/**
 Returns the lowerCamelCase form of a string.

 ```javascript
 camelize('innerHTML');          // 'innerHTML'
 camelize('action_name');        // 'actionName'
 camelize('css-class-name');     // 'cssClassName'
 camelize('my favorite items');  // 'myFavoriteItems'
 camelize('My Favorite Items');  // 'myFavoriteItems'
 ```

 @method camelize
 @param {String} str The string to camelize.
 @return {String} the camelized string.
 */
export declare function camelize(str: string): string;
/**
 Returns the UpperCamelCase form of a string.

 @example
 ```javascript
 'innerHTML'.classify();          // 'InnerHTML'
 'action_name'.classify();        // 'ActionName'
 'css-class-name'.classify();     // 'CssClassName'
 'my favorite items'.classify();  // 'MyFavoriteItems'
 'app.component'.classify();      // 'AppComponent'
 ```
 @method classify
 @param {String} str the string to classify
 @return {String} the classified string
 */
export declare function classify(str: string): string;
/**
 Returns the Capitalized form of a string

 ```javascript
 'innerHTML'.capitalize()         // 'InnerHTML'
 'action_name'.capitalize()       // 'Action_name'
 'css-class-name'.capitalize()    // 'Css-class-name'
 'my favorite items'.capitalize() // 'My favorite items'
 ```

 @method capitalize
 @param {String} str The string to capitalize.
 @return {String} The capitalized string.
 */
export declare function capitalize(str: string): string;