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.

<script src=
"https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.5.11/addons/p5.dom.min.js">
</script>

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.

// 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);
}

Output:

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