![]() Now, let’s add an event listener to this input so that we could listen to the keyup event. Let’s say we have a text input box in our HTML file with some id myInput: So, if the Unicode value of the key pressed lies between 48 to 57(including), it is a number otherwise not. We know that the Unicode value of 0 is 48, Unicode value of 1 is 49, and so on up to 57 which is the Unicode value of 9. Both properties return the Unicode value of the key pressed. Ĭonst element = document.querySelector("textarea"),Įlement.To check if the key pressed is a number or not, you can use event.ke圜ode or event.which property. In this case if we need to observe the output we need to open the console. ![]() Let’s consider the another example to detect the arrow key pressed. For example, if the users click the down arrow key the event triggered and display an alert “down key”. When the script executed, it will make the event that triggers and displays an alert box whenever the user presses the arrow key. ![]() Ĭlick on the output page and then press the arrow key to get event triggered onkeydown JavaScript event handler by passing arrow key unique codes. ![]() In the following example we are running the script with. onkeydown event handler instructs the compiler to execute a specific function() by placing an alert(" message"), we can display an alert box containing a specific message. Let’s look into the article to understand more about detecting arrow key presses in JavaScript. The key codes for the left arrow key, up arrow key, right key, and down arrow key are 37, 38, 39, and 40, respectively. These keys also have a special key code that JavaScript can utilise to determine whether, or not they have been depressed. On our keyboard, we can see, the left, right, up, and download keys. There are four arrow keys on our keyboard. Here, we'll check to see if the arrow key has been pressed. ![]() There is a distinct key code for each key on the keyboard. Before we jump into the article, let’s discuss few things to know some information. In this article we are going to learn about detecting arrow key presses in JavaScript. ![]()
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