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  • Difference between setTimeout(), setInterval() in Javascript

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    In Javascript we can execute some code at specific time intervals. These are called timing events.

    There are two methods that are used:
    1.setInterval()
    2.setTimeout()

    setInterval() Method : The setInterval() method executes the function at a specified number of milliseconds and it will continue to execute the function again at that specific time interval.

    Syntax:

    window.setInterval("javascript function", milliseconds);
    

    Example:

    <!DOCTYPE html>
    <html>
    <body>
    <button onclick="setInterval(function(){alert('Hii')},3000);">Click here</button>
    </body>
    </html>
    

    In the above example when we click on the button, It will alert the message after every 3 seconds.

    clearInterval() : This method is used to stop the further executions in the setInterval() method.

    Syntax:

    window.clearInterval(intervalVariable)
    

    setTimeout() Method : This method will execute the function after a specified time interval. The first parameter in this is a function to execute and the second parameter is the time in miliseconds.

    Syntax:
    window.setTimeout("javascript function", milliseconds);

    Example:

    <!DOCTYPE html>
    <html>
    <body>
    <button onclick="setTimeout(function(){alert('Hello')},5000);">Click here</button>
    </body>
    </html>
    

    This will show the alert message after 5 seconds on clicking the button.

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