Lodash - Battle-tested utility functions with tree-shakable imports for React apps

Q: Why should I use lodash-es instead of lodash?

lodash-es provides ES module exports that bundlers can tree-shake import { debounce } from "lodash" bundles the entire library (~70KB) import { debounce } from "lodash-es" includes only debounce and its dependencies Always install @types/lodash-es alongside for TypeScript support

Q: How do I correctly use debounce in a React component?

Wrap in useMemo for a stable reference. Clean up with .cancel() on unmount.

Q: What is the difference between debounce and throttle?

debounce waits until N ms of inactivity before executing (good for search inputs) throttle executes at most once per N ms interval (good for scroll/resize handlers) Both return functions with .cancel() and .flush() methods

Q: Gotcha: Why does merge(target, source) modify my original object?

merge mutates the first argument (the target) Always pass an empty object as the first argument: merge({}, defaults, overrides) This creates a new object and leaves defaults and overrides unchanged

Q: When should I use cloneDeep vs structuredClone?

structuredClone() is native and handles most types (objects, arrays, Maps, Sets, Dates) cloneDeep also handles functions, RegExp with flags, and lodash-specific wrappers Prefer structuredClone() for simple cases -- no dependency needed Use cloneDeep when cloning objects that contain functions or class instances

Q: Is _.get(obj, "a.b.c") still useful now that we have optional chaining?

For static paths, prefer obj?.a?.b?.c -- it is native and type-safe get is still useful when the path is a dynamic variable: get(obj, dynamicPath, defaultValue) get also supports array notation in paths: get(obj, "items[0].name")

Q: How do I type a debounced function in TypeScript?

DebouncedFunc adds .cancel() and .flush() to the wrapped function type.

Q: How does groupBy work and what type does it return in TypeScript?

Returns Dictionary where keys are strings.

Q: How do I safely remove keys from an object without mutation?

omit returns a new object; the original is not modified.

Recipe

# Tree-shakable ES module version (recommended)
npm install lodash-es
npm install -D @types/lodash-es
 
# Or classic version with cherry-picked imports
npm install lodash
npm install -D @types/lodash

// Import individual functions for tree-shaking
import debounce from "lodash-es/debounce";
import groupBy from "lodash-es/groupBy";
import cloneDeep from "lodash-es/cloneDeep";
 
// Or named imports (works with lodash-es)
import { debounce, groupBy, cloneDeep } from "lodash-es";

When to reach for this: You need reliable utility functions for debouncing, throttling, deep cloning, grouping, or merging that handle edge cases better than quick hand-rolled solutions.

Working Example

// app/components/SearchWithDebounce.tsx
"use client";
import { useState, useCallback, useMemo, useEffect } from "react";
import debounce from "lodash-es/debounce";
import groupBy from "lodash-es/groupBy";
 
interface Product {
  id: number;
  name: string;
  category: string;
  price: number;
}
 
const ALL_PRODUCTS: Product[] = [
  { id: 1, name: "React Handbook", category: "books", price: 29 },
  { id: 2, name: "TypeScript Guide", category: "books", price: 35 },
  { id: 3, name: "Mechanical Keyboard", category: "electronics", price: 150 },
  { id: 4, name: "USB-C Hub", category: "electronics", price: 45 },
  { id: 5, name: "Standing Desk", category: "furniture", price: 400 },
  { id: 6, name: "Monitor Arm", category: "furniture", price: 80 },
];
 
export default function SearchWithDebounce() {
  const [query, setQuery] = useState("");
  const [results, setResults] = useState<Product[]>(ALL_PRODUCTS);
 
  const searchProducts = useMemo(
    () =>
      debounce((searchQuery: string) => {
        const filtered = ALL_PRODUCTS.filter((p) =>
          p.name.toLowerCase().includes(searchQuery.toLowerCase())
        );
        setResults(filtered);
      }, 300),
    []
  );
 
