k-name-lengths.js">
<div class="highlight"><pre><span></span><code><span class="kd">const</span><span class="w"> </span><span class="nx">ast</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nx">acorn</span><span class="p">.</span><span class="nx">parse</span><span class="p">(</span><span class="nx">program</span><span class="p">,</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="nx">locations</span><span class="o">:</span><sp