<div><div style="top:0px;height:19px;" class="view-line"><span><span class="mtk14">&lt;</span><span class="mtk6">style</span><span class="mtk14">&gt;</span><span class="mtk9">h1</span><span class="mtk3">{</span><span class="mtk10">color</span><span class="mtk3">:</span><span class="mtk12">salmon</span><span class="mtk3">;}</span><span class="mtk9">button</span><span class="mtk3">{</span><span class="mtk10">padding</span><span class="mtk3">:</span><span class="mtk7">10px</span><span class="mtk3">;}</span><span class="mtk14">&lt;/</span><span class="mtk6">style</span><span class="mtk14">&gt;</span></span></div><div style="top: 19px; height: 19px;" class="view-line"><span><span class="mtk1">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="mtk14">&lt;</span><span class="mtk6">section</span><span class="mtk14">&gt;</span></span></div><div style="top: 38px; height: 19px;" class="view-line"><span><span class="mtk1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="mtk14">&lt;</span><span class="mtk6">h1</span><span class="mtk14">&gt;</span><span class="mtk1">Hello&nbsp;world</span><span class="mtk14">&lt;/</span><span class="mtk6">h1</span><span class="mtk14">&gt;</span></span></div><div style="top: 57px; height: 19px;" class="view-line"><span><span class="mtk1">&nbsp;&nbsp;&nbsp;&nbsp;</span><span class="mtk14">&lt;/</span><span class="mtk6">section</span><span class="mtk14">&gt;</span></span></div><div style="top:76px;height:19px;" class="view-line"><span><span class="mtk14">&lt;</span><span class="mtk6">script</span><span class="mtk14">&gt;</span><span class="mtk10">document</span><span class="mtk3">.</span><span class="mtk16">querySelector</span><span class="mtk3">(</span><span class="mtk12">"button"</span><span class="mtk3">).</span><span class="mtk16">addEventListener</span><span class="mtk3">(</span><span class="mtk12">"click"</span><span class="mtk3">,</span><span class="mtk10">event</span><span class="mtk6">=&gt;</span><span class="mtk10">event</span><span class="mtk3">.</span><span class="mtk10">target</span><span class="mtk3">.</span><span class="mtk10">innerText</span><span class="mtk3">=</span><span class="mtk12">"Button&nbsp;clicked!"</span><span class="mtk3">);</span><span class="mtk14">&lt;/</span><span class="mtk6">script</span><span class="mtk14">&gt;</span></span></div></div>