如何使用jQuery选择具有自定义类名的元素

Question

我想用jQuery选择一个textarea元素，其类名为sendMessage：

<script>tinymce.init({ selector:'textarea' });</script>

那么如何将这个特定元素的classname添加到这行代码中呢？

Answer 1

类选择器由点（。）表示，如下所示

debian:~/user$ curl -Ss -H "Authorization: Bearer atkn" https://api.spotify.com/v1/users/bugenwilla/playlists|jq -r '.items[]|select(.name=="myplaylist")|[.tracks.total, .id]'
[
  1543,
  "playlistid"
]

debian:~/user$ curl -Ss -H "Authorization: Bearer atkn" https://api.spotify.com/v1/users/username/playlists/playlistid/tracks | jq -r '.items[] | .track.album.artists[].name' | wc -l
108

debian:~/user$ curl -Ss -H "Authorization: Bearer atkn" https://api.spotify.com/v1/users/username/playlists/playlistid/tracks | jq -r '.limit, .total'
100
1543

Answer 2

<强> Working fiddle

你可以简单地使用类符号（点）.，它看起来像：

tinymce.init({ selector:'.sendMessage ' });
//or
tinymce.init({ selector:'textarea.sendMessage ' });

段：

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tinymce.init({
  selector: "textarea.sendMessage"
});

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<script src="//cdn.tinymce.com/4/tinymce.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea class="sendMessage">Congratulations!</textarea>

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