  // Cleanup debounce on unmount
  useEffect(() => {
    return () => {
      searchProducts.cancel();
    };
  }, [searchProducts]);
 
  const handleChange = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      setQuery(e.target.value);
      searchProducts(e.target.value);
    },
    [searchProducts]
  );
 
  const grouped = groupBy(results, "category");
 
  return (
    <div className="max-w-lg mx-auto p-6">
      <input
        value={query}
        onChange={handleChange}
        placeholder="Search products..."
        className="w-full border rounded px-3 py-2 mb-4"
      />
      {Object.entries(grouped).map(([category, items]) => (
        <div key={category} className="mb-4">
          <h3 className="font-bold capitalize text-lg">{category}</h3>
          <ul className="mt-1 space-y-1">
            {items.map((item) => (
              <li key={item.id} className="flex justify-between">
                <span>{item.name}</span>
                <span className="text-gray-500">${item.price}</span>
              </li>
            ))}
          </ul>
        </div>
      ))}
      <p className="text-sm text-gray-400 mt-4">
        {results.length} results found
      </p>
    </div>
  );
}

What this demonstrates:

Debounced search input preventing excessive filtering on every keystroke
groupBy to organize results by category
Proper cleanup of debounced function on component unmount
useMemo to create a stable debounced function reference

Deep Dive

How It Works

lodash-es provides ES module exports, enabling bundlers (webpack, Rollup, esbuild) to tree-shake unused functions
debounce delays function execution until a specified wait time has elapsed since the last call; cancel() prevents pending invocations
throttle limits execution to at most once per interval, useful for scroll/resize handlers
groupBy creates an object where keys come from the iteratee and values are arrays of matching elements
cloneDeep recursively copies objects, including nested objects, arrays, Maps, Sets, and Date instances
merge deep-merges objects, while Object.assign and spread only do shallow merging

Variations

Throttle for scroll/resize handlers:

"use client";
import { useEffect, useState } from "react";
import throttle from "lodash-es/throttle";
 
export function useScrollPosition() {
  const [scrollY, setScrollY] = useState(0);
 
  useEffect(() => {
    const handleScroll = throttle(() => {
      setScrollY(window.scrollY);
    }, 100);
 
    window.addEventListener("scroll", handleScroll);
    return () => {
      handleScroll.cancel();
      window.removeEventListener("scroll", handleScroll);
    };
  }, []);
 
  return scrollY;
}

Deep merge configuration objects:

import merge from "lodash-es/merge";
 
const defaultConfig = {
  theme: { colors: { primary: "#3b82f6", secondary: "#64748b" } },
  features: { darkMode: false, notifications: true },
};
 
const userConfig = {
  theme: { colors: { primary: "#ef4444" } },
  features: { darkMode: true },
};
 
const config = merge({}, defaultConfig, userConfig);
// { theme: { colors: { primary: "#ef4444", secondary: "#64748b" } },
//   features: { darkMode: true, notifications: true } }

Safe deep cloning:

import cloneDeep from "lodash-es/cloneDeep";
 
const original = {
  nested: { value: 42, date: new Date(), set: new Set([1, 2, 3]) },
};
 
const copy = cloneDeep(original);
copy.nested.value = 100;
console.log(original.nested.value); // 42 (unchanged)

Other common utilities:

import pick from "lodash-es/pick";
import omit from "lodash-es/omit";
import uniqBy from "lodash-es/uniqBy";
import chunk from "lodash-es/chunk";
import get from "lodash-es/get";
 
// Pick specific keys from an object
const user = { id: 1, name: "Alice", email: "alice@example.com", password: "secret" };
const safe = pick(user, ["id", "name", "email"]);
 
// Remove keys
const noPassword = omit(user, ["password"]);
 
// Deduplicate by a property
const unique = uniqBy(users, "email");
 
// Split array into pages
const pages = chunk(items, 10); // [[...10], [...10], ...]
 
// Safe deep property access (consider optional chaining instead)
const value = get(config, "deeply.nested.value", "default");

TypeScript Notes

@types/lodash-es provides full type definitions for all functions
debounce and throttle return DebouncedFunc<T> with cancel() and flush() methods
groupBy returns Dictionary<T[]> where keys are strings
Most functions preserve input types; generics are inferred automatically

import type { DebouncedFunc } from "lodash-es";
 
// Explicitly typed debounced function
const debouncedSearch: DebouncedFunc<(query: string) => void> = debounce(
  (query: string) => {
    console.log("Searching:", query);
  },
  300
);

