Codrops 원본

Made With Gsap: Building a Fun Gravity-Based Mouse Trail

섹션 · MIT

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Made With Gsap: Building a Fun Gravity-Based Mouse Trail 정적 미리보기

갤러리 안에서는 화면을 벗어나거나 움직임을 멈추면 예제도 닫힙니다. 다시 재생할 때는 처음부터 시작해요.

큰 화면으로 보기

SOURCE FILES

원본 코드 읽기

5개 파일

수집한 원본 소스와 실행 안내를 함께 제공합니다.

assets/script.js

파일 저장

window.addEventListener("DOMContentLoaded", () => {
    const root = document.querySelector('.codrops_mwg')
    const images = []
    root.querySelectorAll('.medias img').forEach(image => {
        images.push(image.getAttribute('src'))
    })

    let incr = 0,
        oldIncrX = 0,
        oldIncrY = 0,
        firstMove = true,
        indexImg = 0

    const isCoarsePointer = window.matchMedia('(hover: none)').matches
    const resetDist = window.innerWidth / (isCoarsePointer ? 6 : 8)

    const W = window.innerWidth
    const H = window.innerHeight
    const clampX = gsap.utils.clamp(0, W)
    const clampY = gsap.utils.clamp(0, H)

    function applyMove(clientX, clientY) {
        const valX = clampX(clientX)
        const valY = clampY(clientY)

        if (firstMove) {
            firstMove = false
            oldIncrX = valX
            oldIncrY = valY
            return
        }

        incr += Math.abs(valX - oldIncrX) + Math.abs(valY - oldIncrY)

        if (incr > resetDist) {
            incr = 0
            createMedia(valX, valY - root.getBoundingClientRect().top, valX - oldIncrX, valY - oldIncrY)
        }

        oldIncrX = valX
        oldIncrY = valY
    }

    function handleMouseMove(e) {
        applyMove(e.clientX, e.clientY)
    }

    function handleTouchMove(e) {
        if (!e.touches || !e.touches[0]) return
        applyMove(e.touches[0].clientX, e.touches[0].clientY)
    }

    root.addEventListener('mousemove', handleMouseMove)
    root.addEventListener('touchstart', handleTouchMove, { passive: true })
    root.addEventListener('touchmove', handleTouchMove, { passive: true })

    function createMedia(x, y, deltaX, deltaY) {
        const H = window.innerHeight

        if (y > H - 200) return

        const image = document.createElement("img")


        image.setAttribute('src', images[indexImg])
        root.appendChild(image)
    
        const tl = gsap.timeline({
            onComplete: () => {
                root.removeChild(image);
                tl && tl.kill()
            }
        })
    
        tl.fromTo(image, {
            xPercent: -50 + (Math.random() - 0.5) * 80,
            yPercent: -50 + (Math.random() - 0.5) * 10,
            scaleX: 1.3,
            scaleY: 1.3,
            rotation:(Math.random() - 0.5) * 20
        }, {
            scaleX:1,
            scaleY:1,
            ease: 'elastic.out(2, 0.6)',
            duration: 0.4
        })

        tl.fromTo(image, {
            x,
        }, {
            x: '+=' + deltaX * 2,
            rotation: 0,
            ease: 'power1.in',
            duration: 0.4
        }, '<')
    
        tl.fromTo(image, {
            y
        }, {
            y: '+=' + (H - y),
            scale: 0.9,
            yPercent: -95, // pour que le bord bas s'arrête pile au bas du viewport combiné avec le scale a 0.9
            ease: 'back.in(1.1)',
            duration: 0.4
        }, '<')
        
        // BOUNCE
        tl.to(image, {
            x: '+=' + deltaX * 1.6,
            rotation:(Math.random() - 0.5) * 40,
            ease: 'power1.in',
            duration: 0.3
        })
        tl.to(image, {
            yPercent: 150,
            ease: 'back.in(' + (1.5 + (1 - y/H)) + ')',
            duration: 0.3
        }, '<')
    
        indexImg = (indexImg + 1) % images.length
    }


    // KILL
    const observer = new MutationObserver(mutations => {
        const isRootRemoved = mutations.some(mutation => 
            mutation.type === 'childList' && 
            Array.from(mutation.removedNodes).includes(root)
        )
        
        if (isRootRemoved) {
            root.removeEventListener('mousemove', handleMouseMove)
            root.removeEventListener('touchstart', handleTouchMove, { passive: true })
            root.removeEventListener('touchmove', handleTouchMove, { passive: true })
            observer.disconnect()
        }
    })
    observer.observe(document.body, {childList: true, subtree: true})
})

assets/style.css

파일 저장

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@500;800&display=swap');

