p5.js | createSlider() Function

The createSlider() function in p5.js is used to create a slider (input) element in the DOM (Document Object Model). This function includes the p5.dom library. Add the following syntax in the head section.

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Syntax:

createSlider( min, max, value, step )

Parameters: This function accepts four parameters as mentioned above and described below:

  • min: It holds the minimum value of the slider.
  • max: It holds the maximum value of the slider.
  • value: It holds the default value of the slider.
  • step: It holds the step size of the slider.

Below programs illustrates the createSlider() function in p5.js:

Example: This example uses createSlider() function to change the r value of the background-color (in rgb format) using a slider.

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// Create a variable for the slider object
var color_slider;
  
function setup() {
    
    // Create a canvas of given size
    createCanvas(600, 300);
      
    // Create the slider
    color_slider = createSlider(0, 255, 125);
      
    // Set the position of slider on the canvas
    color_slider.position(150, 200);
}
  
function draw() {
    
    // Get the value of the slider
    // using .value() function
    col = color_slider.value();
      
    // Set the value of the background-color
    background(col, 200, 100);
}                    

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Output:

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



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