How to change font in javascript-Front-end Q&A-php.cn

How to change font in javascript

王林

Release： 2023-05-27 10:48:07

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First of all, JavaScript is a scripting language mainly used for web development and programming of interactive applications. In web development, JavaScript can change the style of web elements, including fonts, by manipulating the DOM (Document Object Model).

Let’s take a look at how to use JavaScript to change the font.

Method 1: Change fonts through CSS styles

In web pages, we can define different fonts through CSS style sheets, and then use JavaScript to change the style of elements to change the fonts.

1. First, add a CSS style sheet to the head of the HTML document:

<head>
  <style>
    .my-text {
      font-family: 'Arial', sans-serif;
      font-size: 16px;
    }
  </style>
</head>

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2. Then, select the element whose font you want to change in JavaScript and modify its class attribute.

var ele = document.getElementById('my-text');
ele.className = 'my-text';

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This way you can set the font of the element to Arial font and the size to 16px.

Method 2: Directly change the style of the element

In addition to setting the font through the CSS style sheet, you can also directly modify the style of the element through JavaScript.

1. First, select the element you want to modify.

var ele = document.getElementById('my-text');

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2. Then, use the style attribute to set the font style.

ele.style.fontFamily = 'Arial, sans-serif';
ele.style.fontSize = '16px';

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This way you can set the font of the element to Arial font and the size to 16px.

It should be noted that when setting the element style directly, use camel case naming rules, such as fontSize instead of font-size.

In summary, using JavaScript to change fonts can be achieved through CSS style sheets or directly modifying element styles. In practical applications, it is necessary to choose the appropriate method to operate according to the specific situation.

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