crawler/dist/lib/utils.d.ts

Crawler is a ready-to-use web spider that works with proxies, asynchrony, rate limit, configurable request pools, jQuery, and HTTP/2 support.

/**
 * @returns type of param, a lower case string
 */
export declare const getType: (value: unknown) => string;
export declare const isNumber: (value: unknown) => boolean;
export declare const isFunction: (value: unknown) => boolean;
export declare const isBoolean: (value: unknown) => boolean;
/**
 * @param target
 * @param source
 * @returns target with source's properties added if they don't exist in target
 * @description
 * This function is used to set default values for an object.
 * Add properties from source to target if they don't exist in target.
 */
export declare const setDefaults: (target: Record<string, unknown>, source: Record<string, unknown>) => Record<string, unknown>;
export declare const isValidUrl: (url: string) => boolean;
/**
 *
 * @param array
 * @returns a flattened array
 * @description
 * Flattens an array of arrays recursively.
 *
 */
export declare function flattenDeep(array: any[]): any[];
export declare function pick<T extends object, K extends keyof T>(target: T, keys: (keyof T)[]): Pick<T, K>;
/**
 *
 * @param obj
 * @returns a cleaned object
 * @description
 * Removes all undefined and null values from an object, this will be done recursively.
 * But it will not remove empty objects. (i.e. {})
 */
export declare const cleanObject: (obj: Record<string, unknown>) => Record<string, unknown>;
/**
 *
 * @param obj
 * @returns an object with all keys in lowercase
 * @description
 * Converts all keys of an object to lowercase.
 */
export declare const lowerObjectKeys: (obj: Record<string, unknown>) => Record<string, unknown>;
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