Question

Is it bad practice to style an element using its id or should I be style every element referencing the appropriate css ?

<div id="test">
</div>

versus :

<div id="test" class="testClass">
</div>

---

#test{
color:blue;
}

.testClass {
color:blue
}

Answer 1

It’s not a bad or good practice. The purpose of the id selector differs from class.

If you’re planning to style this one element only and not re-use the styles anywhere else – id is you choice. If you need a lot of similar div-s to have the same style – use class