![]() ![]() This results in a live clock display that stays up to date in real time. The issue: in your current implementation, setInterval would be called every time the component renders (i.e., will also be called after the time state is set) and will create a new interval - which produced this 'exponential growth' as seen in your console. This function will check the time left from the target timer by doing calculations and return a total number of hours, minutes, and seconds. getTimeRemaining: This will compute the difference between the target timer and the current time we have. This creates a timer that updates the time state. Approach: We can use the following approach in React JS to use the Countdown timer. The combination of the constructor, update, and componentDidMount methods ensure that the Clock component initializes with the current time and then updates it every second. In this method, a setInterval function is used to call the update method every 1000 milliseconds (1 second). There are 66 other projects in the npm registry using react-time-picker. Start using react-time-picker in your project by running npm i react-time-picker. This creates a timer that updates the time state property every second, effectively making the clock display the live time. Latest version: 6.5.1, last published: 17 days ago. ![]() In this method, a setInterval function is used to call the update method every 1000 milliseconds (1 second). Lines 15–17: The componentDidMount method is a lifecycle hook in React that is called automatically after the component has been rendered to the screen. The purpose of this method is to update the state of the component by setting the time property to the current date and time using the new Date(). ![]() Lines 12–14: The update is a class method. Here, it sets the initial state with a property named time, which holds the current date and time using the new Date(). Lines 6–11: The constructor is a special method that initializes the state of the Clock component. Note: Press 'w' key to see the output in web browser. ![]()
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