/* NORMALIZE */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    appearance: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
/* NORMALIZE */

body {
    background: #121212;
    color: #F1F1F1;
    font: 500 normal 22px/1.3 'Inter', sans-serif;
}

/* to prevent scroll bumps, remove this if you want to keep the flow of the page */
html:has(.codrops_mwg), 
body:has(.codrops_mwg) {
    overflow: hidden;
}

.codrops_mwg {
    height: 100dvh;
    overflow: hidden;
    position: relative;
}

.codrops_mwg .content-effect {
    font-size: min(60px, 5.6vw);
    text-align: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    position: absolute;
    align-items: center;
    letter-spacing: -0.03em;

    span { 
        display: block;
        width: max-content;
    }
    span:last-child {
        color: #999;
    }
}

.codrops_mwg img {
    width: 15vw;
    height: 15vw;
    position: absolute;
    object-fit: cover;
    border-radius: 4%;
    z-index: 5;
}

.codrops_mwg .medias img {
    width: 1px;
    height: 1px;
    top: 0;
    left: 0;
    position: absolute;
    visibility: hidden;
    pointer-events: none;
}

@media (max-width: 768px) {
    .codrops_mwg img {
        width: 35vw;
        height: 35vw;
    }
}

함께 쓰는 파일 3개 보기

index.html

파일 저장

<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>Codrops — Made With Gsap</title>
		<link rel="stylesheet" href="assets/style.css">
		<link rel="icon" type="image/png" href="assets/favicon-96x96.png" sizes="96x96" />
	</head>
	<body>
		<section class="codrops_mwg">
			<p class="content-effect">
                <span>Move your mouse to make</span>
                <span>images fall and bounce</span>
            </p>
            <div class="medias">
                <img src="assets/medias/01.png" alt="">
                <img src="assets/medias/02.png" alt="">
                <img src="assets/medias/03.png" alt="">
                <img src="assets/medias/04.png" alt="">
                <img src="assets/medias/05.png" alt="">
                <img src="assets/medias/06.png" alt="">
                <img src="assets/medias/07.png" alt="">
                <img src="assets/medias/08.png" alt="">
                <img src="assets/medias/09.png" alt="">
                <img src="assets/medias/10.png" alt="">
            </div>
		</section>

		<!-- GSAP -->
		<script src="https://cdn.jsdelivr.net/npm/gsap@3.15/dist/gsap.min.js"></script>

		<!-- EFFECT CODE -->
		<script src="assets/script.js"></script>
	</body>
</html>

Original author attribution실행 안내·자료

파일 저장

Made With Gsap: Building a Fun Gravity-Based Mouse Trail
Original author: Made With Gsap
Published by Codrops. Copyright (c) 2026 Codrops.
License: MIT, pursuant to the publisher's downloadable-demo grant.
Keep CODROPS-MIT-2026.txt and the original project notices with copies.
Third-party media exceptions and credits are recorded separately in the source inventory.

Bundled dependency licenses실행 안내·자료

파일 저장

GSAP standard license snapshot
Source: https://gsap.com/community/standard-license/
Retrieved: 2026-09-22T04:22:49.089Z
Original distribution copyright and version headers remain in the runtime code.

Standard "No Charge" GSAP License

 I. DEFINITIONS

 “GSAP License” means the terms and conditions of this GSAP Software License Agreement.

 "GSAP Products" means any Software made available at gsap.com (https://gsap.com) or any successor sites, including but not limited to the GSAP animation library and related plugins, tools, or extensions.

 "Permitted Uses" means the implementation and/or use of GSAP Products on any website, web application, or digital interface by any person or entity (which may include, for clarity, those of companies that compete with Webflow in other areas of business).

 "Prohibited Uses" means any implementation and/or use of GSAP Products in tools that allow users to build visual animations without code that encourages, induces, or materially assists in creating a solution that competes with Webflow’s visual animation building capabilities.

 "Competitive Products" means any software, tool, or service that enables users to create, edit, or manage animations through a visual interface or builder similar to Webflow (https://webflow.com).

 II. GRANT OF LICENSE

 Subject to the terms and conditions of this GSAP License, Webflow grants you a non-exclusive, worldwide license to use, reproduce, display, and implement GSAP Products solely for Permitted Uses.

