这几天在逛别人博客的时候，好几个站的评论界面打字都有礼花????特效，有的还有震动特效，所以就去搜了下，实现的方法非常简单，下面分享一下实现WordPress评论框烟花和震动特效的实现方法。
烟花特效js文件下载：
实现礼花绽放特效主要就是依靠的这个js文件，具体代码如下，你可以选择把下面的代码复制了新建为一个js文件，也可以直接点这里下。activate-power-mode.zip
(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}}())}])});
烟花评论特效具体实现步骤：
把下载的js文件上传到你网站，可以上传到你主题文件夹或者其他你习惯的文件夹里面。
然后编辑你主题的主题页脚 (footer.php)文件，加入下面这串代码
<?php if (is_single() || is_page() ) { ?>
<script src="<?php bloginfo('template_directory'); ?>/js/activate-power-mode.js "></script>
<script>
POWERMODE.colorful = true; // ture 为启用礼花特效
POWERMODE.shake = false; // false 为禁用震动特效
document.body.addEventListener('input', POWERMODE);
</script>
<?php }?>
添加位置你不知道加哪里就加到</body>标签前面。注意如果你不是把js文件上传到你主题文件夹下面的就需要修改script src=后面的位置信息。
方法来自从良未遂
另外，奶爸还分享了给WordPress添加网页背景特效的文章，感兴趣的话看一看：给WordPress网站添加线段吸附鼠标特效
