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- em is a CSS unit relative to the font size of the parent element, while rem is a CSS unit relative to the font size of an html element. Both of these are scalable units, meaning they give us the ability to scale elements up and down, relative to a set value.
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What is the difference between EM and REM values?
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- Background Information
- Length Values
- What Are em and Rem and Why Use them?
- Em vs. Rem
- Problems with Working with em and Rem
- Scaling Sizing with em and Rem
- CSS Libraries Using em and Rem
- Conclusion
CSS syntax is rather simple, and, as we discussed previously, involves assigning values to properties of HTML elements. The property-value pair is referred to as a CSS declaration. Consider the code below: This code shows a CSS declaration that styles the h1 element of a webpage by assigning specific values to some properties of the element. We see...
Length values are CSS data types assigned to CSS properties, such as weight, height, margin, padding, and font-size. Length values are either absolute or relative. Absolute length values are fixed units, such as px. They are not relative or dependent on anything. Relative length values, however, are not fixed. They are relative to something else, l...
em is a CSS unit relative to the font size of the parent element, while rem is a CSS unit relative to the font size of an htmlelement. Both of these are scalable units, meaning they give us the ability to scale elements up and down, relative to a set value. This adds more flexibility to our designs and makes our sites more responsive. A key reason ...
em and remare similar because they are both scalable units. Their values are always relative to the value of something else. Most notably, em and rem differ in the way the browser converts them to px. As mentioned before, em values are relative to the font-size of the nearest parent element, while rem values are relative to the root font-size, or t...
As mentioned above, when using rem it is sometimes difficult for all the modules to scale up and down accurately. A proposed alternative is to use em, since components within a module are more likely to accurately scale up and down relative to the parent component. Thus, all the sidebar components would scale relative to the parent sidebar element,...
Creating common decimal property values with em and rem used to be a difficult problem because the math is typically difficult to calculate. The following are some common font sizes and their corresponding rem values: However, there have been different approaches to resolving this. The “62.5 percent” technique is a popular one; it involves setting ...
In contrast to em, remappears to be more common in CSS libraries. Popular libraries that make use of rem include: 1. Bootstrap v5 2. Tailwind CSS 3. React MUI (Including inbuilt support for the 62.5 percent technique) 4. Bulma Furthermore, the Google Material design style guide also recommends the remunit for its web implementations.
In this article, we learned about em and rem, two similar, scalable, and relative CSS units. However, the key difference between them lies in how browsers compute their pixel values. While both these units provide the needed flexibility for a responsive design, rem is favored for its simplicity, consistency, and predictability. And although emcan b...
CSS Units. CSS has several different units for expressing a length. Many CSS properties take "length" values, such as width, margin, padding, font-size, etc. Length is a number followed by a length unit, such as 10px, 2em, etc.
Jul 21, 2015 · The difference between em and rem units is how the browser determines the px value they translate into. Understanding this difference is the key to determining when to use each unit. We’re going to begin by going over how rem and em units work from the ground up to make sure you know every detail.
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Jan 25, 2024 · CSS units allow you to measure and specify different property values. You use them to modify CSS properties such as margins, padding, height, and width to make them compatible with devices of all screen sizes. CSS units have two basic types: * Absolute units * Relative units Absolute
Mar 22, 2018 · By consistently using ems, you can design components on the page that respond automatically should the font size change. Then, with a clever trick for a responsive font size, you can produce an entire page that adjusts dynamically based on the viewport width of the browser.
