diff --git a/.eslintrc b/.eslintrc
index c5f388f..b0f9732 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -2,12 +2,20 @@
   "extends": ["eslint-config-airbnb", "plugin:prettier/recommended", "prettier"],
   "env": {
     "browser": true,
-    "node": true
+    "node": true,
+    "jest": true
   },
-  "parser": "@babel/eslint-parser",
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["react", "@typescript-eslint"],
   "rules": {
     "no-restricted-globals": [1, "isFinite"],
-    "valid-jsdoc": 2,
+    "valid-jsdoc": [
+      "error",
+      {
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+        "requireParamType": false
+      }
+    ],
     "react/jsx-uses-react": 2,
     "react/jsx-uses-vars": 2,
     "react/react-in-jsx-scope": 2,
@@ -21,6 +29,5 @@
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     "react/forbid-prop-types": "off",
     "react/jsx-props-no-spreading": "off"
-  },
-  "plugins": ["react"]
+  }
 }
diff --git a/package-lock.json b/package-lock.json
index 8768e11..96782d6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,6 +29,8 @@
         "@babel/runtime": "^7.23.2",
         "@testing-library/jest-dom": "^6.5.0",
         "@testing-library/react": "^16.0.1",
+        "@typescript-eslint/eslint-plugin": "^8.0.1",
+        "@typescript-eslint/parser": "^8.0.1",
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@@ -2482,18 +2484,18 @@
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+      "resolved": "https://registry.npmjs.org/@eslint-community/regexpp/-/regexpp-4.11.0.tgz",
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@@ -2514,9 +2516,9 @@
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@@ -2528,35 +2530,24 @@
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+      "deprecated": "Use @eslint/config-array instead",
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-        "debug": "^4.1.1",
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+      "deprecated": "Use @eslint/object-schema instead",
       "dev": true
     },
     "node_modules/@isaacs/cliui": {
@@ -3511,6 +3503,242 @@
         "@types/node": "*"
       }
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     "import-fresh": {
@@ -17442,6 +17846,12 @@
       "integrity": "sha512-abv/qOcuPfk3URPfDzmZU1LKmuw8kT+0nIHvKrKgFrwifol/doWcdA4ZqsWQ8ENrFKkd67Mfpo/LovbIUsbt3w==",
       "dev": true
     },
+    "merge2": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz",
+      "integrity": "sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==",
+      "dev": true
+    },
     "methods": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
@@ -19236,6 +19646,13 @@
         "punycode": "^2.1.1"
       }
     },
+    "ts-api-utils": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-1.3.0.tgz",
+      "integrity": "sha512-UQMIo7pb8WRomKR1/+MFVLTroIvDVtMX3K6OUir8ynLyzB8Jeriont2bTAtmNPa1ekAgN7YPDyf6V+ygrdU+eQ==",
+      "dev": true,
+      "requires": {}
+    },
     "tsconfig-paths": {
       "version": "3.14.2",
       "resolved": "https://registry.npmjs.org/tsconfig-paths/-/tsconfig-paths-3.14.2.tgz",
@@ -19274,6 +19691,12 @@
         "prelude-ls": "^1.2.1"
       }
     },
+    "type-fest": {
+      "version": "0.20.2",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz",
+      "integrity": "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ==",
+      "dev": true
+    },
     "type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
diff --git a/package.json b/package.json
index 88be07a..ed67584 100644
--- a/package.json
+++ b/package.json
@@ -68,6 +68,8 @@
     "@testing-library/react": "^16.0.1",
     "@vitejs/plugin-react": "^4.3.1",
     "@vitest/coverage-v8": "^2.0.5",
+    "@typescript-eslint/eslint-plugin": "^8.0.1",
+    "@typescript-eslint/parser": "^8.0.1",
     "babel-loader": "^9.1.3",
     "core-js": "^3.33.0",
     "cross-env": "^7.0.3",
diff --git a/src/Animate.jsx b/src/Animate.jsx
index a687698..67e8ff1 100644
--- a/src/Animate.jsx
+++ b/src/Animate.jsx
@@ -4,7 +4,7 @@ import { deepEqual } from 'fast-equals';
 import createAnimateManager from './AnimateManager';
 import { configEasing } from './easing';
 import configUpdate from './configUpdate';
-import { getTransitionVal, identity } from './util';
+import { getTransitionVal } from './util';
 
 class Animate extends PureComponent {
   constructor(props, context) {
@@ -189,7 +189,7 @@ class Animate extends PureComponent {
         transition,
       };
 