Gotchas

Importing all of lodash - import _ from "lodash" bundles the entire library (around 70KB minified). Fix: Use lodash-es with named imports or import specific paths like lodash-es/debounce.
Debounce in render - Creating a debounced function inside render creates a new instance every render, defeating the purpose. Fix: Wrap with useMemo or useCallback and provide a stable reference.
Memory leaks from debounce/throttle - Pending debounced calls can fire after component unmount. Fix: Call .cancel() in the cleanup function of useEffect.
cloneDeep is expensive - Deep cloning large objects is slow. Fix: Use structuredClone() (native, available in all modern browsers and Node 17+) for simple cases. Use cloneDeep only when you need to handle functions or special Lodash features.
get vs optional chaining - _.get(obj, "a.b.c") is redundant now that JavaScript has obj?.a?.b?.c. Fix: Prefer optional chaining for property access. Use get only when the path is dynamic (a variable).
merge mutates the target - merge(target, source) mutates target. Fix: Pass an empty object as the first argument: merge({}, defaults, overrides).

Alternatives

Function	Native Alternative	When to Use Lodash
`cloneDeep`	`structuredClone()`	When cloning functions or class instances
`get`	Optional chaining (`?.`)	When path is a dynamic string variable
`debounce`	No native equivalent	Always (or use a small `use-debounce` package)
`throttle`	No native equivalent	Always
`groupBy`	`Object.groupBy()` (ES2024)	When targeting older environments
`merge`	Spread `{...a, ...b}`	When you need deep merge (spread is shallow)
`uniqBy`	`[...new Map(arr.map(x => [x.key, x])).values()]`	When readability matters
`chunk`	No native equivalent	Always

FAQs

Why should I use `lodash-es` instead of `lodash`?

lodash-es provides ES module exports that bundlers can tree-shake
import { debounce } from "lodash" bundles the entire library (~70KB)
import { debounce } from "lodash-es" includes only debounce and its dependencies
Always install @types/lodash-es alongside for TypeScript support

How do I correctly use `debounce` in a React component?

const searchFn = useMemo(
  () => debounce((query: string) => {
    // perform search
  }, 300),
  []
);
 
useEffect(() => {
  return () => searchFn.cancel();
}, [searchFn]);

Wrap in useMemo for a stable reference. Clean up with .cancel() on unmount.

Gotcha: Why does my debounced function fire on every keystroke?

Creating the debounced function inside the render body creates a new instance each render
Each new instance has its own timer, so the delay never accumulates
Fix: wrap with useMemo or useCallback so the same debounced function persists across renders

What is the difference between `debounce` and `throttle`?

debounce waits until N ms of inactivity before executing (good for search inputs)
throttle executes at most once per N ms interval (good for scroll/resize handlers)
Both return functions with .cancel() and .flush() methods

Gotcha: Why does `merge(target, source)` modify my original object?

merge mutates the first argument (the target)
Always pass an empty object as the first argument: merge({}, defaults, overrides)
This creates a new object and leaves defaults and overrides unchanged

When should I use `cloneDeep` vs `structuredClone`?

structuredClone() is native and handles most types (objects, arrays, Maps, Sets, Dates)
cloneDeep also handles functions, RegExp with flags, and lodash-specific wrappers
Prefer structuredClone() for simple cases -- no dependency needed
Use cloneDeep when cloning objects that contain functions or class instances

Is `_.get(obj, "a.b.c")` still useful now that we have optional chaining?

For static paths, prefer obj?.a?.b?.c -- it is native and type-safe
get is still useful when the path is a dynamic variable: get(obj, dynamicPath, defaultValue)
get also supports array notation in paths: get(obj, "items[0].name")

How do I type a debounced function in TypeScript?

import type { DebouncedFunc } from "lodash-es";
 
const debouncedSearch: DebouncedFunc<(q: string) => void> =
  debounce((q: string) => {
    console.log("Searching:", q);
  }, 300);

DebouncedFunc<T> adds .cancel() and .flush() to the wrapped function type.

How does `groupBy` work and what type does it return in TypeScript?

import groupBy from "lodash-es/groupBy";
 
const products = [
  { name: "Book", category: "media" },
  { name: "CD", category: "media" },
  { name: "Desk", category: "furniture" },
];
 
const grouped = groupBy(products, "category");
// { media: [...], furniture: [...] }

Returns Dictionary<T[]> where keys are strings.

