Table of Contents
- 1 Should I use px or REM value units in my CSS?
- 2 Should you use REM for media queries?
- 3 Why is em better than PX?
- 4 Which is better EM or REM?
- 5 What are the best media query breakpoints?
- 6 What is VW and VH in CSS?
- 7 What should be the default breakpoint size for media queries?
- 8 What do REM and EM units mean for media queries?
Should I use px or REM value units in my CSS?
I recommend using rem units for fonts, if only because it makes it easier for you, the developer, to change sizes. It’s true that users very rarely change the default font size in their browsers, and that modern browser zoom will scale up px units.
Should you use REM for media queries?
Unit rem in media queries always uses the default font-size in browser settings, and is not affected by font-size of html except for existing bug in WebKit engine (Safari, chrome for iOS, …). So, you should use em instead of rem with media queries before the bug’s fixed.
What unit should I use for media queries?
In addition to em and rem , a popular unit of choice for media queries is the good old pixel. I wondered if it’s possible to use pixel queries nowadays since px-zooming problem that used to exist was now resolved by all browsers.
What’s the difference between px em REM VW and VH?
While PX, EM, and REM are primarily used for font sizing, \%, VW, and VH are mostly used for margins, padding, spacing, and widths/heights. To reiterate, VH stands for “viewport height”, which is the viewable screen’s height. 100VH would represent 100\% of the viewport’s height, or the full height of the screen.
Why is em better than PX?
Pixel is a static measurement, while percent and EM are relative measurements. The size of an EM or percent depends on its parent. If the text size of body is 16 pixels, then 150\% or 1.5 EM will be 24 pixels (1.5 * 16). Look at CSS Units for more measurement units….Body Font Size.
| px | em | percent |
|---|---|---|
| 25px | 1.5625em | 156.25\% |
Which is better EM or REM?
Hope you got a clear difference between the em and the rem units. It is very easy to remember, r in rem indicates root, is relative to the root (HTML) and em is relative to the parent….
| Parameter | em | rem |
|---|---|---|
| Relativity | em is relative to the font-size of its direct or nearest parent | rem is relative to the HTML (root) font-size |
What is EM REM?
rem : a CSS unit which is relative to the font size of the html element. em : a CSS unit which is relative to the font size of the parent element.
What is the advantage of using EMS as a measurement in media queries?
Ems are awesome for making flexible grids and measurements. For example, if a container width is specified in ems, I can proportionally resize the container and its contents in my media queries with one declaration. In this example, resizing the font also resizes its container proportionally.
What are the best media query breakpoints?
What Breakpoints Should You Use?
- 320px — 480px: Mobile devices.
- 481px — 768px: iPads, Tablets.
- 769px — 1024px: Small screens, laptops.
- 1025px — 1200px: Desktops, large screens.
- 1201px and more — Extra large screens, TV.
What is VW and VH in CSS?
vh & vw. vh stands for viewport height and vw is for viewport width. Hence, setting an element to a width value of 50vw means that the element will have a width that’s 50\% of the viewport size, and this stays true when the viewport is resized.
Which is better em or REM?
What is the difference between PX and REM in CSS?
It is recommended to use rem for spacing (margin, padding, etc.) and font size in CSS as it honors user’s preferences and provide better user experience. you can use the following table to convert from px to rem when root font-size is 16px: Use px for fixed size layout (width, height, etc.) or fixed spacing (margin, padding, etc.)
What should be the default breakpoint size for media queries?
The breakpoint should remain at 400px no matter what the user set’s their default font-size to. em and rem, on the other hand, is based on the font-size of the browser. Hence, their media queries should get updated when the user changes their default font-size setting.
What do REM and EM units mean for media queries?
There is, however, one interesting detail about rem and em units when used as units for media queries: they always keep the same value of 1rem = 1em = browser-set font size. The reason for this behavior is explained in the media query spec (emphasis added):
What is the difference between EM and PX based media queries?
If you used em or rem based media queries, your user would see a one-column layout at 650px. This behavior would be consistent with the first two scenarios. If you used px based media queries, your user would see a two-column layout at 650px.