Let's talk about the methods and techniques for setting font size on the Web front-end

Web front-end refers to a technology used in website development, including HTML, CSS, JavaScript, etc. CSS is one of the important technologies used to set website styles, including setting font size. How to set the font size in the web front-end? This article will elaborate on the methods and techniques of setting font size on the web front-end, hoping to be helpful to beginners and website developers.

1. Font size units in CSS

In CSS, there are three font size units: pixels (px), points (pt) and percentages (%). Among them, pixels are the most commonly used unit and are also the main unit for setting font size in the web front-end. Pixel is the smallest display unit on the screen. 1px is equivalent to the size of a small point on the screen. Therefore, the font size in pixel units is fixed and will not change due to different device resolutions.

Point is another commonly used unit. Unlike pixel, point is a unit based on physical size. One point is equal to 1/72 of an inch, so font size in point units is determined by the print size, not the screen. In web front-ends, point units are rarely used and are mainly used in print style sheets.

Percentage calculates font size relative to the size of the parent element, so the font size in percentage units is the ratio relative to the font size of its parent element. For example, if the font size of the parent element is 16px, then when the font size of the child element is 100%, the font size is 16px, and when it is 50%, the font size is 8px.

2. Methods of setting font size

In the Web front-end, there are many ways to set font size, and you can use different methods such as inline styles, internal style sheets, and external style sheets.

1. Inline style

Using inline style to set the font size means using the style attribute in the HTML markup to set the value of the CSS property. For example:

<p style="font-size: 16px;">这是一个段落</p>

Although this method is intuitive and simple, it is not conducive to the maintenance and update of CSS. When the font size needs to be modified, each relevant HTML tag must be modified, which is not conducive to code reuse and expansion. Therefore, this method is not recommended.

2. Internal style sheet

Using an internal style sheet to set the font size means using the