FAQ: CSS Grid Essentials - Grid Column

This community-built FAQ covers the “Grid Column” exercise from the lesson “CSS Grid Essentials”.

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FAQs on the exercise Grid Column

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why do we use .b to set class=“box b” not .box b


A space in the class attribute means that each word is a seperate class.

Therefore, the element with class box b has both the box class and the b class, not a single class named box b.

Therefore, with .b, it is saying to apply the style to all elements with the b class. If you were to apply to elements matching .box b, it would apply to all bold text (<b> inside elements with the box class.

If you wanted to match an element with both the box and b classes, you would do: .box.b.

I hope that makes sense!


Instruction #3

“Let’s also make box b take up a few rows. Use grid-row with span to make the item take up rows two through four.”

Answer: grid-row: 2 / span 3;

Why is the “span 3” and not “span 4”?

It confuses me because it ask’s to take up rows two through FOUR.

1 Like

Because span 3 will make it span 3 rows, so starting with row 2, count: Row2, Row3, Row4.

If we used span 4, it will make it go one farther then we want, to row 5.


If anyone is having a hard time conceptualizing this, I recommend using graph paper and drawing out the same dimensions as the grid in the exercise.

I am sorry, I am confused. Please help
Instruction 2

Let’s make box b take up six columns. In style.css , create a rule for elements of class b . Use grid-column to set its starting column to 2 . Use span to make the item take up six columns.

Answer : Grid-column 2 / span 6

My understanding :- we starting from column 2 …I l start counting from column 2 + 3 + 4 + 5 + 6… so total 5 columns

Why is it “span 6” and not “span 5 ” ?

I think it’s because they are asking for you to create an item that covers 6 columns, not 5. From what I understand, “span #” refers to the number of rows/columns spanned across. What you interpreted was probably that the item covers up to column 6, which isn’t the same as spanning 6 columns. If we were to rewrite the code without using span, the code should say:
grid-column: 2 / 8;
In this case, the item will start at column 2 and end in column 7, just right before column 8 starts. This item will span 6 columns. Hope this helps!