="token string">'Kauai'</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
islands<span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span><span class="token string">'Oahu'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">//=> TypeError: Object Oahu,Kauai has no method 'includes'</span>

<span class="token comment">// Convert `islands` to an