HTML5-Fortschrittsbalken Spezialeffekte_HTML5-Tutorial-Fähigkeiten

Bitte verwenden Sie einen Browser, der HTML5 unterstützt, um diesen Spezialeffekt anzuzeigen

Code kopieren Der Code lautet wie folgt: HTML5有特色的进度条 body { background: #111; color:White; %; Rand: -51px 0 0 -201px; Position: absolut; oben: 50%; } /*======================== =====================*/ /* Light Loader /*============== ==================================*/ var lightLoader = function (c, cw, ch) { var _this = this; this.c = c; this.ctx = c.getContext('2d'); this.cw = cw; this. ch = ch; this.loaded = 0; this.loaderSpeed = .6; this.loaderHeight = 10; this.loaderWidth = 310; this.loader = { x: (this.cw / 2) - (this.loaderWidth / 2), y: (this.ch / 2) - (this.loaderHeight / 2) }; this. Partikel = []; this.particleLift = 180; this.hueStart = 0 this.hueEnd = 120; this.hue = 0; this.gravity = .15; this.particleRate = 4; /*=================================== ===================*/ /* Initialisieren /*================= =====================================*/ this.init = function ( ) { this.loop(); }; /*============================= =========================*/ /* Hilfsfunktionen /*========= ============================================*/ this.rand = function (rMi, rMa) { return ~ ~((Math.random() * (rMa - rMi 1)) rMi); }; this.hitTest = function (x1, y1, w1, h1, x2, y2, w2, h2) { return !(x1 w1 /*========================================= =============*/ /* Update Loader /*====================== ================================*/ this.updateLoader = function () { if (this.loaded this.loaded = this.loaderSpeed; } else { this.loaded = 0; } }; /*= =============================================== =====*/ /* Render Loader /*============================== ========================*/ 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); }; /*============ =========================================*/ / * Partikel /*========================================= =============*/ 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.height = _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; this.y = this.vy; 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; while (i- -) { 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; while (i--) { var p = this.particles[i]; p.render() ; }; };

/*========================================== ============*/ /* Klare Leinwand /*======================== ===============================*/ this.clearCanvas = function () { this. ctx.globalCompositeOperation = 'source-over'; this.ctx.clearRect(0, 0, this.cw, this.ch); this.ctx.globalCompositeOperation = 'lighter'; }; /*======== =============================================*/ /* Animationsschleife /*===================================== ==================*/ this.loop = function () { var loopIt = function () { requestAnimationFrame(loopIt, _this. c); _this.clearCanvas(); _this.createParticles(); _this.updateLoader(); _this.updateParticles(); _this.renderLoader(); _this.renderParticles(); }; loopIt(); }; }; /*================ ======================================*/ /* Überprüfen Sie die Canvas-Unterstützung /*=========================================== ===========*/ var isCanvasSupported = function () { var elem = document.createElement('canvas'); return !!(elem.getContext && elem .getContext('2d')); }; /*============================== =======================*/ /* Setup requestAnimationFrame /*=========== ==========================================*/ var setupRAF = function () { var lastTime = 0; var sellers = ['ms', 'moz', 'webkit', 'o']; for (var x = 0; 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(); var timeToCall = Math.max(0, 16 - (currTime - lastTime)); var id = window.setTimeout(function () { callback(currTime timeToCall); }, timeToCall ); lastTime = currTime timeToCall; return id; }; }; if (!window.cancelAnimationFrame) { window.cancelAnimationFrame = function (id) { clearTimeout(id); }; }; }; /*======================= ================================*/ /* Canvas definieren und initialisieren /*= =============================================== =====*/ if (isCanvasSupported) { var c = document.createElement('canvas'); c.width = 400; c.height = 100; var cw = c.width; var ch = c.height; document.body.appendChild(c); var cl = new lightLoader(c, cw, ch); setupRAF (); cl.init(); } HTML5进度条 请使用支持HTML5的浏览器查看本页

HTML5-Fortschrittsbalken Spezialeffekte_HTML5-Tutorial-Fähigkeiten

In Verbindung stehende Artikel