p5.js | Mouse | mouseIsPressed

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The mouseIsPressed system variable in p5.js is used to store the boolean value. If mouse is pressed then it stores True otherwise store False.

Syntax:

mouseIsPressed

Below programs illustrate the mouseIsPressed variable in p5.js:

Example 1: This example uses mouseIsPressed variable to check mouse is press or not.

function setup() { 
   
    // Create canvas of given size 
    createCanvas(500, 250); 
    
    // Set the text size 
    textSize(30);  
} 
    
function draw() { 
       
    // Set the background color 
    background('green'); 
       
    fill('white'); 
       
    // If mouse is pressed then if part will  
    // execute otherwise else part will execute 
    if (mouseIsPressed) { 
        text("Mouse is Pressed", 120, 100); 
    } 
    else { 
        text("Mouse is Released", 120, 100); 
    } 
} 

Output:

Example 2:

function setup() { 
  
    // Create Canvas of given size 
    createCanvas(300, 150); 
} 
   
function draw() { 
      
    // Set the background color 
    background('green'); 
      
    fill('white'); 
  
    // Use mouseIsPressed variable 
    if (mouseIsPressed) { 
        ellipse(50, 50, 50, 50); 
    }  
    else { 
        rect(25, 25, 50, 50); 
    } 
} 

Output:

Reference: https://p5js.org/reference/#/p5/mouseIsPressed

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