動(dòng)畫多讀/少讀，略帶透露

Question 1

我正在嘗試實(shí)現(xiàn)一個(gè)按鈕，用簡單的動(dòng)畫來顯示/隱藏更多的內(nèi)容。到目前為止，我已經(jīng)通過StackOverflow進(jìn)行了搜索，但我似乎還不知道如何使它更具動(dòng)態(tài)性，以便在不重復(fù)代碼的情況下可以在同一頁上的多個(gè)項(xiàng)目上使用它。

我試著打開按鈕功能來使用jQuery（這個(gè)），。。。但在卷軸的高度上遇到了問題。

Question 2

將每個(gè)重復(fù)模塊包裝到父容器中。然后您可以在這些容器上循環(huán)，并隔離存在于該容器實(shí)例中的按鈕和內(nèi)容的實(shí)例。

在下面的each循環(huán)中，惟一的更改是對(duì)卡片主體和按鈕使用jQuery(this).find(selector)。其他一切都沒變

var defaultHeight = 50; // height when "closed"

jQuery('section').each(function() {

  var text = jQuery(this).find(".card-body");
  var textHeight = text[0].scrollHeight; // the real height of the element
  var button = jQuery(this).find(".card-readmore");

  text.css({
    "max-height": defaultHeight,
    "overflow": "hidden"
  });

  button.on("click", function() {
    var newHeight = 0;
    if (text.hasClass("active")) {
      newHeight = defaultHeight;
      text.removeClass("active");
    } else {
      newHeight = textHeight;
      text.addClass("active");
    }
    text.animate({
      "max-height": newHeight
    }, 500);
  });

});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<section>
  <div class="card-body">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc luctus lacus dolor, in sagittis massa ultrices ut. Duis tristique, metus vel sollicitudin eleifend, purus est pellentesque justo, id molestie ipsum lectus at nisl. Donec et mi sit amet
      nunc sodales porta in sed nunc. Integer sagittis, libero vitae sodales egestas, purus mauris luctus enim, ut egestas nisi nisl vitae dui. Nullam ornare, risus et aliquet posuere, odio turpis iaculis lorem, id ornare diam felis nec leo. Nam lobortis
      vestibulum purus eget bibendum. Phasellus malesuada nunc ut nisl ullamcorper, in ullamcorper diam elementum.</p>
    <p>In hac habitasse platea dictumst. Integer vitae semper augue. Interdum et malesuada fames ac ante ipsum primis in faucibus. Sed dapibus lorem leo, sit amet placerat lorem iaculis eu. Praesent euismod nulla nec odio varius faucibus. Proin lobortis
      felis porttitor dui malesuada, vitae imperdiet nisl convallis. Vivamus in diam eu felis eleifend fermentum.</p>
  </div>
  <p class="card-readmore">Read more</p>
</section>
<section>
  <div class="card-body">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc luctus lacus dolor, in sagittis massa ultrices ut. Duis tristique, metus vel sollicitudin eleifend, purus est pellentesque justo, id molestie ipsum lectus at nisl. Donec et mi sit amet
      nunc sodales porta in sed nunc. Integer sagittis, libero vitae sodales egestas, purus mauris luctus enim, ut egestas nisi nisl vitae dui. Nullam ornare, risus et aliquet posuere, odio turpis iaculis lorem, id ornare diam felis nec leo. Nam lobortis
      vestibulum purus eget bibendum. Phasellus malesuada nunc ut nisl ullamcorper, in ullamcorper diam elementum.</p>
    <p>In hac habitasse platea dictumst. Integer vitae semper augue. Interdum et malesuada fames ac ante ipsum primis in faucibus. Sed dapibus lorem leo, sit amet placerat lorem iaculis eu. Praesent euismod nulla nec odio varius faucibus. Proin lobortis
      felis porttitor dui malesuada, vitae imperdiet nisl convallis. Vivamus in diam eu felis eleifend fermentum.</p>
  </div>
  <p class="card-readmore">Read more</p>
</section>

Answer 1

將每個(gè)重復(fù)模塊包裝到父容器中。然后您可以在這些容器上循環(huán)，并隔離存在于該容器實(shí)例中的按鈕和內(nèi)容的實(shí)例。

在下面的each循環(huán)中，惟一的更改是對(duì)卡片主體和按鈕使用jQuery(this).find(selector)。其他一切都沒變

var defaultHeight = 50; // height when "closed"

jQuery('section').each(function() {

  var text = jQuery(this).find(".card-body");
  var textHeight = text[0].scrollHeight; // the real height of the element
  var button = jQuery(this).find(".card-readmore");

  text.css({
    "max-height": defaultHeight,
    "overflow": "hidden"
  });

  button.on("click", function() {
    var newHeight = 0;
    if (text.hasClass("active")) {
      newHeight = defaultHeight;
      text.removeClass("active");
    } else {
      newHeight = textHeight;
      text.addClass("active");
    }
    text.animate({
      "max-height": newHeight
    }, 500);
  });

});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<section>
  <div class="card-body">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc luctus lacus dolor, in sagittis massa ultrices ut. Duis tristique, metus vel sollicitudin eleifend, purus est pellentesque justo, id molestie ipsum lectus at nisl. Donec et mi sit amet
      nunc sodales porta in sed nunc. Integer sagittis, libero vitae sodales egestas, purus mauris luctus enim, ut egestas nisi nisl vitae dui. Nullam ornare, risus et aliquet posuere, odio turpis iaculis lorem, id ornare diam felis nec leo. Nam lobortis
      vestibulum purus eget bibendum. Phasellus malesuada nunc ut nisl ullamcorper, in ullamcorper diam elementum.</p>
    <p>In hac habitasse platea dictumst. Integer vitae semper augue. Interdum et malesuada fames ac ante ipsum primis in faucibus. Sed dapibus lorem leo, sit amet placerat lorem iaculis eu. Praesent euismod nulla nec odio varius faucibus. Proin lobortis
      felis porttitor dui malesuada, vitae imperdiet nisl convallis. Vivamus in diam eu felis eleifend fermentum.</p>
  </div>
  <p class="card-readmore">Read more</p>
</section>
<section>
  <div class="card-body">
    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc luctus lacus dolor, in sagittis massa ultrices ut. Duis tristique, metus vel sollicitudin eleifend, purus est pellentesque justo, id molestie ipsum lectus at nisl. Donec et mi sit amet
      nunc sodales porta in sed nunc. Integer sagittis, libero vitae sodales egestas, purus mauris luctus enim, ut egestas nisi nisl vitae dui. Nullam ornare, risus et aliquet posuere, odio turpis iaculis lorem, id ornare diam felis nec leo. Nam lobortis
      vestibulum purus eget bibendum. Phasellus malesuada nunc ut nisl ullamcorper, in ullamcorper diam elementum.</p>
    <p>In hac habitasse platea dictumst. Integer vitae semper augue. Interdum et malesuada fames ac ante ipsum primis in faucibus. Sed dapibus lorem leo, sit amet placerat lorem iaculis eu. Praesent euismod nulla nec odio varius faucibus. Proin lobortis
      felis porttitor dui malesuada, vitae imperdiet nisl convallis. Vivamus in diam eu felis eleifend fermentum.</p>
  </div>
  <p class="card-readmore">Read more</p>
</section>

動(dòng)畫多讀/少讀，略帶透露

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