0px'</span> <span class="token comment">// write</span>

foo<span class="token punctuation">.</span>offsetHeight <span class="token comment">// read (recalculate style, layout, expensive!)</span>
bar<span class="token punctuation">.</span>offsetHeight <span class="token comment">// read (fast since style and layout is already known)</span>
baz<span class="token punctuation">.</span>offsetHeight <span class="token comment">// read (fast since style and layout is already known)</span>
<span aria-hidden="true"