The mouseButton variable in p5.js is used to get automatically which kind of key is pressed on mouse. The value of the system variable mouseButton is either LEFT, RIGHT, or CENTER depending on which button was pressed last.
Syntax:
mouseButton
Below programs illustrate the mouseButton variable in p5.js:
Example 1: This example uses mouseButton variable to detect the mouse button.
function setup() {
// Create canvas
createCanvas(500, 500);
} function draw() {
// Set background color
background(237, 34, 93);
// Fill color
fill(0);
if (mouseIsPressed) {
if (mouseButton === LEFT) {
ellipse(height/2, width/2, 100, 100);
}
if (mouseButton === RIGHT) {
rect(height/2, width/2, 100, 100);
}
}
} |
Output:
Example 2: This example uses mouseButton variable to detect the mouse button.
function setup() {
// Create canvas
createCanvas(500, 500);
// Set the text size
textSize(40);
} function draw() {
// Set background color
background(237, 34, 93);
// Set the text color
fill(255);
// Check the status of the mouse
if (mouseIsPressed) {
text(mouseButton, height/2, width/2);
}
} |
Output:
Reference: https://p5js.org/reference/#/p5/mouseButton