p5.js | windowWidth

The windowWidth variable in p5.js is a system variable that is used to store the width of the inner window and it maps to window.innerWidth.
Syntax:

windowWidth

Parameters: This function does not accept any parameter.

Below program illustrates the windowWidth variable in p5.js:
Example-1:



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function setup() {
    
    createCanvas(1000, 400);
    
    // Set text size to 40px
    textSize(20);
}
  
function draw() {
    background(200);
    
    rect(mouseX, mouseY, 30, 30);
    
    //Use of windowWidth Variable
    text("Window Width is " + windowWidth, 30, 40);
}

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Output:

Example-2:

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function setup() {
  
    // set height to window width 
    width = windowWidth;
  
    //create Canvas of size 380*80 
    createCanvas(width, 100);
}
  
function draw() {
    background(220);
    textSize(16);
    textAlign(CENTER);
    fill(color('Green'));
  
    //use of windowWidth variable
    text("windowWidth of Canvas is : "
         + width, width / 2, height / 2);
}

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Output:

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



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