freeCodeCamp/curriculum/challenges/chinese/03-front-end-development-libraries/jquery/disable-an-element-using-jquery.md

---
id: bad87fee1348bd9aed808826
title: 使用 jQuery 禁用元素
challengeType: 6
forumTopicId: 17563
dashedName: 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：

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

仅禁用 `target1` 按钮。

# --hints--

`target1` 按钮应该被禁用。

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

不应该禁用其它的按钮。

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

应该仅用 jQuery 给元素添加这些 class。

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

# --seed--

## --seed-contents--

```html
<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--

```html
<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>
```