How can you combine the following arrays using the spread operator?

<span class="jskeywordcolor">const</span> array1 = [<span class="jsnumbercolor">1</span>, <span class="jsnumbercolor">2</span>, <span class="jsnumbercolor">3</span>];
<span class="jskeywordcolor">const</span> array2 = [<span class="jsnumbercolor">4</span>, <span class="jsnumbercolor">5</span>, <span class="jsnumbercolor">6</span>];