javascript - jQuery 在高亮段落中一次又一次地添加相同的文本

Question

我有一个带有文本类型的输入，然后我执行单击，匹配器文本将突出显示。突出显示的作品，但对于每个段落，它都会添加一个具有相同文本的新段落。在这里您可以找到我创建的jsfiddle ，也许它会帮助解决我的问题

$(document).ready(function() {
  $("#searchButton").click(function() {
    searchHighlight($("#search").val());
  });
});

function searchHighlight(searchText) {
  if (searchText) {
    var searchExp = new RegExp(searchText, "ig");
    var content = $('p').text();
    var matches = content.match(searchExp);
    if (matches) {
      $('p').html(content.replace(searchExp, function(match) {
        return "<span class='highlight'>" + match + "</span>";
      }));
    } else {
      $(".highlight").removeClass(".highlight");
    }
  } else {
    $(".highlight").removeClass(".highlight");
  }
}

.highlight {
  background: yellow;
  font-weight: bold;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
  <form class="form-inline">
    <label class="sr-only" for="search">Search</label>
    <div class="input-group">
      <input id="search" type="text" class="form-control" placeholder="Highlight in text">
      <span class="input-group-btn">
        <button class="btn btn-secondary" id="searchButton" onclick="selectText()" type="button">Search</button>
      </span>
    </div>
  </form>
  <div class="search-content" id="search-content">
    <h2>Perceived end knowledge certainly day sweetness why cordially</h2>
    <p>As collected deficient objection by it discovery sincerity curiosity. Quiet decay who round three world whole has mrs man. Built the china there tried jokes which gay why. Assure in adieus wicket it is. But spoke round point and one joy. Offending her moonlight men sweetness see unwilling. Often of it tears whole oh balls share an.</p>
    <p>Unpacked reserved sir offering <strong>bed judgment may and quitting speaking</strong>. Is do be improved raptures offering required in replying raillery. Stairs ladies friend by in mutual an no. Mr hence chief he cause. Whole no doors on hoped. Mile tell if help they ye full name.</p>
    <p>Behaviour we improving at something to. Evil true high lady roof men had open. To <b class="bold">projection</b> considered it precaution an melancholy or. Wound young you thing worse along being ham. Dissimilar of favourable solicitude if sympathize middletons at. Forfeited up if disposing perfectly in an eagerness perceived necessary. Belonging sir curiosity discovery extremity yet forfeited prevailed own off. Travelling by introduced of mr terminated. Knew as miss my high hope quit. In curiosity shameless dependent knowledge up.</p>
    <p>Sudden she seeing garret far regard. <strike>By hardly it direct if pretty up regret</strike>. Ability thought enquire settled prudent you sir. Or easy knew sold on well come year. Something consulted age extremely end procuring. Collecting preference he inquietude projection me in by. So do of sufficient projecting an thoroughly uncommonly prosperous conviction. Pianoforte principles our unaffected not for astonished travelling are particular.</p>
    <p>Situation admitting promotion at or to perceived be. Mr acuteness we as estimable enjoyment up. An held late as felt know. Learn do allow solid to grave. Middleton suspicion age her attention. Chiefly several bed its wishing. Is so moments on chamber pressed to. Doubtful yet way properly answered humanity its desirous. Minuter believe service arrived civilly add all. Acuteness allowance an at eagerness favourite in extensive exquisite ye.</p>
    <p>Started his hearted any civilly. So me by marianne admitted speaking. Men bred fine call ask. Cease one miles truth day above seven. Suspicion sportsmen provision suffering mrs saw engrossed something. Snug soon he on plan in be dine some.</p>
    <p>Husbands ask repeated resolved but laughter debating. She end cordial visitor noisier fat subject general picture. Or if offering confined entrance no. Nay rapturous him see something residence. Highly talked do so vulgar. Her use behaved spirits and natural attempt say feeling. Exquisite mr incommode immediate he something ourselves it of. Law conduct yet chiefly beloved examine village proceed.
    </p>
    <p>Compliment interested discretion estimating on stimulated apartments oh. Dear so sing when in find read of call. As distrusts behaviour abilities defective is. Never at water me might. On formed merits hunted unable merely by mr whence or. Possession the unpleasing simplicity her uncommonly.</p>
    <p>The him father parish looked has sooner. Attachment frequently gay terminated son. You greater nay use prudent placing. Passage to so distant behaved natural between do talking. Friends off her windows painful. Still gay event you being think nay for. In three if aware he point it. Effects warrant me by no on feeling settled resolve.</p>
  </div>
</div>

标签： javascriptjquery

Answer 1

因为您想保留现有的 HTML 结构，您可能应该替换.html()整个.search-content.