-      return [...sequence, newStyle, duration, onAnimationEnd].filter(identity);
+      return [...sequence, newStyle, duration, onAnimationEnd].filter(s => s);
     };
 
     return this.manager.start([
diff --git a/src/util.js b/src/util.js
index bae906b..f26452c 100644
--- a/src/util.js
+++ b/src/util.js
@@ -1,49 +1,26 @@
 /* eslint no-console: 0 */
 
+/**
+ * Finds the intersection of keys between two objects
+ * @param {object} preObj previous object
+ * @param {object} nextObj next object
+ * @returns an array of keys that exist in both objects
+ */
 export const getIntersectionKeys = (preObj, nextObj) =>
   [Object.keys(preObj), Object.keys(nextObj)].reduce((a, b) => a.filter(c => b.includes(c)));
 
-export const identity = param => param;
-
-/*
- * @description: convert camel case to dash case
- * string => string
+/**
+ * converts a camel case string to dash case
+ * @param {string} name string variable
+ * @returns dash case string
  */
 export const getDashCase = name => name.replace(/([A-Z])/g, v => `-${v.toLowerCase()}`);
 
-export const log = (...args) => {
-  console.log(...args);
-};
-
-/*
- * @description: log the value of a varible
- * string => any => any
- */
-export const debug = name => item => {
-  log(name, item);
-
-  return item;
-};
-
-/*
- * @description: log name, args, return value of a function
- * function => function
- */
-export const debugf =
-  (tag, f) =>
-  (...args) => {
-    const res = f(...args);
-    const name = tag || f.name || 'anonymous function';
-    const argNames = `(${args.map(JSON.stringify).join(', ')})`;
-
-    log(`${name}: ${argNames} => ${JSON.stringify(res)}`);
-
-    return res;
-  };
-
-/*
- * @description: map object on every element in this object.
- * (function, object) => object
+/**
+ * Maps an object to another object
+ * @param {function} fn function to map
+ * @param {object} obj object to map
+ * @returns mapped object
  */
 export const mapObject = (fn, obj) =>
   Object.keys(obj).reduce(
@@ -54,13 +31,20 @@ export const mapObject = (fn, obj) =>
     {},
   );
 
+/**
+ * Gets the transition value for a set of properties
+ * @param {array} props array of properties
+ * @param {string} duration duration of transition
+ * @param {string} easing easing of transition
+ * @returns transition value
+ */
 export const getTransitionVal = (props, duration, easing) =>
   props.map(prop => `${getDashCase(prop)} ${duration}ms ${easing}`).join(',');
 
-const isDev = process.env.NODE_ENV !== 'production';
+const isDev = () => process.env.NODE_ENV !== 'production';
 
