PROBLEM WITH DRAWSHAPE

[move_branding]

Helloo,

 

I have a image secuence working on scroll with scroll trigger, and it works mostly fine, but when i scroll the whole secuence and i scroll back, the console gives me this error:

Uncaught TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLCanvasElement or HTMLImageElement or HTMLVideoElement or ImageBitmap or OffscreenCanvas or SVGImageElement or VideoFrame)'.

 

Here is the js:

gsap.registerPlugin(ScrollTrigger,ScrollSmoother);

 

// Smooth Scroll

 

var smoother = ScrollSmoother.create({

smooth:2,speed:2,effects:!0,

 

});

 

function checkMedia(media) {

if (media.matches) {

smoother.kill()

} else {

smoother

}

}

 

var m = window.matchMedia('(max-width: 820px)');

 

checkMedia(m);

m.addListener(checkMedia);

 

// Scroll Trigger Image Secuence

const canvas = document.getElementById("hero-lightpass");

const context = canvas.getContext("2d");

 

canvas.width = 800;

canvas.height = 500;

 

 

const frameCount = 1100;

const currentFrame = (index) =>

`/dist/images/animacionlonglow/naw_test${(index + 1).toString().padStart(4, "0")}.png`;

 

const images = [];

const airpods = {

frame: 0

};

 

const imageUrls = [];

for (let i = 0; i < frameCount; i++) {

imageUrls.push(currentFrame(i));

}

 

for (let i = 0; i < imageUrls.length; i++) {

const img = new Image();

img.src = imageUrls[i];

images.push(img);

}

 

gsap.from(".scroll-title", {

opacity: 0,

y:100,

duration: 1,

delay: 3,

});

 

gsap.to(airpods, {

frame: frameCount + 1,

snap: "frame",

ease: "none",

scrollTrigger: {

trigger: ".canvas-container",

start: "top top",

end: "+=12000",

pin: true,

scrub: 0.5,

onUpdate: render,

 

images[0].onload = render;

 

function render() {

context.clearRect(0, 0, canvas.width, canvas.height);

context.drawImage(images[airpods.frame], 0, 0);

 

 

// . Texts Appear on Scroll / Frames

 

if (airpods.frame >= 100 && airpods.frame < 310) {

document.querySelector('#section-text-1').classList.add('active');

} else {

document.querySelector('#section-text-1').classList.remove('active');

}

if (airpods.frame >= 450 && airpods.frame < 600) {

document.querySelector('#section-text-2').classList.add('active');

} else {

document.querySelector('#section-text-2').classList.remove('active');

}

if (airpods.frame >= 700 && airpods.frame < 900) {

document.querySelector('#section-text-3').classList.add('active');

} else {

document.querySelector('#section-text-3').classList.remove('active');

}

if (airpods.frame >= 990 && airpods.frame < 1200) {

document.querySelector('#section-text-4').classList.add('active');

} else {

document.querySelector('#section-text-4').classList.remove('active');

};

 

 

};

 

Let see if someone know the issue, and also can give me a good way to preload all the image secuence before loading the page.

 

Thanks a lot

[GSAP Helper]

It's pretty tough to troubleshoot without a minimal demo - the issue could be caused by CSS, markup, a third party library, your browser, an external script that's totally unrelated to GSAP, etc. Would you please provide a very simple CodePen or CodeSandbox that demonstrates the issue? 

 

Please don't include your whole project. Just some colored <div> elements and the GSAP code is best (avoid frameworks if possible). See if you can recreate the issue with as few dependancies as possible. If not, incrementally add code bit by bit until it breaks. Usually people solve their own issues during this process! If not, then at least we have a reduced test case which greatly increases your chances of getting a relevant answer.

 

Here's a starter CodePen that loads all the plugins. Just click "fork" at the bottom right and make your minimal demo: 

See the Pen aYYOdN by GreenSock (@GreenSock) on CodePen

 

If you're using something like React/Next/Vue/Nuxt or some other framework, you may find StackBlitz easier to use. We have a series of collections with different templates for you to get started on these different frameworks: React/Next/Vue/Nuxt.

 

Once we see an isolated demo, we'll do our best to jump in and help with your GSAP-specific questions. 

[Rodrigo]

Hi,

 

Maybe this post by @OSUblake can help:

 

Happy Tweening!