 class="comment">// -> '&lt;div>sale&lt;/div>'</span>

checkpoints<span class="punctuation">.</span><span class="function"><a href="/api/checkpoints/interfaces/checkpoints/checkpoints/methods/movement/gobackward/">goBackward</a></span><span class="punctuation">(</span><span class="punctuation">)</span><span class="punctuation">;</span>
console<span class="punctuation">.</span><span class="function">log</span><span class="punctuation">(</span>app<span class="punctuation">.</span>innerHTML<span class="punctua