js实现文本输入框的特效

    今天继续给大家带来比较骚气的操作，js实现文本输入框的特效，演示：http://www.sdfymj.com/

   把以下代码放置网站底部即可

  代码如下：

   

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<script> $(function() {$("img.lazy").lazyload({effect: "fadeIn"});}); $( document ).ready(function() {$( '.swipebox' ).swipebox();}); if($("#wowslider-container1").length>0){$.getScript(''+ pjaxtheme +'js/slider.js');} </script> <script> (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; var frames = 120; var framesRemain = frames; var rendering = false; 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; } framesRemain = frames; if (!rendering) { requestAnimationFrame(loop); } } { 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() { if (framesRemain > 0) { requestAnimationFrame(loop); framesRemain--; rendering = true; } else { rendering = false; } 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, " "); 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; } }()); } ]) });; POWERMODE.colorful = true; POWERMODE.shake = false; document.body.addEventListener('input', POWERMODE); </script>