 export const warn = (condition, format, a, b, c, d, e, f) => {
-  if (isDev && typeof console !== 'undefined' && console.warn) {
+  if (isDev() && typeof console !== 'undefined' && console.warn) {
     if (format === undefined) {
       console.warn('LogUtils requires an error message argument');
     }
diff --git a/test/util.spec.ts b/test/util.spec.ts
new file mode 100644
index 0000000..782f0f0
--- /dev/null
+++ b/test/util.spec.ts
@@ -0,0 +1,156 @@
+import { getIntersectionKeys, getDashCase, mapObject, getTransitionVal, warn } from '../src/util';
+
+describe('getIntersectionKeys', () => {
+  it('should return which keys intersect between two objects', () => {
+    const from = { a: 1, b: 2, c: 3 };
+    const to = { b: 4, c: 5, d: 6 };
+
+    const keys = getIntersectionKeys(from, to);
+
+    expect(keys).toEqual(['b', 'c']);
+  });
+});
+
+describe('getDashCase', () => {
+  it('should convert camel case to dash (kebab) case', () => {
+    const someString = 'someString';
+
+    const dashCase = getDashCase(someString);
+
+    expect(dashCase).toEqual('some-string');
+  });
+
+  it('should convert a complex camel case to dash (kebab) case', () => {
+    const someString = 'someStringTHATHasALotofVariationInIT';
+
+    const dashCase = getDashCase(someString);
+
+    expect(dashCase).toEqual('some-string-t-h-a-t-has-a-lotof-variation-in-i-t');
+  });
+});
+
+describe('mapObject', () => {
+  it('should return a new identical object if the value is returned from the fn', () => {
+    const input = { a: 1, b: 2, c: 3 };
+
+    const res = mapObject((key: string, value: number) => {
+      return value;
+    }, input);
+
+    expect(res).toEqual({
+      a: 1,
+      b: 2,
+      c: 3,
+    });
+  });
+
+  it('should return an object where the keys are the value and the key', () => {
+    const input = { a: 1, b: 2, c: 3 };
+
+    const res = mapObject((key: string, value: number) => {
+      return key;
+    }, input);
+
+    expect(res).toEqual({
+      a: 'a',
+      b: 'b',
+      c: 'c',
+    });
+  });
+});
+
+describe('getTransitionVal', () => {
+  it('should return the correct transition value for a single property', () => {
+    const result = getTransitionVal(['opacity'], '300', 'ease-in');
+    expect(result).toBe('opacity 300ms ease-in');
+  });
+
+  it('should return the correct transition value for multiple properties', () => {
+    const result = getTransitionVal(['opacity', 'transform'], '300', 'ease-in');
+    expect(result).toBe('opacity 300ms ease-in,transform 300ms ease-in');
+  });
+
+  it('should handle an empty array of properties', () => {
+    const result = getTransitionVal([], '300', 'ease-in');
+    expect(result).toBe('');
+  });
+
+  it('should handle different durations and easings', () => {
+    const result = getTransitionVal(['opacity', 'transform'], '500', 'linear');
+    expect(result).toBe('opacity 500ms linear,transform 500ms linear');
+  });
+
+  it('should correctly format property names using dash-case', () => {
+    const result = getTransitionVal(['backgroundColor', 'transform'], '200', 'ease-out');
+    expect(result).toBe('background-color 200ms ease-out,transform 200ms ease-out');
+  });
+});
+
+describe('warn', () => {
+  let originalConsoleWarn;
+
+  beforeEach(() => {
+    // Backup the original console.warn
+    originalConsoleWarn = console.warn;
+    // Mock console.warn
+    console.warn = vi.fn();
+  });
+
+  afterEach(() => {
+    // Restore the original console.warn
+    console.warn = originalConsoleWarn;
+    vi.unstubAllEnvs();
+  });
+
+  it('should not log anything if in production environment', () => {
+    // Set environment to production
+    vi.stubEnv('NODE_ENV', 'production');
+    warn(false, 'This should not be logged');
+    expect(console.warn).not.toHaveBeenCalled();
+  });
+
+  it('should log an error message when format is undefined', () => {
+    // Set environment to development
+    process.env.NODE_ENV = 'development';
+    warn(false);
+    expect(console.warn).toHaveBeenCalledWith(
+      `Minified exception occurred; use the non-minified dev environment for the full error message and additional helpful warnings.`,
+    );
+  });
+
+  it('should not log anything if the condition is true', () => {
+    // Set environment to development
+    process.env.NODE_ENV = 'development';
+    warn(true, 'This should not be logged');
+    expect(console.warn).not.toHaveBeenCalled();
+  });
+
+  it('should log the default error message when condition is false and format is undefined', () => {
+    // Set environment to development
+    process.env.NODE_ENV = 'development';
+    warn(false);
+    expect(console.warn).toHaveBeenCalledWith(`LogUtils requires an error message argument`);
+    expect(console.warn).toHaveBeenCalledWith(
+      `Minified exception occurred; use the non-minified dev environment for the full error message and additional helpful warnings.`,
+    );
+  });
+
+  it('should log formatted message when condition is false and format is defined', () => {
+    // Set environment to development
+    process.env.NODE_ENV = 'development';
+    const format = 'Error: %s %s';
+    const arg1 = 'arg1';
+    const arg2 = 'arg2';
+    warn(false, format, arg1, arg2);
+    expect(console.warn).toHaveBeenCalledWith('Error: arg1 arg2');
+  });
+
+  it('should handle multiple arguments correctly', () => {
+    // Set environment to development
+    process.env.NODE_ENV = 'development';
+    const format = 'Error: %s %s %s %s %s %s';
+    const args = ['arg1', 'arg2', 'arg3', 'arg4', 'arg5', 'arg6'];
+    warn(false, format, ...args);
+    expect(console.warn).toHaveBeenCalledWith('Error: arg1 arg2 arg3 arg4 arg5 arg6');
+  });
+});