Some important CSS property for uses in your responsive bootstrap 4 pages

How do you change the direction of flex in CSS?

The flex-direction property accepts 4 different values:

row (default)same as text direction.
row-reverseopposite to text direction.
columnsame as row but top to bottom.
column-reversesame as row-reverse top to bottom.

What are the background properties?

All CSS Background Properties
Property Description

background-imageSets the background image for an element
background-originSpecifies where the background image(s) is/are positioned
background-positionSets the starting position of a background image
background-repeatSets how a background image will be repeated

How do you change position in CSS?

You can use two values top and left along with the position property to move an HTML element anywhere in the HTML document.

Move LeftUse a negative value for left.
Move RightUse a positive value for left.
Move UpUse a negative value for top
Move DownUse a positive value for top.

What is Z-index in CSS?

The z-index CSS property sets the z-order of a positioned element and its descendants or flex items. Overlapping elements with a larger z-index cover those with a smaller one.
If you want to create a custom stacking order, you can use the z-index property on a positioned element. The z-index property can be specified with an integer value (positive, zero, or negative), which represents the position of the element along the z-axis.

How do I fix Z-index in CSS?

To sum up, most issues with z-index can be solved by following these two guidelines:
Check that the elements have their position set and z-index numbers in the correct order.
Make sure that you don’t have parent elements limiting the z-index level of their children.

How do you use sticky position in CSS?

CSS Demo: position

To see the effect of sticky positioning, select the position: sticky option and scroll this container. The element will scroll along with its container, until it is at the top of the container (or reaches the offset specified in top ), and will then stop scrolling, so it stays visible.

How do you flex vertically?

Vertical alignment using align-self

flex-startalign to the top of the container.
flex-endalign to the bottom of the container.
centeralign at the vertical center of the container.
baselinedisplay at the baseline of the container.
stretchitems are stretched to fit the container.
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