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freeCodeCamp/curriculum/challenges/chinese/03-front-end-libraries/jquery/disable-an-element-using-jquery.md
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Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

Co-authored-by: Crowdin Bot <support+bot@crowdin.com>
Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>
2021-03-05 07:43:24 -08:00

2.9 KiB

id, title, challengeType, forumTopicId, dashedName
id title challengeType forumTopicId dashedName
bad87fee1348bd9aed808826 使用 jQuery 禁用元素 6 17563 disable-an-element-using-jquery

--description--

还能用 jQuery 改变 HTML 标签的非 CSS 属性, 例如:禁用按钮。

当禁用按钮时,它将变成灰色并无法点击。

jQuery 有一个 .prop() 方法,可以用其调整标签的属性。

下面是禁用所有的按钮的代码:

$("button").prop("disabled", true);

禁用 target1 按钮。

--hints--

应该禁用 target1 按钮。

assert(
  $('#target1') &&
    $('#target1').prop('disabled') &&
    code.match(/["']disabled["'],( true|true)/g)
);

不应该禁用其它的按钮。

assert($('#target2') && !$('#target2').prop('disabled'));

应该仅用 jQuery 更改元素属性。

assert(!code.match(/disabled[^<]*>/g));

--seed--

--seed-contents--

<script>
  $(document).ready(function() {
    $("#target1").css("color", "red");

  });
</script>

<!-- Only change code above this line -->

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <h4>#left-well</h4>
      <div class="well" id="left-well">
        <button class="btn btn-default target" id="target1">#target1</button>
        <button class="btn btn-default target" id="target2">#target2</button>
        <button class="btn btn-default target" id="target3">#target3</button>
      </div>
    </div>
    <div class="col-xs-6">
      <h4>#right-well</h4>
      <div class="well" id="right-well">
        <button class="btn btn-default target" id="target4">#target4</button>
        <button class="btn btn-default target" id="target5">#target5</button>
        <button class="btn btn-default target" id="target6">#target6</button>
      </div>
    </div>
  </div>
</div>

--solutions--

<script>
  $(document).ready(function() {
    $("#target1").css("color", "red");
    $("#target1").prop("disabled", true);

  });
</script>

<!-- Only change code above this line -->

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <h4>#left-well</h4>
      <div class="well" id="left-well">
        <button class="btn btn-default target" id="target1">#target1</button>
        <button class="btn btn-default target" id="target2">#target2</button>
        <button class="btn btn-default target" id="target3">#target3</button>
      </div>
    </div>
    <div class="col-xs-6">
      <h4>#right-well</h4>
      <div class="well" id="right-well">
        <button class="btn btn-default target" id="target4">#target4</button>
        <button class="btn btn-default target" id="target5">#target5</button>
        <button class="btn btn-default target" id="target6">#target6</button>
      </div>
    </div>
  </div>
</div>