JS实现关键词高亮显示正则匹配

//高亮关键字 text =>内容 words:关键词  tag 被包裹的标签//匹配每一个关键字字符function highLightKeywords(text, words, tag) {tag = tag || 'span';// 默认的标签，如果没有指定，使用spanvar i, len = words.length, re;for (i = 0; i < len; i++) {// 正则匹配所有的文本re = new RegExp(words[i], 'g');if (re.test(text)) {text = text.replace(re, '<'+ tag +' class="highlight">$&</'+ tag +'>');}}}return text;}

//匹配整个关键词 不拆分function highlight(text, words, tag) {// 默认的标签，如果没有指定，使用spantag = tag || 'span';var i, len = words.length,re;//匹配每一个特殊字符 ，进行转义var specialStr = ["*", ".", "?", "+", "$", "^", "[", "]", "{", "}", "|", "//", "(", ")", "/", "%"]; $.each(specialStr, function(i, item) {if(words.indexOf(item) != -1) {words = words.replace(new RegExp("//" + item, 'g'), "//" + item);}});//匹配整个关键词re = new RegExp(words, 'g');if(re.test(text)) {text = text.replace(re, '<' + tag + ' class="highlight">$&</' + tag + '>');}return text;}