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font-loader-observer

v1.0.3

Published

Detect font download status and corresponding hooks

Downloads

168

Readme

安装

npm install font-loader-observer

使用

  1. isSupportFontDisplay() 检测浏览器是否支持 font-display CSS 属性。如果支持可以直接使用原生 CSS 控制字体加载模式

  2. watchFontLoaded(String fontFamily, Object options) 如果不支持 font-display,则监听字体加载状态

  • fontFamily: 一个字符串,要检测的字体名称
  • options: 可选项,支持参数:
    • callback: 字体加载完成的回调函数
    • failed: 字体加载失败的回调函数
    • timeout: 字体加载超时时间,单位秒。默认3000
    • defaultFont: 字体加载完成之前的默认字体
    • referText: 检测字体加载状态所用的字符串。默认是 "!"\#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~"
import {isSupportFontDisplay, watchFontLoaded} from 'font-loader-observer'

if (!isSupportFontDisplay()) {
    document.body.classList.add('font_loading');

    watchFontLoaded('test-font', {
        callback: function() {
            console.log('字体加载完成。Font loaded')
            document.body.classList.remove('font_loading');
        },
        defaultFont: 'sans-serif',
    })
} else {
    console.log('This environment supports the font-display property, and font-display can be used to set the font loading behavior directly')
}

示例

github | npm | 掘金:原理介绍