The id() method of p5.Element in p5.js is used to set or return the ID of an element. When no ID is specified as a parameter, it returns the current ID of the element. Only one element on the page can have a particular ID specified to it.
Syntax:
id( id )
Parameters: This function accepts a single parameter as mentioned above and described below.
- id: It is a string that denotes the ID of the element.
Example 1: The example below illustrates the id() method in p5.js.
Javascript
function setup() { createCanvas(550, 300); textSize(18); text("Click on the button to create a new " + "element with the given ID", 20, 20); setBtn = createButton("Create new Element with ID"); setBtn.position(30, 40); setBtn.mouseClicked(createNewElement); setBtn = createButton("Show Last Element ID"); setBtn.position(300, 40); setBtn.mouseClicked(showID); id_name = createInput('tmpID'); id_name.position(30, 80); } function createNewElement() { clear(); // Create a new p5.Element tmpElement = createElement("p"); // Get the ID to set let idToSet = id_name.value(); // Set the ID of the element tmpElement.id(idToSet); text("New element created with ID: " + idToSet, 30, 120); text("Click on the button to create a new " + "element with the given ID", 20, 20); } function showID() { clear(); // Get the ID of the element let setID = tmpElement.id(); // Display the ID text("The ID of the last element is: " + setID, 30, 120); text("Click on the button to create a new " + "element with the given ID", 20, 20); } |
Output:
Example 2:
Javascript
function setup() { // Create a new canvas canv = createCanvas(550, 300); // Set the ID of the canvas canv.id("newCanvas"); textSize(18); text("Click on the button to show the ID " + "of the canvas element", 20, 20); setBtn = createButton("Show ID of the canvas"); setBtn.position(30, 40); setBtn.mouseClicked(showID); } function showID() { clear(); // Get the ID of the element let setID = canv.id(); // Display the ID text("The ID of the canvas is: " + setID, 20, 80); text("Click on the button to show the ID " + "of the canvas element", 20, 20); } |
Output:
Online editor: https://editor.p5js.org/
Environment Setup: https://www.neveropen.co.za/p5-js-soundfile-object-installation-and-methods/
Reference: https://p5js.org/reference/#/p5.Element/id
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