * Return the boolean state of attribute from an element