export declare type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
export declare const ONE_SECOND = 1000;
export declare const ONE_MINUTE: number;
export declare const ONE_HOUR: number;
export declare const ONE_KILO_BYTE = 1024;
export declare enum DOM_EVENT {
    BEFORE_UNLOAD = "beforeunload",
    CLICK = "click",
    KEY_DOWN = "keydown",
    LOAD = "load",
    POP_STATE = "popstate",
    SCROLL = "scroll",
    TOUCH_START = "touchstart",
    VISIBILITY_CHANGE = "visibilitychange",
    DOM_CONTENT_LOADED = "DOMContentLoaded"
}
export declare enum ResourceKind {
    DOCUMENT = "document",
    XHR = "xhr",
    BEACON = "beacon",
    FETCH = "fetch",
    CSS = "css",
    JS = "js",
    IMAGE = "image",
    FONT = "font",
    MEDIA = "media",
    OTHER = "other"
}
export declare enum RequestType {
    FETCH = "fetch",
    XHR = "xhr"
}
export declare function throttle(fn: () => void, wait: number, options?: {
    leading?: boolean;
    trailing?: boolean;
}): {
    throttled: () => void;
    cancel: () => void;
};
/**
 * Performs a deep merge of objects and arrays
 * - arrays values are merged index by index
 * - objects are merged by keys
 * - values get replaced, unless undefined
 *
 * ⚠️ this method does not prevent infinite loops while merging circular references ⚠️
 *
 */
export declare function deepMerge(destination: ContextValue, ...toMerge: ContextValue[]): ContextValue;
export declare function combine<A, B, C>(a: A, b: B, c: C): A & B & C;
export declare function combine<A, B, C, D>(a: A, b: B, c: C, d: D): A & B & C & D;
interface Assignable {
    [key: string]: any;
}
export declare function assign(target: Assignable, ...toAssign: Assignable[]): void;
/**
 * UUID v4
 * from https://gist.github.com/jed/982883
 */
export declare function generateUUID(placeholder?: string): string;
/**
 * Return true if the draw is successful
 * @param threshold between 0 and 100
 */
export declare function performDraw(threshold: number): boolean;
export declare function round(num: number, decimals: 0 | 1 | 2 | 3): number;
export declare function msToNs<T>(duration: number | T): number | T;
export interface Context {
    [x: string]: ContextValue;
}
export declare type ContextValue = string | number | boolean | Context | ContextArray | undefined;
export interface ContextArray extends Array<ContextValue> {
}
export declare function withSnakeCaseKeys(candidate: Context): Context;
export declare function deepSnakeCase(candidate: ContextValue): ContextValue;
export declare function toSnakeCase(word: string): string;
export declare function noop(): void;
/**
 * Custom implementation of JSON.stringify that ignores value.toJSON.
 * We need to do that because some sites badly override toJSON on certain objects.
 * Note this still supposes that JSON.stringify is correct...
 */
export declare function jsonStringify(value: unknown, replacer?: Array<string | number>, space?: string | number): string | undefined;
export declare function includes(candidate: string, search: string): boolean;
export declare function includes<T>(candidate: T[], search: T): boolean;
export declare function find<T>(array: T[], predicate: (item: T, index: number, array: T[]) => unknown): T | undefined;
export declare function isPercentage(value: unknown): boolean;
export declare function isNumber(value: unknown): value is number;
/**
 * Get the time since the navigation was started.
 *
 * Note: this does not use `performance.timeOrigin` because it doesn't seem to reflect the actual
 * time on which the navigation has started: it may be much farther in the past, at least in Firefox 71.
 * Related issue in Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1429926
 */
export declare function getRelativeTime(timestamp: number): number;
export declare function getTimestamp(relativeTime: number): number;
export declare function getNavigationStart(): number;
export declare function objectValues(object: {
    [key: string]: unknown;
}): unknown[];
export declare function objectEntries(object: {
    [key: string]: unknown;
}): unknown[][];
export declare function isEmptyObject(object: object): boolean;
/**
 * inspired by https://mathiasbynens.be/notes/globalthis
 */
export declare function getGlobalObject<T>(): T;
export declare function getLocationOrigin(): string;
/**
 * IE fallback
 * https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/origin
 */
export declare function getLinkElementOrigin(element: Location | HTMLAnchorElement | URL): string;
export declare function findCommaSeparatedValue(rawString: string, name: string): string | undefined;
export {};