 III. RESTRICTIONS

 You may not:

 Use any GSAP Products for any Prohibited Uses without prior written consent;

 Reverse engineer any GSAP Products for the purpose of creating Competitive Products;

 Remove or alter any proprietary notices or branding from GSAP Products.

 IV. OWNERSHIP AND INTELLECTUAL PROPERTY

 All intellectual property rights in GSAP Products, including but not limited to copyright, patents, trademarks, and trade secrets, remain the exclusive property of Webflow. This GSAP License does not transfer any ownership rights in GSAP Products to you.

 V. TERMINATION

 Webflow may terminate this GSAP License and revoke your access in its discretion if you fail to comply with any of these terms and conditions. Upon termination, you must cease all use of GSAP Products and destroy all copies in your possession.

 VI. MISCELLANEOUS PROVISIONS

 General: This GSAP License is incorporated into and subject to Webflow’s Terms of Service available here (https://webflow.com/legal/terms) ("Terms of Service"). In the event of any conflict or inconsistency between this GSAP License and the Terms of Service, the terms of this GSAP License shall govern in relation to your use of any GSAP Products.

 Amendments: Webflow reserves the right to update or modify this GSAP License at any time by posting the revised terms on this website, provided that any such updates or modifications shall not result in any material degradation to the security, integrity, or functionality of any GSAP Products. You understand and agree that your continued use of any GSAP Products after such revisions to this GSAP License constitutes your acceptance of this GSAP License as revised. If you do not accept the revised GSAP License, you are prohibited from using versions of the GSAP Products released after the effective date of the revised GSAP License (as well as any updates made to previous versions). Notwithstanding, you may continue using previous versions of GSAP Products under the applicable terms licensed to you prior to the effective date of the revised GSAP License (for clarity, excluding any updates made thereto).

 No Waiver: Failure of Webflow to enforce any provision of this GSAP License shall not constitute a waiver of future enforcement of that or any other provision.

 FAQ

 Is it acceptable for AI tools like ChatGPT, Cursor, Lovable, Webstudio, etc. to generate GSAP code?
 Absolutely! AI-generated code is not a "Prohibited Use".

 What if a WordPress plugin or theme or other niche tool allows users to create GSAP-driven effects through a visual interface? Is that prohibited?
 We want to encourage developers to build on top of GSAP, including visual tools that don't directly compete with Webflow's rich animation-building capabilities. If you are not sure if your product might be considered a "Prohibited Use", feel free to contact us (https://gsap.com/contact) so we can talk through it!

 Can I really use GSAP in commercial projects without paying anything?
 Yes, really! Commercial usage is covered under the standard license. All of GSAP including the plugins that were formerly "members-only" like SplitText (https://gsap.com/docs/v3/Plugins/SplitText/) and MorphSVG (https://gsap.com/docs/v3/Plugins/MorphSVGPlugin) can be used in commercial projects at no charge. Enjoy! 💚

 Effective date: April 30, 2025

 Last modified date: May 30, 2025

 Copyright (©) 2025, Webflow

BEHIND THE EXAMPLE

이 장면을 만드는 원리

Design Engineering
포인터 누적 거리로 한 장씩 만드는 낙하 꼬리
입력·상태·출력·수명과 실제 결과를 명시합니다.
이 예제에서는
applyMove는 처음 입력을 기준점으로만 저장하고 이후 x·y 이동의 절댓값 합을 누적합니다. 초기 화면 폭의 1/6 또는 1/8을 넘으면 한 장을 만들고 누적값을 0으로 지웁니다. createMedia는 아래 200px 구간의 생성을 건너뜁니다.
코드와 함께 확인하기
코드에서 찾기
- function applyMove(clientX, clientY)script.js
  입력 이벤트 수가 아니라 이동 거리 임계값으로 이미지 생성 빈도를 정합니다.
전체 코드로 이동
직접 해보기
1. 원본에서 같은 경로를 느리게·빠르게 이동하고 resize 뒤 다시 움직입니다.
  살펴볼 변화초기 clamp·임계값이 바뀐 화면에 맞는지와 큰 한 번의 이동에서 초과 거리를 버리는 정책이 꼬리 밀도에 주는 영향을 확인해야 합니다.

포인터 누적 거리로 한 장씩 만드는 낙하 꼬리↗

코드에서 찾기

직접 해보기

포인터 누적 거리로 한 장씩 만드는 낙하 꼬리