How do I safely remove keys from an object without mutation?

import omit from "lodash-es/omit";
 
const user = { id: 1, name: "Alice", password: "secret" };
const safe = omit(user, ["password"]);
// { id: 1, name: "Alice" }

omit returns a new object; the original is not modified.

How do I split an array into fixed-size chunks?

import chunk from "lodash-es/chunk";
 
const items = [1, 2, 3, 4, 5, 6, 7];
const pages = chunk(items, 3);
// [[1, 2, 3], [4, 5, 6], [7]]

Useful for pagination or batching API requests.

How do I prevent memory leaks from debounced/throttled functions in React?

Pending debounced calls fire after the component unmounts if not cancelled
Call .cancel() in the useEffect cleanup function
This prevents state updates on unmounted components
Applies to both debounce and throttle

React Hooks - Using debounce/throttle in custom hooks
React Patterns - Performance patterns with utility functions
TanStack Query - Built-in deduplication reduces need for debounce in data fetching

Recipe

# Tree-shakable ES module version (recommended)
npm install lodash-es
npm install -D @types/lodash-es
 
# Or classic version with cherry-picked imports
npm install lodash
npm install -D @types/lodash

// Import individual functions for tree-shaking
import debounce from "lodash-es/debounce";
import groupBy from "lodash-es/groupBy";
import cloneDeep from "lodash-es/cloneDeep";
 
// Or named imports (works with lodash-es)
import { debounce, groupBy, cloneDeep } from "lodash-es";

When to reach for this: You need reliable utility functions for debouncing, throttling, deep cloning, grouping, or merging that handle edge cases better than quick hand-rolled solutions.

Working Example

// app/components/SearchWithDebounce.tsx
"use client";
import { useState, useCallback, useMemo, useEffect } from "react";
import debounce from "lodash-es/debounce";
import groupBy from "lodash-es/groupBy";
 
interface Product {
  id: number;
  name: string;
  category: string;
  price: number;
}
 
const ALL_PRODUCTS: Product[] = [
  { id: 1, name: "React Handbook", category: "books", price: 29 },
  { id: 2, name: "TypeScript Guide", category: "books", price: 35 },
  { id: 3, name: "Mechanical Keyboard", category: "electronics", price: 150 },
  { id: 4, name: "USB-C Hub", category: "electronics", price: 45 },
  { id: 5, name: "Standing Desk", category: "furniture", price: 400 },
  { id: 6, name: "Monitor Arm", category: "furniture", price: 80 },
];
 
export default function SearchWithDebounce() {
  const [query, setQuery] = useState("");
  const [results, setResults] = useState<Product[]>(ALL_PRODUCTS);
 
  const searchProducts = useMemo(
    () =>
      debounce((searchQuery: string) => {
        const filtered = ALL_PRODUCTS.filter((p) =>
          p.name.toLowerCase().includes(searchQuery.toLowerCase())
        );
        setResults(filtered);
      }, 300),
    []
  );
 
  // Cleanup debounce on unmount
  useEffect(() => {
    return () => {
      searchProducts.cancel();
    };
  }, [searchProducts]);
 
  const handleChange = useCallback(
    (e: React.ChangeEvent<HTMLInputElement>) => {
      setQuery(e.target.value);
      searchProducts(e.target.value);
    },
    [searchProducts]
  );
 
  const grouped = groupBy(results, "category");
 
  return (
    <div className="max-w-lg mx-auto p-6">
      <input
        value={query}
        onChange={handleChange}
        placeholder="Search products..."
        className="w-full border rounded px-3 py-2 mb-4"
      />
      {Object.entries(grouped).map(([category, items]) => (
        <div key={category} className="mb-4">
          <h3 className="font-bold capitalize text-lg">{category}</h3>
          <ul className="mt-1 space-y-1">
            {items.map((item) => (
              <li key={item.id} className="flex justify-between">
                <span>{item.name}</span>
                <span className="text-gray-500">${item.price}</span>
              </li>
            ))}
          </ul>
        </div>
      ))}
      <p className="text-sm text-gray-400 mt-4">
        {results.length} results found
      </p>
    </div>
  );
}

What this demonstrates:

Debounced search input preventing excessive filtering on every keystroke
groupBy to organize results by category
Proper cleanup of debounced function on component unmount
useMemo to create a stable debounced function reference

