/**
 * Adds a prefix to a string if it doesn't already start with the prefix.
 */
export declare function startWith(value: string, start: string): string;
/**
 * Removes a prefix from a string if it starts with the prefix.
 */
export declare function startWithout(value: string, start: string): string;
/**
 * Adds a suffix to a string if it doesn't already end with the suffix.
 */
export declare function endWith(text: string, end: string): string;
/**
 * Removes a suffix from a string if it ends with the suffix.
 */
export declare function endWithout(text: string, end: string): string;
/**
 * Adds a prefix and suffix to a string if it doesn't already start and end with them.
 */
export declare function surroundWith(text: string, start: string, end: string): string;
/**
 * Adds plurals to a string except for excluded words.
 * @info This handles most english pluralisation rules, but there are exceptions.
 */
export declare function pluralize(word: string, count: number): string;
/**
 * Removes plurals from a string.
 * @info This handles most english pluralisation rules, but there are exceptions.
 */
export declare function singularize(value: string): string;
/**
 * Converts a number to a string with ordinal suffix.
 */
export declare function ordinalize(value: number): string;
/**
 * Strip HTML tags from a string efficiently, compatible with SSR.
 */
export declare function stripHtml(text: string): string;
/**
 * Strips whitespace from a string.
 */
export declare function stripWhitespace(text: string): string;
/**
 * Strips numbers from a string.
 */
export declare function stripNumbers(text: string): string;
/**
 * Strips punctuation from a string.
 */
export declare function stripPunctuation(text: string): string;
/**
 * Strips symbols from a string.
 */
export declare function stripSymbols(text: string): string;
/**
 * Strips emojis from a string (requires ES6 Unicode support) 🦊.
 */
export declare function stripEmojis(text: string): string;
/**
 * Converts a string to-a-slug.
 */
export declare function slugify(text: string): string;
/**
 * Converts a slug to a string.
 */
export declare function deslugify(text: string): string;
/**
 * Removes spaces and capitalizes the first letter of each word except for the first word.
 */
export declare function camelCase(text: string): string;
/**
 * Removes spaces and capitalizes the first letter of each word.
 */
export declare function pascalCase(text: string): string;
/**
 * Replaces spaces with underscores and converts to lowercase.
 */
export declare function snakeCase(text: string): string;
/**
 * Replaces spaces with hyphens and converts to lowercase.
 */
export declare function kebabCase(text: string): string;
/**
 * Converts to title case by capitalizing the first letter of each word.
 */
export declare function titleCase(text: string): string;
/**
 * Escape HTML entities in a string.
 */
export declare function escapeHtml(text: string): string;
/**
 * Unescape HTML entities in a string.
 */
export declare function unescapeHtml(text: string): string;