#Web audio tuner github typescript code#

Where timeoutId is the ID of the timeout as returned from the setTimeout() method call.įor example, the following code sets up an alert box to appear after 3 seconds when a button is clicked, but the visitor can click the same button before the alert appears and cancel the timeout: The clearTimeout() method lets us do exactly that. Sometimes it’s useful to be able to cancel a timer before it goes off. At the same time, this function also sets up a timed function using setTimeout() that sets the text colour back to black after 2 seconds:ĭocument.getElementById('colourButton').lor = '#FF0000' ĭocument.getElementById('colourButton').lor = '#000000' Ĭlick the button below to see it in action:

In this next example, clicking a button calls a function that changes the button’s text colour to red. More usually, you’d call a function instead. In the above simple example we embedded the entire code for our JavaScript alert box in the setTimeout() call. After the call to setTimeout() the script continues normally, with the timer running in the background. It’s worth pointing out that setTimeout() doesn’t halt the execution of the script during the timeout period it merely schedules the specified expression to be run at the specified time. Try it yourself! Click the button below and wait 5 seconds: When a visitor clicks the button, the setTimeout() method is called, passing in the expression that we want to run after the time delay, and the value of the time delay itself – 5,000 milliseconds or 5 seconds. This is most commonly used with the clearTimeout() method (see below). setTimeout() also returns a numeric timeout ID that can be used to track the timeout. Where expression is the JavaScript code to run after timeout milliseconds have elapsed. tTimeout() allows you to specify that a piece of JavaScript code (called an expression) will be run a specified number of milliseconds from when the setTimeout() method was called. In this tutorial we’ll explain how these two methods work, and give some practical examples. These let you run a piece of JavaScript code at some point in the future. JavaScript features a handy couple of methods of the window object: setTimeout() and setInterval().

Web audio tuner github typescript