Deep Dive

How It Works

lodash-es provides ES module exports, enabling bundlers (webpack, Rollup, esbuild) to tree-shake unused functions
debounce delays function execution until a specified wait time has elapsed since the last call; cancel() prevents pending invocations
throttle limits execution to at most once per interval, useful for scroll/resize handlers
groupBy creates an object where keys come from the iteratee and values are arrays of matching elements
cloneDeep recursively copies objects, including nested objects, arrays, Maps, Sets, and Date instances
merge deep-merges objects, while Object.assign and spread only do shallow merging

Variations

Throttle for scroll/resize handlers:

"use client";
import { useEffect, useState } from "react";
import throttle from "lodash-es/throttle";
 
export function useScrollPosition() {
  const [scrollY, setScrollY] = useState(0);
 
  useEffect(() => {
    const handleScroll = throttle(() => {
      setScrollY(window.scrollY);
    }, 100);
 
    window.addEventListener("scroll", handleScroll);
    return () => {
      handleScroll.cancel();
      window.removeEventListener("scroll", handleScroll);
    };
  }, []);
 
  return scrollY;
}

Deep merge configuration objects:

import merge from "lodash-es/merge";
 
const defaultConfig = {
  theme: { colors: { primary: "#3b82f6", secondary: "#64748b" } },
  features: { darkMode: false, notifications: true },
};
 
const userConfig = {
  theme: { colors: { primary: "#ef4444" } },
  features: { darkMode: true },
};
 
const config = merge({}, defaultConfig, userConfig);
// { theme: { colors: { primary: "#ef4444", secondary: "#64748b" } },
//   features: { darkMode: true, notifications: true } }

Safe deep cloning:

import cloneDeep from "lodash-es/cloneDeep";
 
const original = {
  nested: { value: 42, date: new Date(), set: new Set([1, 2, 3]) },
};
 
const copy = cloneDeep(original);
copy.nested.value = 100;
console.log(original.nested.value); // 42 (unchanged)

Other common utilities:

import pick from "lodash-es/pick";
import omit from "lodash-es/omit";
import uniqBy from "lodash-es/uniqBy";
import chunk from "lodash-es/chunk";
import get from "lodash-es/get";
 
// Pick specific keys from an object
const user = { id: 1, name: "Alice", email: "alice@example.com", password: "secret" };
const safe = pick(user, ["id", "name", "email"]);
 
// Remove keys
const noPassword = omit(user, ["password"]);
 
// Deduplicate by a property
const unique = uniqBy(users, "email");
 
// Split array into pages
const pages = chunk(items, 10); // [[...10], [...10], ...]
 
// Safe deep property access (consider optional chaining instead)
const value = get(config, "deeply.nested.value", "default");

TypeScript Notes

@types/lodash-es provides full type definitions for all functions
debounce and throttle return DebouncedFunc<T> with cancel() and flush() methods
groupBy returns Dictionary<T[]> where keys are strings
Most functions preserve input types; generics are inferred automatically

import type { DebouncedFunc } from "lodash-es";
 
// Explicitly typed debounced function
const debouncedSearch: DebouncedFunc<(query: string) => void> = debounce(
  (query: string) => {
    console.log("Searching:", query);
  },
  300
);

Gotchas

Importing all of lodash - import _ from "lodash" bundles the entire library (around 70KB minified). Fix: Use lodash-es with named imports or import specific paths like lodash-es/debounce.
Debounce in render - Creating a debounced function inside render creates a new instance every render, defeating the purpose. Fix: Wrap with useMemo or useCallback and provide a stable reference.
Memory leaks from debounce/throttle - Pending debounced calls can fire after component unmount. Fix: Call .cancel() in the cleanup function of useEffect.
cloneDeep is expensive - Deep cloning large objects is slow. Fix: Use structuredClone() (native, available in all modern browsers and Node 17+) for simple cases. Use cloneDeep only when you need to handle functions or special Lodash features.
get vs optional chaining - _.get(obj, "a.b.c") is redundant now that JavaScript has obj?.a?.b?.c. Fix: Prefer optional chaining for property access. Use get only when the path is dynamic (a variable).
merge mutates the target - merge(target, source) mutates target. Fix: Pass an empty object as the first argument: merge({}, defaults, overrides).

