The key variable in p5.js always contains the value of the key which is recently pressed. To get the proper capitalisation, it is best to use it within keyTyped(). Use the keyCode variable For non-ASCII keys.
Syntax:
key
Below program illustrates the key variable in p5.js:
Example-1:
let valueX; let valueY; function setup() {
// Create Canvas of size 500*500
createCanvas(1000, 500);
} function draw() {
// set background color
background(200);
fill( 'green' );
// set text and text size
textSize(25);
text(
'Press Any Key to change the text within circle'
, 30, 30);
// use of keyIsPressed Variable
if (keyIsPressed) {
// draw ellipse
ellipse(mouseX, mouseY, 115, 115);
fill( 'red' );
text( "Key Is Pressed" , 100, 300);
textSize(100);
text(key, mouseX, mouseY);
}
else {
rect(mouseX / 2, mouseY / 2, 300, 200);
text(key, mouseX, mouseY);
}
} |
Output:
Example-2:
let valueX; let valueY; function setup() {
// Create Canvas of size 500*500
createCanvas(500, 500);
} function draw() {
// set background color
background(200);
fill( 'green' );
// set text and text size
textSize(100);
text(key, height / 2, width / 2);
if (keyIsPressed) {
textSize(40);
text( "is pressed" , height / 7, width - 50);
}
} |
Output:
Reference: https://p5js.org/reference/#/p5/key