d.js</span><pre class="language-javascript line-numbers"><code class="javascript language-javascript"><span class="token keyword">if</span> <span class="token punctuation">(</span>app<span class="token punctuation">.</span>env <span class="token operator">===</span> <span class="token string">'development'</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token comment">// Only import when in development mode</span>
  app<span class="token punctuation">.<