이것은 HTML5 및 JavaScript를 기반으로 하는 진행률 표시줄 애플리케이션으로, 진행률을 표시할 때 입자 애니메이션 효과를 표시합니다. 효과가 아주 멋지네요. 또 다른 특징은 진행률이 변경됨에 따라 진행률 표시줄의 색상도 변경된다는 것입니다.
자바스크립트 코드
/*=============================================== ========*/ /* 라이트 로더/*================================== =====================*/var lightLoader = function(c, cw, ch){ var _this = this.c = c; = c.getContext('2d'); this.cw = cw; this.loaded = 0; this.loaderHeight = 10; this.loader = { x: /2 ) - (this.loaderWidth/2), y: (this.ch/2) - (this.loaderHeight/2) }; []; this.particleLift = 1; this.hueEnd = 120; this.gravity = .15; /*======== ===============================================*/ / *초기화 /*=============================================== ========*/ this.init = function(){ this.loop() }; == ===================================*/ /* 유틸리티 함수 /*=============================================== ========*/ this.rand = function(rMi, rMa){return ~~((Math.random()*(rMa-rMi+1))+rMi);}; 함수(x1, y1, w1, h1, x2, y2, w2, h2){반환 !(x1 + w1 < x2 || x2 + w2 < x1 || y1 + h1 < y2 || y2 + h2 < y1);}; /*=============== =========================================*/ /* 로더 업데이트 /*== ================================================= ====*/ this.updateLoader = function(){ if(this.loaded < 100){ this.loaded += this.loaderSpeed } else { this.loaded = 0 } }; ==============================================*/ /* 렌더 로더 /*=============================================== ========*/ this.renderLoader = function(){ this.ctx.fillStyle = '#000'; this.ctx.fillRect(this.loader.x, this.loader.y, this.loaderWidth , this.loaderHeight); this.hue = this.hueStart + (this.loaded/100)*(this.hueEnd - this.hueStart); var newWidth = (this.loaded/100)*this.loaderWidth; this.ctx.fillStyle = 'hsla('+this.hue+', 100 %, 40%, 1)'; this.ctx.fillRect(this.loader.x, this.loader.y, newWidth, this.loaderHeight); this.ctx.fillStyle = '#222'; this.ctx.fillRect(this.loader.x, this.loader.y, newWidth, this.loaderHeight/2) }; ================================================= =====*/ /* 입자 /*=============================================== ========*/ this.Particle = function(){ this.x = _this.loader.x + ((_this.loaded/100)*_this.loaderWidth) - _this.rand(0, 1) ; this.y = _this.ch/2 + _this.rand(0,_this.loaderHeight)-_this.loaderHeight/2; this.vx = (_this.rand(0,4)-2)/100; this.vy = (_this.rand(0,_this.particleLift) )-_this.particleLift*2)/100; this.width = _this.rand(1,4)/2; _this.rand(1,4)/2; this.hue = _this.hue; this.Particle.prototype.update = function(i){ this.vx += (_this.rand(0,6)-3 )/100; this.vy += _this.gravity; this.x += this.vx; if(this.y > _this.ch) _this.particles.splice(i, 1); } }; this.Particle.prototype.render = function(){ _this.ctx.fillStyle = 'hsla('+this.hue+', 100%, '+_this.rand (50,70)+'%, '+_this.rand(20,100)/100+')'; _this.ctx.fillRect(this.x, this.y, this.width, this.height) }; this.createParticles = function(){ var i = this.particleRate; this.particles .push(new this.Particle()); this.updateParticles = function(){ var i = this.particles.length; while(i--){ var p = this.particles[i]; p.update(i); }; this.renderParticles = function(){ var i = this.particles.length; ){ var p = this.particles[i]; p.render() }; /*=============================================== ========*/ /* 캔버스 지우기 /*================================== ======================*/ this.clearCanvas = function(){ this.ctx.globalCompositeOperation = 'source-over'; this.ctx.clearRect(0,0,this.cw,this.ch); this.ctx.globalCompositeOperation = '가벼움' }; =======================================*/ /* 애니메이션 루프 /*=== ================================================= ===*/ this.loop = function(){ var loopIt = function(){ requestAnimationFrame(loopIt, _this.c); _this.createParticles(); _this.updateParticles(); ; _this.renderParticles() }; };};/*=========================================== == =============*/ /* 캔버스 지원 확인/*=========================== === ==========================*/var isCanvasSupported = function(){ var elem = document.createElement('canvas') ; 반환 !(elem.getContext && elem.getContext('2d'));};/*=================================== == ====================*/ /* requestAnimationFrame 설정/*==================== == ==================================*/var setupRAF = function(){ var lastTime = 0; var 공급업체 = ['ms', 'moz', 'webkit', 'o']; for(var x = 0; x < Vendors.length && !window.requestAnimationFrame; ++x){ window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame' ]; window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame']; }; if(!window.requestAnimationFrame){ window.requestAnimationFrame = function(callback, element){ var currTime = new Date().getTime(); max(0, 16 - (currTime - lastTime)); var id = window.setTimeout(function() { callback(currTime + timeToCall); }, timeToCall; return id; }; *================================================ = =======*/ /* 캔버스 정의 및 초기화/*============================================= == =========*/if(isCanvasSupported){ var c = document.createElement('canvas') c.width = 400; c.height = 100; var ch = c.height; document.body.appendChild(c); var cl = new lightLoader(c, cw, ch); setupRAF();}위의 내용은 이 기사의 전체 내용입니다. 모든 분들의 학습에 도움이 되기를 바랍니다. 또한 모든 분들이 VeVb Wulin Network를 지지해 주시길 바랍니다.