JQ烟花特效

JQ代码

/*
Template Name: 烟花特效
author: _犬's
url: http://mlldxe.cn/archives/541
*/
(function webpackUniversalModuleDefinition(root, factory) {
    if (typeof exports === 'object' && typeof module === 'object')
        module.exports = factory();
    else if (typeof define === 'function' && define.amd)
        define([], factory);
    else if (typeof exports === 'object')
        exports["POWERMODE"] = factory();
    else
        root["POWERMODE"] = factory()
}
)(this, function() {
    return (function(modules) {
        var installedModules = {};
        function __webpack_require__(moduleId) {
            if (installedModules[moduleId])
                return installedModules[moduleId].exports;
            var module = installedModules[moduleId] = {
                exports: {},
                id: moduleId,
                loaded: false
            };
            modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
            module.loaded = true;
            return module.exports
        }
        __webpack_require__.m = modules;
        __webpack_require__.c = installedModules;
        __webpack_require__.p = "";
        return __webpack_require__(0)
    }
    )([function(module, exports, __webpack_require__) {
        'use strict';
        var canvas = document.createElement('canvas');
        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;
        canvas.style.cssText = 'position:fixed;top:0;left:0;pointer-events:none;z-index:999999';
        window.addEventListener('resize', function() {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight
        });
        document.body.appendChild(canvas);
        var context = canvas.getContext('2d');
        var particles = [];
        var particlePointer = 0;
        POWERMODE.shake = true;
        function getRandom(min, max) {
            return Math.random() * (max - min) + min
        }
        function getColor(el) {
            if (POWERMODE.colorful) {
                var u = getRandom(0, 360);
                return 'hsla(' + getRandom(u - 10, u + 10) + ', 100%, ' + getRandom(50, 80) + '%, ' + 1 + ')'
            } else {
                return window.getComputedStyle(el).color
            }
        }
        function getCaret() {
            var el = document.activeElement;
            var bcr;
            if (el.tagName === 'TEXTAREA' || (el.tagName === 'INPUT' && el.getAttribute('type') === 'text')) {
                var offset = __webpack_require__(1)(el, el.selectionStart);
                bcr = el.getBoundingClientRect();
                return {
                    x: offset.left + bcr.left,
                    y: offset.top + bcr.top,
                    color: getColor(el)
                }
            }
            var selection = window.getSelection();
            if (selection.rangeCount) {
                var range = selection.getRangeAt(0);
                var startNode = range.startContainer;
                if (startNode.nodeType === document.TEXT_NODE) {
                    startNode = startNode.parentNode
                }
                bcr = range.getBoundingClientRect();
                return {
                    x: bcr.left,
                    y: bcr.top,
                    color: getColor(startNode)
                }
            }
            return {
                x: 0,
                y: 0,
                color: 'transparent'
            }
        }
        function createParticle(x, y, color) {
            return {
                x: x,
                y: y,
                alpha: 1,
                color: color,
                velocity: {
                    x: -1 + Math.random() * 2,
                    y: -3.5 + Math.random() * 2
                }
            }
        }
        function POWERMODE() {
            {
                var caret = getCaret();
                var numParticles = 5 + Math.round(Math.random() * 10);
                while (numParticles--) {
                    particles[particlePointer] = createParticle(caret.x, caret.y, caret.color);
                    particlePointer = (particlePointer + 1) % 500
                }
            }
            {
                if (POWERMODE.shake) {
                    var intensity = 1 + 2 * Math.random();
                    var x = intensity * (Math.random() > 0.5 ? -1 : 1);
                    var y = intensity * (Math.random() > 0.5 ? -1 : 1);
                    document.body.style.marginLeft = x + 'px';
                    document.body.style.marginTop = y + 'px';
                    setTimeout(function() {
                        document.body.style.marginLeft = '';
                        document.body.style.marginTop = ''
