In this blog we will make analog clock in Reactjs from Scratch without using external Libraray

import React, { useState, useEffect } from "react";
import "./styles.css"; // Import CSS file for styles

const App = () => {
  const [hour, setHour] = useState(new Date().getHours() % 12);
  const [minute, setMinute] = useState(new Date().getMinutes());
  const [second, setSecond] = useState(new Date().getSeconds());

  useEffect(() => {
    // Update clock hands every second
    const timer = setInterval(() => {
      setHour(new Date().getHours() % 12);
      setMinute(new Date().getMinutes());
      setSecond(new Date().getSeconds());
    }, 1000);

    return () => {
      // Clean up timer when component is unmounted
      clearInterval(timer);
    };
  }, []);

  // Calculate rotation angles for clock hands
  const hourRotation = ((hour + minute / 60) * 360) / 12;
  const minuteRotation = ((minute + second / 60) * 360) / 60;
  const secondRotation = (second / 60) * 360;

  return (
    <>
      <h1 className="title">Mourya Works</h1>
      <div className="clockContainer">
        {/* {hour}:{minute}:{second} */}

        <div
          className="hour"
          style={{ transform: `rotate(${hourRotation}deg)` }}
        ></div>
        <div
          className="minute"
          style={{ transform: `rotate(${minuteRotation}deg)` }}
        ></div>
        <div
          className="second"
          style={{ transform: `rotate(${secondRotation}deg)` }}
        ></div>
      </div>
    </>
  );
};

export default App;

@import url("https://fonts.googleapis.com/css2?family=Rubik:wght@400;500;700&display=swap");
h1 {
  font-family: "Poppins", sans-serif;
  text-align: center; /* Center aligns the text horizontally */
  display: flex; /* Enables flexbox layout for centering vertically */
  justify-content: center; /* Center aligns the text vertically */
}

.clockContainer {
  position: relative;
  margin: auto;
  height: 40vw;
  /*to make the height and width responsive*/
  width: 40vw;
  border-radius: 50%; /* set border-radius to 50% for a circle */
  border: 3px solid black; /* set border style, width, and color */
  /*setting our background image*/
}

.hour,
.minute,
.second {
  position: absolute;
  background: black;
  border-radius: 10px;
  transform-origin: bottom;
}

.hour {
  width: 1.8%;
  height: 25%;
  top: 25%;
  left: 48.85%;
  opacity: 0.8;
}

.minute {
  width: 1.6%;
  height: 30%;
  top: 19%;
  left: 48.9%;
  opacity: 0.8;
}

.second {
  width: 1%;
  height: 40%;
  top: 9%;
  left: 49.25%;
  opacity: 0.8;
}