Virtual Keyboard JavaScript Events
Complete video link here:
• How to make Virtual Keyboard | JavaScript ...
below are video details:
Variables and Initial Setup:
keyboardKeys: Selects all the elements with the class .key, representing the keys on the virtual keyboard. This allows interaction with each key.
textarea: References the textarea element in the DOM where the text will be displayed, either through typing or animation.
startButton: Refers to the button element that, when clicked, starts the typing animation.
index: A variable used to track the current position in the string being typed during the animation.
typingAnimationActive: A boolean flag indicating whether the typing animation is currently running. It helps prevent other interactions while the animation is active.
Type Character Function:
This function is responsible for the typing animation. It sequentially types out each character of the given text into the textarea. It checks if there are still characters left to type (by comparing index with the text length). For each character:
The character is appended to the textarea's current value.
The function tries to match the character to a corresponding virtual keyboard key (considering both lowercase and uppercase).
If a match is found, the key is visually highlighted as being "pressed," and then the highlight is removed after a short delay to simulate a real keypress.
Run Typing Animation Function:
This function initiates the typing animation when the "Start" button is clicked. It checks if the animation is not already running by examining typingAnimationActive. If not, it sets this flag to true, clears the textarea, and starts the typing process by calling typeCharacter() with the text from the textarea.
Virtual Keyboard Click Event Handlers:
This part handles user interaction with the virtual keyboard. When a key is clicked:
It checks if the typing animation is not running.
If the key represents a standard character, it appends this character to the textarea.
Special keys like "space" and "enter" are handled specifically to append a space or newline character.
Physical Keyboard Keydown Event Handler:
This event listener responds to physical keypresses. It checks if the typing animation is not running and determines which key was pressed. It then finds the corresponding key in the virtual keyboard:
It visually highlights the key to simulate a press.
Depending on the key, it appends the appropriate character (including special handling for space and enter) to the textarea.
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