bar kemajuan HTML5 kesan khas_html5 kemahiran tutorial

Sila gunakan penyemak imbas yang menyokong HTML5 untuk melihat kesan khas ini

Salin kod Kod tersebut adalah seperti berikut: HTML5有特色的进度条 badan { latar belakang: #111; warna:Putih; } a{color:White;} kanvas { latar belakang: #111; sempadan: 1px pepejal #171717; paparan: blok; kiri: 50 %; margin: -51px 0 0 -201px; kedudukan: mutlak; atas: 50%; } /*========================= ======================*/ /* Pemuat Ringan /*============= ====================================*/ var lightLoader = fungsi (c, cw, ch) { var _this = this; this.c = c; this.ctx = c.getContext('2d'); this.cw = cw; this. ch = ch; this.loader = 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) }; ini. zarah = []; this.particleLift = 180; this.hueStart = 0 this.hueEnd = 120; this.hue = 0; this.hueStart = .15; this.particleRate = 4; /*================================================ ====================*/ /* Mulakan /*================ ========================================*/ this.init = function ( ) { this.loop(); }; /*============================= ============================*/ /* Fungsi Utiliti /*========= ================================================*/ this.rand = fungsi (rMi, rMa) { return ~ ~((Math.random() * (rMa - rMi 1)) rMi); }; this.hitTest = fungsi (x1, y1, w1, h1, x2, y2, w2, h2) { return !(x1 w1 /*=========================================== ============================*/ /* Pemuat Kemas Kini /*======================== ==================================*/ this.updateLoader = fungsi () { jika (this.loaded this.loaded = this.loaderSpeed; } else { this.loaded = 0; } }; /*= =================================================== ===================*/ /* Pemuat Render /*============================== =========================*/ 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.loader / 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); }; /*============ =============================================*/ / * Zarah /*=========================================== =============*/ ini.Zarah = fungsi () { ini.x = _this.loader.x ((_this.loader / 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 .kemas kini = fungsi (i) { ini.vx = (_ini.rand(0, 6) - 3) / 100; ini.vy = _ini.graviti; ini.x = ini. 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 .panjang; sementara (i--) { var p = ini.zarah[i]; p.kemas kini(i); }; }; ini .renderParticles = function () { var i = this.particles.length; while (i--) { var p = this.particles[i]; p.render() ; }; };

/*================================================ ===========================*/ /* Kanvas Jelas /*========================= =================================*/ this.clearCanvas = function () { this. ctx.globalCompositeOperation = 'source-over'; this.ctx.clearRect(0, 0, this.cw, this.ch); this.ctx.globalCompositeOperation = 'lighter'; }; /*======== ===================================================*/ /* Gelung Animasi /*====================================== ===================*/ this.loop = function () { var loopIt = function () { requestAnimationFrame(loopIt, _this. c); _this.clearCanvas(); _this.createParticles(); _this.updateLoader(); _this.updateParticles(); _this.renderLoader(); _this.renderParticles(); }; loopIt(); }; }; /*================ =========================================*/ /* Semak Sokongan Kanvas /*============================================ ===========*/ var isCanvasSupported = function () { var elem = document.createElement('canvas'); return !!(elem.getContext && elem .getContext('2d')); }; /*============================= =========================*/ /* Permintaan persediaanAnimationFrame /*=========== ==============================================*/ var setupRAF = function () { var lastTime = 0; var vendors = ['ms', 'moz', 'webkit', 'o']; for (var x = 0; x window.requestAnimationFrame = window[vendor[x] 'RequestAnimationFrame']; window.cancelAnimationFrame = window[vendor[x] 'CancelAnimationFrame'] || window[vendor[x] 'CancelRequestAnimationFrame']; }; if (!window.requestAnimationFrame) { window.requestAnimationFrame = fungsi (panggilan balik, elemen) { 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); }; }; }; /*======================== ==================================*/ /* Takrifkan Kanvas dan Mulakan /*= =================================================== =====*/ 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的浏览器韥眡

bar kemajuan HTML5 kesan khas_html5 kemahiran tutorial

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