▼2番目のボタン(button要素)のdisabled属性に「disabled"」を設定します。
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<h1>DOM要素の属性(Attirbutes):属性(Attr):attr(key, value)の使用例 | jQuery</h1>
<p>▼2番目のボタン(button要素)のdisabled属性に「disabled"」を設定します。</p>
<!-- CODE -->
<p>
<button>0番目のボタン</button>
<button>1番目のボタン</button>
<button>2番目のボタン</button>
</p>
<!-- CODE / -->
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