<p dir="auto">Setting up <a href="https://github.com/SphinxKnight/Twitter-Assistant">https://github.com/SphinxKnight/Twitter-Assistant</a>, at the <code class="notranslate">npm run build</code>, a TS1005 error was thrown. This is due to the signature of the <code class="notranslate">isArray</code> method in <code class="notranslate">lib.es6.d.ts</code> which is incorrect.</p>
<p dir="auto">This typo also occurs in signatures for <code class="notranslate">isView</code> with <code class="notranslate">ArrayBuffer</code>.</p>
<p dir="auto">Note: This wasn't detected by running the tests.</p>
<p dir="auto">This interface contains:<br>
isArray(arg: any): arg is Array;<br>
but I think it should be:<br>
isArray(arg: any): boolean;</p>
<p dir="auto">It doesn't compile as it is.</p>