What would this css selector select?

Question

[class*="col-"]
What would this select?

Answer 1

It'll select all those elements whose class attribute is set to value that contains "col-"

for example if you have markup as follows :
<div class="col-1"></div>
<div class="col-2"></div>
<span class="col-1-1"></span>
<span class="col-1-2"></span>
even this
<div class="my-col-1"></div>

all these element will be selected as they satisfy given criteria(i.e containing "col-" in value of class attribute)

for details check:

https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors