What does rem mean in js

REM in CSS is a relative unit relative to the font size of the root element (html). It has the following characteristics: relative to the root element font size, not affected by the parent element. When the root element's font size changes, elements using REM will adjust accordingly. Can be used with any CSS property. Advantages of using REM include: Responsiveness: Keep text readable on different devices and screen sizes. Consistency: Make sure font sizes are consistent throughout your website. Scalability: Easily change the global font size by adjusting the root element font size.

What is REM in CSS

In CSS, REM is a relative unit, representing relative to The font size of the root element (html element).

Characteristics of REM

REM has the following characteristics:

• Relative to the font size of the root element, it is not affected by the font size of the parent element .
• When the font size of the root element changes, all elements using REM will also change size accordingly.
• can be used in any CSS property.

Advantages of using REM

Using REM has the following advantages:

• Responsiveness: Because REM's font size is relative to the root element, it allows for responsive design that keeps text readable on different devices or screen sizes.
• Consistency: REM ensures that font sizes remain consistent throughout your website, no matter which page or device it is viewed on.
• Scalability: When you need to change the global font size, you only need to adjust the font size of the root element, and all elements using REM will be automatically resized.

Usage of REM

To use REM, just add the "rem" unit after the font size value. For example:

<code class="css">html {
  font-size: 16px;
}

body {
  font-size: 1.5rem;
}</code>

In the above example, the font size of the html element is set to 16px, while the font size of the body element is set to 1.5rem, which means that the font size of the body element is 1.5 of the font size of the root element. times, that is 24px (16px * 1.5).

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