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根据用户输入显示或隐藏div

compare search string html javascript

Yohan · 技术社区 · 6 年前

我想在我的网站上加入一个搜索功能,这样用户就可以在搜索表单中键入一些关键字,并且只显示一些div。我不知道如何比较字符串。这是我的代码:

<h1 class="title">News Journal</h1>

    <input type="text" class="search" placeholder="Search for a subject...">

    <p class="mostViewed">Most visited news websites...</p>

    <div class="divCNN">
    <a target="_blank" href="https://www.cnn.com/"><img src="https://pmcdeadline2.files.wordpress.com/2016/11/cnn-logo-2.jpg?w=892&h=598&crop=1" class="CNN"></a>
    <p class="description">CNN was founded in 1980 by American media proprietor Ted Turner as a 24-hour cable news channel. It was the first all-news television channel in the United States and CNN website has an average of 112 millions unique monthly visitors.<a target="_blank" href="https://www.cnn.com/"> Visit !</a></p>
    </div>

    <div class="divNYT">
    <a target="_blank" href="https://www.nytimes.com/"><img src="https://pmcvariety.files.wordpress.com/2013/08/t_logo_2048_black.png?w=1000&h=563&crop=1" class="NYT"></a>
    <p class="description">The New York Times is an American newspaper based in New York City with worldwide influence and readership. Founded in 1851, the paper has won 125 Pulitzer Prizes, and its website has 95 millions unique monthly visitors.<a target="_blank" href="https://www.nytimes.com/"> Visit !</a></p>
    </div>

    <div class="divYNews">
    <a target="_blank" href="https://www.yahoo.com/news/"><img src="https://pmcdeadline2.files.wordpress.com/2017/05/yahoo-news-logo.jpg?w=446&h=299&crop=1" class="YNews"></a>
    <p class="description">Yahoo! News is a news website that originated as an internet-based news aggregator by Yahoo!. Articles originally came from news services such as Reuters, Fox News, Al Jazeera, USA Today, CNN, BBC News, etc. 93 millions unique monthly visitors.<a target="_blank" href="https://www.yahoo.com/news/"> Visit !</a></p>
    </div>

    <div class="divWPost">
    <a target="_blank" href="https://www.washingtonpost.com/"><img src="http://neatoday.org/wp-content/uploads/2018/02/washington-post-logo.jpg" class="WPost"></a>
    <p class="description">The Washington Post is a major American daily newspaper founded on December 6, 1877. It has a particular emphasis on national politics and its website has 92 millions unique monthly visitors.<a target="_blank" href="https://www.washingtonpost.com/"> Visit !</a></p>
    </div>

<script type="text/javascript">
    function Search() {

    }
    document.addEventListener("keyup", Search);
</script>

比如,如果输入是CNN,函数将。显示()特定的div,而不是其他div。

谢谢你的帮助!

1 回复 | 直到 6 年前

deepak CertainPerformance 6 年前

你可以试着和 href 每种 a 在新闻版面内(并给他们一个容器以便于选择):

const input = document.querySelector('.search');
const newsDivs = document.querySelectorAll('#news-container > div');
input.addEventListener("keyup", () => {
  const str = input.value.toLowerCase().trim();
  newsDivs.forEach(newsDiv => {
    const href = newsDiv.children[0].href;
    newsDiv.style.display = 
      href.includes(str) ? 'block' : 'none';
  });
});

<h1 class="title">News Journal</h1>

<input type="text" class="search" placeholder="Search for a subject...">

<p class="mostViewed">Most visited news websites...</p>


<div id="news-container">
  <div class="divCNN">
    <a target="_blank" href="https://www.cnn.com/"><img src="https://pmcdeadline2.files.wordpress.com/2016/11/cnn-logo-2.jpg?w=892&h=598&crop=1" class="CNN"></a>
    <p class="description">CNN was founded in 1980 by American media proprietor Ted Turner as a 24-hour cable news channel. It was the first all-news television channel in the United States and CNN website has an average of 112 millions unique monthly visitors.<a target="_blank"
        href="https://www.cnn.com/"> Visit !</a></p>
  </div>

  <div class="divNYT">
    <a target="_blank" href="https://www.nytimes.com/"><img src="https://pmcvariety.files.wordpress.com/2013/08/t_logo_2048_black.png?w=1000&h=563&crop=1" class="NYT"></a>
    <p class="description">The New York Times is an American newspaper based in New York City with worldwide influence and readership. Founded in 1851, the paper has won 125 Pulitzer Prizes, and its website has 95 millions unique monthly visitors.<a target="_blank" href="https://www.nytimes.com/"> Visit !</a></p>
  </div>

  <div class="divYNews">
    <a target="_blank" href="https://www.yahoo.com/news/"><img src="https://pmcdeadline2.files.wordpress.com/2017/05/yahoo-news-logo.jpg?w=446&h=299&crop=1" class="YNews"></a>
    <p class="description">Yahoo! News is a news website that originated as an internet-based news aggregator by Yahoo!. Articles originally came from news services such as Reuters, Fox News, Al Jazeera, USA Today, CNN, BBC News, etc. 93 millions unique monthly visitors.
      <a
        target="_blank" href="https://www.yahoo.com/news/"> Visit !</a>
    </p>
  </div>

  <div class="divWPost">
    <a target="_blank" href="https://www.washingtonpost.com/"><img src="http://neatoday.org/wp-content/uploads/2018/02/washington-post-logo.jpg" class="WPost"></a>
    <p class="description">The Washington Post is a major American daily newspaper founded on December 6, 1877. It has a particular emphasis on national politics and its website has 92 millions unique monthly visitors.<a target="_blank" href="https://www.washingtonpost.com/"> Visit !</a></p>
  </div>
</div>