javascript display text font settings

In web design and development, font selection is a very important issue. Font selection is not only about aesthetics, but also about readability and user experience. Although there are an increasing number of font choices, one of the most common typography traditions used in web pages is the operating system's default font.

However, in some cases, we still need to adjust the font according to specific requirements. In web pages, we can use JavaScript to implement the function of setting text fonts.

The following will introduce several common implementation methods.

1. Using CSS style sheets
   CSS style sheets can be used to set the font, size, color and other style attributes of text. In JavaScript, we can modify the CSS style of an element by calling the style attribute of the document object, as shown below:

document.getElementById("example").style.fontFamily = "Arial";

where example is the id of the selected element, and the fontFamily attribute sets the name of the font for Arial.

2. Using jQuery
   jQuery is a very popular and powerful JavaScript library. Here is a method of using jQuery to set text fonts. First, you need to introduce the jQuery library into HTML:

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>

When using jQuery, you can select elements through the selector, and then use the css() method to add CSS attributes. For example:

$("#example").css("font-family", "Arial");

where #example is the id of the selected element, font-family is the CSS property, and Arial is the font name.

3. Using Web Fonts
   In traditional font selection, limited by the default fonts of the operating system, there are very few font types we can use. Now, with Web fonts, we can use more font types to achieve more free and diverse typography.

Web fonts include two types: operating system-based fonts and custom fonts. Operating system-based fonts require users to install the corresponding fonts locally, while custom fonts can be implemented by introducing font files.

We can use @font-face rules to introduce web fonts and apply them to text in web pages. For example:

@font-face {
  font-family: 'MyFont';
  src: url('fonts/myfont.ttf');
}

body {
  font-family: 'MyFont';
}

where, 'MyFont' is the font name, which needs to be used when referencing it in CSS. The src attribute specifies the font file path.

Summary
In this article, we introduced three ways to use JavaScript to set text fonts: using CSS style sheets, using jQuery, and using web fonts. In actual development, we can choose the best method according to specific needs to achieve better web design.

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