Alternatives

Function	Native Alternative	When to Use Lodash
`cloneDeep`	`structuredClone()`	When cloning functions or class instances
`get`	Optional chaining (`?.`)	When path is a dynamic string variable
`debounce`	No native equivalent	Always (or use a small `use-debounce` package)
`throttle`	No native equivalent	Always
`groupBy`	`Object.groupBy()` (ES2024)	When targeting older environments
`merge`	Spread `{...a, ...b}`	When you need deep merge (spread is shallow)
`uniqBy`	`[...new Map(arr.map(x => [x.key, x])).values()]`	When readability matters
`chunk`	No native equivalent	Always

FAQs

Why should I use `lodash-es` instead of `lodash`?

lodash-es provides ES module exports that bundlers can tree-shake
import { debounce } from "lodash" bundles the entire library (~70KB)
import { debounce } from "lodash-es" includes only debounce and its dependencies
Always install @types/lodash-es alongside for TypeScript support

How do I correctly use `debounce` in a React component?

const searchFn = useMemo(
  () => debounce((query: string) => {
    // perform search
  }, 300),
  []
);
 
useEffect(() => {
  return () => searchFn.cancel();
}, [searchFn]);

Wrap in useMemo for a stable reference. Clean up with .cancel() on unmount.

Gotcha: Why does my debounced function fire on every keystroke?

Creating the debounced function inside the render body creates a new instance each render
Each new instance has its own timer, so the delay never accumulates
Fix: wrap with useMemo or useCallback so the same debounced function persists across renders

What is the difference between `debounce` and `throttle`?

debounce waits until N ms of inactivity before executing (good for search inputs)
throttle executes at most once per N ms interval (good for scroll/resize handlers)
Both return functions with .cancel() and .flush() methods

Gotcha: Why does `merge(target, source)` modify my original object?

merge mutates the first argument (the target)
Always pass an empty object as the first argument: merge({}, defaults, overrides)
This creates a new object and leaves defaults and overrides unchanged

When should I use `cloneDeep` vs `structuredClone`?

structuredClone() is native and handles most types (objects, arrays, Maps, Sets, Dates)
cloneDeep also handles functions, RegExp with flags, and lodash-specific wrappers
Prefer structuredClone() for simple cases -- no dependency needed
Use cloneDeep when cloning objects that contain functions or class instances

Is `_.get(obj, "a.b.c")` still useful now that we have optional chaining?

For static paths, prefer obj?.a?.b?.c -- it is native and type-safe
get is still useful when the path is a dynamic variable: get(obj, dynamicPath, defaultValue)
get also supports array notation in paths: get(obj, "items[0].name")

How do I type a debounced function in TypeScript?

import type { DebouncedFunc } from "lodash-es";
 
const debouncedSearch: DebouncedFunc<(q: string) => void> =
  debounce((q: string) => {
    console.log("Searching:", q);
  }, 300);

DebouncedFunc<T> adds .cancel() and .flush() to the wrapped function type.

How does `groupBy` work and what type does it return in TypeScript?

import groupBy from "lodash-es/groupBy";
 
const products = [
  { name: "Book", category: "media" },
  { name: "CD", category: "media" },
  { name: "Desk", category: "furniture" },
];
 
const grouped = groupBy(products, "category");
// { media: [...], furniture: [...] }

Returns Dictionary<T[]> where keys are strings.

How do I safely remove keys from an object without mutation?

import omit from "lodash-es/omit";
 
const user = { id: 1, name: "Alice", password: "secret" };
const safe = omit(user, ["password"]);
// { id: 1, name: "Alice" }

omit returns a new object; the original is not modified.

How do I split an array into fixed-size chunks?

import chunk from "lodash-es/chunk";
 
const items = [1, 2, 3, 4, 5, 6, 7];
const pages = chunk(items, 3);
// [[1, 2, 3], [4, 5, 6], [7]]

Useful for pagination or batching API requests.

How do I prevent memory leaks from debounced/throttled functions in React?

Pending debounced calls fire after the component unmounts if not cancelled
Call .cancel() in the useEffect cleanup function
This prevents state updates on unmounted components
Applies to both debounce and throttle

React Hooks - Using debounce/throttle in custom hooks
React Patterns - Performance patterns with utility functions
TanStack Query - Built-in deduplication reduces need for debounce in data fetching

Lodash - Battle-tested utility functions with tree-shakable imports for React apps

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Lodash - Battle-tested utility functions with tree-shakable imports for React apps