안녕하세요. 실행 오류가 뜨는데 질문드립니다
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(() => { let yOffset = 0; //window.pageOffset 대신 쓸 수 있는 변수 let prevScrollHeight = 0 // 현재 스크롤 (yOffset)보다 이전에 위치한 스크롤 높이값의 함 let currentScene = 0; // 현재 활성화된 (눈앞에 보고 있는) 씬(scroll-section) let enterNewScene = false; const sceneInfo = [ { // 0 type: 'sticky', heightNum: 5, //브라우저 높이의 5배로 scrollheight 세팅 scrollHeight: 0, objs: { container: document.querySelector('#scroll-section-0'), messageA: document.querySelector('#scroll-section-0 .main-message.a'), messageB: document.querySelector('#scroll-section-0 .main-message.b'), messageC: document.querySelector('#scroll-section-0 .main-message.c'), messageD: document.querySelector('#scroll-section-0 .main-message.d') }, values: { // 글자 구간과 선명도를 지정 하는 역할 messageA_opacity_in: [0, 1, { start: 0.1, end: 0.2 }], messageB_opacity_in: [0, 1, { start: 0.3, end: 0.4 }], messageC_opacity_in: [0, 1, { start: 0.5, end: 0.6 }], messageD_opacity_in: [0, 1, { start: 0.7, end: 0.8 }], messageA_translate_in: [20, 0, { start: 0.1, end: 0.2 }], messageB_translate_in: [20, 0, { start: 0.3, end: 0.4 }], messageC_translate_in: [20, 0, { start: 0.5, end: 0.6 }], messageD_translate_in: [20, 0, { start: 0.7, end: 0.8 }], messageA_opacity_out: [1, 0, { start: 0.25, end: 0.3 }], messageB_opacity_out: [1, 0, { start: 0.45, end: 0.5 }], messageC_opacity_out: [1, 0, { start: 0.65, end: 0.7 }], messageD_opacity_out: [1, 0, { start: 0.85, end: 0.9 }], messageA_translate_out: [0, -20, { start: 0.25, end: 0.3 }], messageA_translate_out: [0, -20, { start: 0.45, end: 0.5 }], messageA_translate_out: [0, -20, { start: 0.65, end: 0.7 }], messageA_translate_out: [0, -20, { start: 0.85, end: 0.9 }], } }, { // 1 type: 'normal', // heightNum: 5, //브라우저 높이의 5배로 scrollheight 세팅 scrollHeight: 0, objs: { container: document.querySelector('#scroll-section-1') } }, { // 2 type: 'sticky', heightNum: 5, //브라우저 높이의 5배로 scrollheight 세팅 scrollHeight: 0, objs: { container: document.querySelector('#scroll-section-2'), messageA: document.querySelector('#scroll-section-2 .a'), messageB: document.querySelector('#scroll-section-2 .b'), messageC: document.querySelector('#scroll-section-2 .c'), pinB: document.querySelector('#scroll-section-2 .b .pin'), pinC: document.querySelector('#scroll-section-2 .c .pin'), }, values: { messageA_translateY_in: [20, 0, { start: 0.15, end: 0.2 }], messageB_translateY_in: [30, 0, { start: 0.6, end: 0.65 }], messageC_translateY_in: [30, 0, { start: 0.87, end: 0.92 }], messageA_opacity_in: [0, 1, { start: 0.25, end: 0.3 }], messageB_opacity_in: [0, 1, { start: 0.6, end: 0.65 }], messageC_opacity_in: [0, 1, { start: 0.87, end: 0.92 }], messageA_translateY_out: [0, -20, { start: 0.4, end: 0.45 }], messageB_translateY_out: [0, -20, { start: 0.68, end: 0.73 }], messageC_translateY_out: [0, -20, { start: 0.95, end: 1 }], messageA_opacity_out: [1, 0, { start: 0.4, end: 0.45 }], messageB_opacity_out: [1, 0, { start: 0.68, end: 0.73 }], messageC_opacity_out: [1, 0, { start: 0.95, end: 1 }], pinB_scaleY: [0.5, 1, { start: 0.6, end: 0.65 }], pinC_scaleY: [0.5, 1, { start: 0.87, end: 0.92 }] } }, { // 3 type: 'sticky', heightNum: 5, //브라우저 높이의 5배로 scrollheight 세팅 scrollHeight: 0, objs: { container: document.querySelector('#scroll-section-3') } }, ]; function setLayout() { // 각 section 의 높이 세팅 for (let i = 0; i < sceneInfo.length; i++) { if (sceneInfo[i].type === 'sticky') { sceneInfo[i].scrollHeight = sceneInfo[i].heightNum * window.innerHeight; } else if (sceneInfo[i].type === 'normal') { sceneInfo[i].scrollHeight = sceneInfo[i].objs.container.offsetHeight; } sceneInfo[i].objs.container.style.height = `${sceneInfo[i].scrollHeight}px` } let totalScrollHeight = 0; yOffset = window.pageYOffset; // 새로고침 버튼 눌렀을때 그 씬 장면이 유지 될 수 있게 해주는 역할 for (let i = 0; i < sceneInfo.length; i++) { totalScrollHeight += sceneInfo[i].scrollHeight; if (totalScrollHeight >= yOffset) { currentScene = i; break } } document.body.setAttribute('id', `show-scene-${currentScene}`) } function calcValues(values, currentYOffset) { let rv; //현재 씬(스크롤 섹션)애서 스크롤된 범위를 비율로 구하기 const scrollHeight = sceneInfo[currentScene].scrollHeight; const scrollRatio = currentYOffset / scrollHeight; if (values.length === 3) { // start ~ end 사이에 애니메이션 진행 const partStart = values[2].start * scrollHeight const partEnd = values[2].end * scrollHeight const partScrollHeight = partEnd - partStart; if (currentYOffset <= partEnd && currentYOffset >= partStart) { rv = (currentYOffset - partStart) / partScrollHeight * (values[1] - values[0]) + values[0]; } else if (currentYOffset < partStart) { rv = values[0]; } else if (currentYOffset > partEnd) { rv = values[1]; } } else { rv = scrollRatio * (values[1] - values[0]) + values[0]; } return rv; } function playAinmation() { const objs = sceneInfo[currentScene].objs; const values = sceneInfo[currentScene].values; const currentYOffset = yOffset - prevScrollHeight; const scrollHeight = sceneInfo[currentScene].scrollHeight; const scrollRatio = currentYOffset / scrollHeight; // console.log(currentScene) switch (currentScene) { case 0: // calcValues = (values의 선명도, 현재 스크롤의 위치 if (scrollRatio <= 0.22) { // in objs.messageA.style.opacity = calcValues(values.messageA_opacity_in, currentYOffset); objs.messageA.style.transform = `translateY(${calcValues(values.messageA_translate_in, currentYOffset)}%)`; } else { // out objs.messageA.style.opacity = calcValues(values.messageA_opacity_out, currentYOffset); objs.messageA.style.transform = `translateY(${calcValues(values.messageA_translate_out, currentYOffset)}%)`; } if (scrollRatio <= 0.42) { objs.messageB.style.opacity = calcValues(values.messageB_opacity_in, currentYOffset); objs.messageB.style.transform = `translateY(${calcValues(values.messageB_translate_in, currentYOffset)}%)` } else { objs.messageB.style.opacity = calcValues(values.messageB_opacity_out, currentYOffset); objs.messageB.style.transform = `translateY(${calcValues(values.messageB_translate_out, currentYOffset)}%)`; } if (scrollRatio <= 0.62) { objs.messageC.style.opacity = calcValues(values.messageC_opacity_in, currentYOffset); objs.messageC.style.transform = `translateY(${calcValues(values.messageC_translate_in, currentYOffset)}%)` } else { objs.messageC.style.opacity = calcValues(values.messageC_opacity_out, currentYOffset); objs.messageC.style.transform = `translateY(${calcValues(values.messageC_translate_out, currentYOffset)}%)`; } if (scrollRatio <= 0.82) { objs.messageD.style.opacity = calcValues(values.messageD_opacity_in, currentYOffset); objs.messageD.style.transform = `translateY(${calcValues(values.messageD_translate_in, currentYOffset)}%)` } else { objs.messageD.style.opacity = calcValues(values.messageD_opacity_out, currentYOffset); objs.messageD.style.transform = `translateY(${calcValues(values.messageD_translate_out, currentYOffset)}%)`; } break; case 1: break; case 2: break; case 3: break; } } function scrollLoop() { enterNewScene = false prevScrollHeight = 0 for (let i = 0; i < currentScene; i++) { prevScrollHeight += sceneInfo[i].scrollHeight; } if (yOffset > prevScrollHeight + sceneInfo[currentScene].scrollHeight) { enterNewScene = true currentScene++; document.body.setAttribute('id', `show-scene-${currentScene}`) } if (yOffset < prevScrollHeight) { enterNewScene = true if (currentScene === 0) // 브라우저 바운스 효과로 인해 마이너스가 되는 것을 방지 return currentScene--; document.body.setAttribute('id', `show-scene-${currentScene}`) } // 마이너스 나오는 오류를 잡아주기 위한 역할 if (enterNewScene) return; playAinmation() } window.addEventListener('scroll', () => { yOffset = window.pageYOffset; scrollLoop() }); window.addEventListener('resize', setLayout); window.addEventListener('load', setLayout); })()
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