                    }, 75)
                }
            }
        }
        ;POWERMODE.colorful = false;
        function loop() {
            requestAnimationFrame(loop);
            context.clearRect(0, 0, canvas.width, canvas.height);
            for (var i = 0; i < particles.length; ++i) {
                var particle = particles[i];
                if (particle.alpha <= 0.1)
                    continue;
                particle.velocity.y += 0.075;
                particle.x += particle.velocity.x;
                particle.y += particle.velocity.y;
                particle.alpha *= 0.96;
                context.globalAlpha = particle.alpha;
                context.fillStyle = particle.color;
                context.fillRect(Math.round(particle.x - 1.5), Math.round(particle.y - 1.5), 3, 3)
            }
        }
        requestAnimationFrame(loop);
        module.exports = POWERMODE
    }
    , function(module, exports) {
        (function() {
            var properties = ['direction', 'boxSizing', 'width', 'height', 'overflowX', 'overflowY', 'borderTopWidth', 'borderRightWidth', 'borderBottomWidth', 'borderLeftWidth', 'borderStyle', 'paddingTop', 'paddingRight', 'paddingBottom', 'paddingLeft', 'fontStyle', 'fontVariant', 'fontWeight', 'fontStretch', 'fontSize', 'fontSizeAdjust', 'lineHeight', 'fontFamily', 'textAlign', 'textTransform', 'textIndent', 'textDecoration', 'letterSpacing', 'wordSpacing', 'tabSize', 'MozTabSize'];
            var isFirefox = window.mozInnerScreenX != null;
            function getCaretCoordinates(element, position, options) {
                var debug = options && options.debug || false;
                if (debug) {
                    var el = document.querySelector('#input-textarea-caret-position-mirror-div');
                    if (el) {
                        el.parentNode.removeChild(el)
                    }
                }
                var div = document.createElement('div');
                div.id = 'input-textarea-caret-position-mirror-div';
                document.body.appendChild(div);
                var style = div.style;
                var computed = window.getComputedStyle ? getComputedStyle(element) : element.currentStyle;
                style.whiteSpace = 'pre-wrap';
                if (element.nodeName !== 'INPUT')
                    style.wordWrap = 'break-word';
                style.position = 'absolute';
                if (!debug)
                    style.visibility = 'hidden';
                properties.forEach(function(prop) {
                    style[prop] = computed[prop]
                });
                if (isFirefox) {
                    if (element.scrollHeight > parseInt(computed.height))
                        style.overflowY = 'scroll'
                } else {
                    style.overflow = 'hidden'
                }
                div.textContent = element.value.substring(0, position);
                if (element.nodeName === 'INPUT')
                    div.textContent = div.textContent.replace(/\s/g, "\u00a0");
                var span = document.createElement('span');
                span.textContent = element.value.substring(position) || '.';
                div.appendChild(span);
                var coordinates = {
                    top: span.offsetTop + parseInt(computed['borderTopWidth']),
                    left: span.offsetLeft + parseInt(computed['borderLeftWidth'])
                };
                if (debug) {
                    span.style.backgroundColor = '#aaa'
                } else {
                    document.body.removeChild(div)
                }
                return coordinates
            }
            if (typeof module != "undefined" && typeof module.exports != "undefined") {
                module.exports = getCaretCoordinates
            } else {
                window.getCaretCoordinates = getCaretCoordinates
            }
        }())
    }
    ])
});

调用

/* 鼠标特效 */
var a_idx = 0;
jQuery(document).ready(function($) {
   $("body").click(function(e) {
       var a = new Array("富强", "民主","文明","和谐","自由","平等","公正","法治","爱国","敬业","诚信","友善");
       var $i = $("<span/>").text(a[a_idx]);
       a_idx = (a_idx + 1) % a.length;
       var x = e.pageX,
       y = e.pageY;
       $i.css({
           "z-index": 99999,
           "top": y - 20,
           "left": x,
           "position": "absolute",
           "font-weight": "bold",
           "color": "#ff6651"
       });
       $("body").append($i);
       $i.animate({
           "top": y - 180,
           "opacity": 0
       },
       1500,
       function() {
           $i.remove();
       });
   });
});