让代码更简单

prettyprint快速添加代码高亮着色效果

重要:本文最后更新于2019-01-05 08:48:57,某些文章具有时效性,若有错误或已失效,请在下方留言或联系代码狗

代码高亮网上插件很多,prettyprint.js就是一款可以实现代码高亮的插件,并且配合css,可以让你的代码附加颜色,如代码狗博客的代码展示效果。下面就是prettyprint快速添加代码高亮着色效果的实现步骤。

prettyprint快速添加代码高亮着色效果

prettyprint快速添加代码高亮着色效果

实现原理

prettyprint.js会自动选择class名为prettyprint的html目标元素,并给该元素的内容按照一定的规则添加上<span>标签,这些span标签会被附加上一些class名称,我们可以在css中提前设置好对应的颜色,等到prettyprint.js修改完成后就会自动应用我们的颜色给代码着色了。

实现步骤

首先引入prettyprint.js文件,如果你不想增加你的网页请求数,请直接复制下面的代码到你的主题js文件中,如果你不在乎增加请求数,你可以直接将下面的代码保存为prettyprint.js文件,通过下面的代码引用。

复制
<script type="text/javascript" src="/prettyprint.js"></script>

prettyprint.js代码如下:

复制
// prettyprint
eval(function(p, a, c, k, e, r) {
    e = function(c) {
        return (c < 62 ? '': e(parseInt(c / 62))) + ((c = c % 62) > 35 ? String.fromCharCode(c + 29) : c.toString(36))
    };
    if ('0'.replace(0, e) == 0) {
        while (c--) r[e(c)] = k[c];
        k = [function(e) {
            return r[e] || e
        }];
        e = function() {
            return '([6P-RT-Y]|[1-3]\\w)'
        };
        c = 1
    };
    while (c--) if (k[c]) p = p.replace(new RegExp('\\b' + e(c) + '\\b', 'g'), k[c]);
    return p
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'||||||var|||||||||||||||||||||||||||||||||||||||||||||for|length|push||if|function|return|substring|lang|keywords||||||else|case||className|parentNode|window|match|break|nextSibling|hashComments|replace|pln|cStyleComments||test|Math|str|com|appendChild|charAt|firstChild|multiLineStrings|regexLiterals|style|null|void|nodeType|nodeValue|document|try|default|import|until|||||max|join|currentStyle|getComputedStyle|pre|typeof|undef|delete||finally|pun|createElement|console|code|while|class|false|true|eval|unless|xmp|css|tag|now|tagName|charCodeAt|122|min|NaN||throw|switch|nocode|string|indexOf|hasOwnProperty|tripleQuotedStrings|elif|types|typ|lit|createTextNode|catch|stack|goto|new|package|super|foreach||set|and|not||print|elsif|next|redo|then|BEGIN|END|local||atv|getElementsByTagName|PR_SHOULD_USE_CONTINUATION|parseInt|String|fromCharCode|||apply|source|ignoreCase||global|RegExp|nodeName|||whiteSpace|defaultView|getPropertyValue|white|space|||src|verbatimStrings|regex|continue|instanceof|kwd|xa0||removeChild|index|insertBefore|ownerDocument|override|markup|float|int|export|extends|||from|with|Infinity|def|yield|when|caller|die|dump|exit|last||our|require|sub|use|wantarray|dec|script|atn||val|innerHTML|250|prettyprint|Date'.split('|'), 0, {}));

到这一步还并不能高亮,你需要使用prettyPrint();方法来启动,启动后网页中class名为prettyprint的元素内容将被自动高亮着色显示,但是我们不可能每次写文章时还手动添加class名称,所以我们可以使用js代码,自动给目标html标签添加class名称,实现代码着色高亮显示,下面演示将<pre>标签自动着色使用实例,注意下面的代码需要jQuery支持。

复制
$(document).ready(function() {
$(".wp-container pre").addClass("prettyprint");//添加class
prettyPrint();//启动高亮着色
});

上面使用jQuery选择器选择了class名为wp-container标签内的pre标签,并为它添加class=”prettyprint”属性。效果就是上面代码显示样子,可以丢掉插件了,请求数减少2次,网站速度优化又提升一步。

感觉很棒!可以赞赏支持我哟~

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