Comparing `height: calc(100vh);` to `height: 100vh;` in CSS can reveal a few

Currently tackling a project where the previous developer utilized:

.main-sidebar {
    height: calc(100vh);
}

Unfortunately, I can no longer reach out to them, and I am curious about the variance (if any) between the two approaches.

(Am I in the appropriate location to pose this inquiry?)

Answer №1

VH
height: 100vh; refers to the height of this element being equivalent to 100% of the viewport height.

For example: height: 50vh;
If your screen height is 1000px, the height of your element will be 500px (50% of 1000px).

CALC
height: calc(100% - 100px); calculates the size of the element by subtracting a specified value.

For instance:
height: calc(100% - 100px); If your screen height is 1000px, the height of your element will be 900px (100% of 1000px minus 100px).

*It seems unnecessary for the previous developer to use calc() if there was no need for such calculations.

Answer №2

It remains constant because when the expression calc(100vh) is evaluated, it consistently results in 100vh.

Answer №3

calc() function is specifically designed to compute the value inside the parentheses.

For instance, consider a scenario where the height is defined as follows: calc(100vh - 60px);

In this case, the height will be reduced by 60 pixels compared to the viewport height.

It is essential to remember to include spaces before and after operators when using the calc() function.

Answer №4

Utilizing the calc() CSS function allows for dynamic calculations to be included within CSS property values.

If you would like to explore further, you can visit this Link

(The previous developer may have employed this method consistently for ease of adding calculations later on)

Answer №5

One typical scenario involves him beginning by removing the header or another element, resulting in a calculation of (100vh - 80px).

Answer №6

The calc() function is quite versatile, allowing for mathematical expressions involving addition (+), subtraction (-), multiplication (*), and division (/) to be utilized as component values.

However, in this specific scenario, both options are identical since no calculation has been applied. Therefore, you can simply use height: 100vh

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