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TimeComponent.jsx
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TimeComponent.jsx
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// Copyright 2023 The MediaPipe Authors.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ---------------------------------------------------------------------------------------- //
// Import necessary modules from the React library
import React, { useState, useEffect } from "react";
function TimeComponent() {
// `useState` hook is used to initialize state variables for time, day name, month, and day
const [time, setTime] = useState(getFormattedTime());
const [dayname, setDayName] = useState("");
const [month, setMonth] = useState("");
const [day, setDay] = useState("");
// We use `useEffect` to update the time every second.
useEffect(() => {
const intervalId = setInterval(() => {
const formattedTime = getFormattedTime();
setTime(formattedTime);
}, 1000);
// We use `clearInterval` to clear the interval when the component is unmounted.
return () => clearInterval(intervalId);
}, []);
// We use `useEffect` to initialize the day name, month, and day when the component is mounted.
useEffect(() => {
const today = new Date();
const dayIndex = today.getDay();
const days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
const monthNames = [
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
];
setDayName(days[dayIndex]);
setMonth(monthNames[today.getMonth()]);
setDay(String(today.getDate()).padStart(2, "0"));
}, []);
// This function returns the current time in the format "hh:mm:ss".
function getFormattedTime() {
const currentTime = new Date();
return currentTime.toLocaleTimeString(navigator.language, {
hour: "2-digit",
minute: "2-digit",
second: "2-digit",
});
}
return (
<div className="App">
<h1>
{time} • {dayname}, {month} {day}
</h1>
</div>
);
}
// Export the `TimeComponent` component
export default TimeComponent;