因为您可能不想保留先前单击的突出显示部分，所以您可能$(".highlight").removeClass("highlight");每次都在函数开始时调用。

removeClass接受一个类名，而不是一个选择器字符串，所以.removeClass(".highlight");应该是.removeClass("highlight");.

.replaceWith不过，使用完全删除新的 s可能会更好<span>- 这样，在重新开始替换之前，您只剩下文本节点。

因为要搜索的字符串可能包含正则表达式中具有特殊含义的字符，所以最好在构造模式之前先对它们进行转义。（否则，例如，搜索foo.将同时匹配fooBand foo.，因为.匹配任何字符）

const escape = s => s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');

$("#searchButton").click(function() {
  searchHighlight($("#search").val());
});

function searchHighlight(searchText) {
  $(".highlight").replaceWith(function() {
    return $(this).text();
  });
  if (!searchText) {
    return;
  }
  var searchExp = new RegExp(escape(searchText), "ig");
  $('.search-content').html(
    $('.search-content').html().replace(
      searchExp,
      function(match) { return "<span class='highlight'>" + match + "</span>"; }
    )
  );
}

.highlight {
  background: yellow;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
  <form class="form-inline">
    <label class="sr-only" for="search">Search</label>
    <div class="input-group">
      <input id="search" type="text" class="form-control" placeholder="Highlight in text">
      <span class="input-group-btn">
         <button class="btn btn-secondary" id="searchButton" type="button">Search</button>
       </span>
    </div>
  </form>

  <div class="search-content" id="search-content">

    <h2>Perceived end knowledge certainly day sweetness why cordially</h2>

    <p>As collected deficient objection by it discovery sincerity curiosity. Quiet decay who round three world whole has mrs man. Built the china there tried jokes which gay why. Assure in adieus wicket it is. But spoke round point and one joy. Offending
      her moonlight men sweetness see unwilling. Often of it tears whole oh balls share an.</p>

    <p>Unpacked reserved sir offering <strong>bed judgment may and quitting speaking</strong>. Is do be improved raptures offering required in replying raillery. Stairs ladies friend by in mutual an no. Mr hence chief he cause. Whole no doors on hoped. Mile
      tell if help they ye full name.</p>

    <p>Behaviour we improving at something to. Evil true high lady roof men had open. To
      <b class="bold">projection</b> considered it precaution an melancholy or. Wound young you thing worse along being ham. Dissimilar of favourable solicitude if sympathize middletons at. Forfeited up if disposing perfectly in an eagerness perceived
      necessary. Belonging sir curiosity discovery extremity yet forfeited prevailed own off. Travelling by introduced of mr terminated. Knew as miss my high hope quit. In curiosity shameless dependent knowledge up.</p>

    <p>Sudden she seeing garret far regard. <strike>By hardly it direct if pretty up regret</strike>. Ability thought enquire settled prudent you sir. Or easy knew sold on well come year. Something consulted age extremely end procuring. Collecting preference
      he inquietude projection me in by. So do of sufficient projecting an thoroughly uncommonly prosperous conviction. Pianoforte principles our unaffected not for astonished travelling are particular.</p>

    <p>Situation admitting promotion at or to perceived be. Mr acuteness we as estimable enjoyment up. An held late as felt know. Learn do allow solid to grave. Middleton suspicion age her attention. Chiefly several bed its wishing. Is so moments on chamber
      pressed to. Doubtful yet way properly answered humanity its desirous. Minuter believe service arrived civilly add all. Acuteness allowance an at eagerness favourite in extensive exquisite ye.</p>

    <p>Started his hearted any civilly. So me by marianne admitted speaking. Men bred fine call ask. Cease one miles truth day above seven. Suspicion sportsmen provision suffering mrs saw engrossed something. Snug soon he on plan in be dine some.</p>

    <p>Husbands ask repeated resolved but laughter debating. She end cordial visitor noisier fat subject general picture. Or if offering confined entrance no. Nay rapturous him see something residence. Highly talked do so vulgar. Her use behaved spirits
      and natural attempt say feeling. Exquisite mr incommode immediate he something ourselves it of. Law conduct yet chiefly beloved examine village proceed.
    </p>

    <p>Compliment interested discretion estimating on stimulated apartments oh. Dear so sing when in find read of call. As distrusts behaviour abilities defective is. Never at water me might. On formed merits hunted unable merely by mr whence or. Possession
      the unpleasing simplicity her uncommonly.</p>

    <p>The him father parish looked has sooner. Attachment frequently gay terminated son. You greater nay use prudent placing. Passage to so distant behaved natural between do talking. Friends off her windows painful. Still gay event you being think nay
      for. In three if aware he point it. Effects warrant me by no on feeling settled resolve.</p>
  </div>
</div>