| 1 | import * as React from 'react';
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| 2 | /** @private is the value an empty array? */
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| 3 | export declare const isEmptyArray: (value?: any) => boolean;
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| 4 | /** @private is the given object a Function? */
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| 5 | export declare const isFunction: (obj: any) => obj is Function;
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| 6 | /** @private is the given object an Object? */
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| 7 | export declare const isObject: (obj: any) => obj is Object;
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| 8 | /** @private is the given object an integer? */
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| 9 | export declare const isInteger: (obj: any) => boolean;
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| 10 | /** @private is the given object a string? */
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| 11 | export declare const isString: (obj: any) => obj is string;
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| 12 | /** @private is the given object a NaN? */
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| 13 | export declare const isNaN: (obj: any) => boolean;
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| 14 | /** @private Does a React component have exactly 0 children? */
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| 15 | export declare const isEmptyChildren: (children: any) => boolean;
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| 16 | /** @private is the given object/value a promise? */
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| 17 | export declare const isPromise: (value: any) => value is PromiseLike<any>;
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| 18 | /** @private is the given object/value a type of synthetic event? */
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| 19 | export declare const isInputEvent: (value: any) => value is React.SyntheticEvent<any, Event>;
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| 20 | /**
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| 21 | * Same as document.activeElement but wraps in a try-catch block. In IE it is
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| 22 | * not safe to call document.activeElement if there is nothing focused.
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| 23 | *
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| 24 | * The activeElement will be null only if the document or document body is not
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| 25 | * yet defined.
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| 26 | *
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| 27 | * @param {?Document} doc Defaults to current document.
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| 28 | * @return {Element | null}
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| 29 | * @see https://github.com/facebook/fbjs/blob/master/packages/fbjs/src/core/dom/getActiveElement.js
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| 30 | */
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| 31 | export declare function getActiveElement(doc?: Document): Element | null;
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| 32 | /**
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| 33 | * Deeply get a value from an object via its path.
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| 34 | */
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| 35 | export declare function getIn(obj: any, key: string | string[], def?: any, p?: number): any;
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| 36 | /**
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| 37 | * Deeply set a value from in object via it's path. If the value at `path`
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| 38 | * has changed, return a shallow copy of obj with `value` set at `path`.
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| 39 | * If `value` has not changed, return the original `obj`.
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| 40 | *
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| 41 | * Existing objects / arrays along `path` are also shallow copied. Sibling
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| 42 | * objects along path retain the same internal js reference. Since new
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| 43 | * objects / arrays are only created along `path`, we can test if anything
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| 44 | * changed in a nested structure by comparing the object's reference in
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| 45 | * the old and new object, similar to how russian doll cache invalidation
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| 46 | * works.
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| 47 | *
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| 48 | * In earlier versions of this function, which used cloneDeep, there were
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| 49 | * issues whereby settings a nested value would mutate the parent
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| 50 | * instead of creating a new object. `clone` avoids that bug making a
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| 51 | * shallow copy of the objects along the update path
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| 52 | * so no object is mutated in place.
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| 53 | *
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| 54 | * Before changing this function, please read through the following
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| 55 | * discussions.
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| 56 | *
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| 57 | * @see https://github.com/developit/linkstate
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| 58 | * @see https://github.com/jaredpalmer/formik/pull/123
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| 59 | */
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| 60 | export declare function setIn(obj: any, path: string, value: any): any;
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| 61 | /**
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| 62 | * Recursively a set the same value for all keys and arrays nested object, cloning
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| 63 | * @param object
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| 64 | * @param value
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| 65 | * @param visited
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| 66 | * @param response
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| 67 | */
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| 68 | export declare function setNestedObjectValues<T>(object: any, value: any, visited?: any, response?: any): T;
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