Bootstrap
<p class="font-weight-bold">Bold text.</p>
Alberto Arrojo
<p class="font-weight-bold">Bold text.</p><p class="fw-bold">Bold text.</p>
<p class="fw-bolder">Bolder weight text (relative to the parent element).</p>
<p class="fw-normal">Normal weight text.</p>
<p class="fw-light">Light weight text.</p>
<p class="fw-lighter">Lighter weight text (relative to the parent element).</p>
<p class="fst-italic">Italic text.</p>
<p class="fst-normal">Text with normal font style</p><p class="fw-bold">Bold text.</p><p class="font-weight-bold">Bold text.</p>