內容簡介
該外掛會實現及自動化 Zach Leatherman 的「Critical FOFT with preload, with a polyfill fallback emulating font-display: optional」，最佳化和加速網頁字型載入，並透過減少「Flash of Invisible Text」、「Flash of Unstyled Text」和「DOM Reflow」來提高用戶體驗。請參閱https://github.com/zachleat/web-font-loading-recipes#the-compromise-critical-foft-with-preload-with-a-polyfill-fallback-emulating-font-display-optional。
致謝
本外掛基於Hugh Lashbrooke 的起始插件（Starter Plugin），一個可建立符合標準的 WordPress 外掛的堅實且 GPL 授權的程式碼模板。
僅 PRO 版功能
支援 7 種額外的字型粗細
支援小型大寫字母
更精細的預設 CSS 控制
預設選項重置
在插件標籤之間切換前警告使用者尚未儲存的更改
配置
影片教學
第 1 集 簡介和背景
第 2 集 Font Squirrel 產生器（WOFF 和 WOFF2）
產生及上傳字型檔案
您需要為每個網頁字型上傳兩個檔案：一個 WOFF 檔案和一個 WOFF2 檔案。我們建議使用Font Squirrel 的網頁字型產生器來產生這些檔案。強制 Font Squirrel 設置如下:
選擇「專家」
字型格式： 「WOFF」
「WOFF2」
高級選項： 「字型名稱後綴」= -webfont
有關建議設置的詳細設定，請參閱外掛上傳選項畫面。
檔名必須遵循正確的命名規則：$family–$variant-webfont.$filetype。
$family
字型家族的基本名稱，不包含字型樣式。不區分大小寫。可以包含字母、數字和底線，但不包含連字號或空格。
$variant
字型樣式。可以是字重、字體字型或兩者的組合。區分大小寫。
-webfont
必要的字尾。附加至 $variant。
$filetype
檔案類型，即「woff」或「woff2」等。
例如：將 Times New Roman 的粗體斜體樣式重新命名為 timesnewroman-boldItalic-webfont.woff 和 timesnewroman-boldItalic-webfont.woff2。
所允許的字重和字型樣式都與其 CSS 映射相對應：
regular | normal（對應於 400）
italic（對應於 400）
boldItalic（對應於 700）
如需支援小型大寫字母與擴展的字重支援，請升級至WP FOFT Loader PRO。
此外掛支援 1 – 4 個字型家族。例如，您可能會將顯示字型用於標題、為正文使用衬线字型、為 UI 元素（例如導覽標籤）使用無襯線字型，以及在表格數據和代碼示例中使用等寬字型。
子集
上傳最多 4 個小型子集字型。對於每個字型，上傳 WOFF 和 WOFF2 檔案（共多達 8 個檔案）。每個字型將扮演一個佔位符，直到完整的字型載入。
檔名必須遵循正確的命名規則：$family-optimiz
外掛標籤
開發者團隊
原文外掛簡介
This plugin implements and automates Zach Leatherman’s “Critical FOFT with preload, with a polyfill fallback emulating font-display: optional” to optimize and speed up web font loading and improve UX by minimizing Flash of Invisible Text, Flash of Unstyled Text, and DOM Reflow.
Acknowledgement
This plugin is based on Hugh Lashbrooke’s Starter Plugin, a robust and GPL-licensed code template for creating a standards-compliant WordPress plugin.
PRO only features
Support for 7 additional font-weights
Small-caps support
Finer-grained control of default CSS
Default options reset
Warn user of unsaved changes when navigating plugin tabs
Configuration
Video Tutorials
Episode 1. Intro and Background
Episode 2. Font Squirrel Generator (WOFF & WOFF2)
Generating and Uploading the Font Files
Upload two files for each web font: a WOFF file and a WOFF2 file. We recommend you use Font Squirrel’s Webfont Generator to generate the files. Mandatory Font Squirrel settings are:
Select “Expert”
Font Formats: “WOFF”
“WOFF2”
Advanced Options: “Font Name Suffix” = -webfont
For detailed recommended settings, see the plugin Upload options screen.
Filenames must follow the proper naming convention: $family–$variant-webfont.$filetype.
$family
The font family base name without style. Case-insensitive. May contain letters, numerals, and underscores but no hyphens or spaces.
$variant
The font style. Can be weight, style, or a combination of both. Case-sensitive.
-webfont
Mandatory suffix. Append to $variant.
$filetype
The file type, i.e., “woff” or “woff2”.
Example: for the bold weight italic style of Times New Roman, rename the files to timesnewroman-boldItalic-webfont.woff and timesnewroman-boldItalic-webfont.woff2.
Allowed weights and styles and their CSS mappings are:
regular | normal (maps to 400)
italic (maps to 400)
boldItalic (maps to 700)
For small-caps support and extended font-weight support, please upgrade to WP FOFT Loader PRO.
This plugin supports 1 – 4 font families. For example, you might have a display font for headings, a serif-font for body text, a sans-serif font for UI elements, such as navigation labels, and a monospaced font for tabular data and code examples.
Subset
Upload up to 4 small, subsetted fonts. For each font, upload a WOFF & WOFF2 file (for a total of up to 8 files). Each font will act as a placeholder until the full fonts load.
Filenames must follow the proper naming convention: $family-optimized.$filetype.
$family
The font family base name without style. Case-insensitive. May contain letters, numerals, and underscores but no hyphens or spaces. Each $family base name should match the name used for the matching font uploaded on the previous upload screen.
-optimized
Mandatory suffix. Append to $family.
$filetype
The file type, i.e., “woff” or “woff2”.
Example: If you uploaded timesnewroman-regular-webfont.woff and timesnewroman-regular-webfont.woff2 as your body font on the previous screen, name the subsetted versions timesnewroman-optimized.woff and timesnewroman-optimized.woff2 respectively.
To subset and encode your fonts, we recommend you use Font Squirrel’s Webfont Generator. Mandatory Font Squirrel settings are:
Select “Expert”
Font Formats: “WOFF”
“WOFF2”
Fix Missing Glyphs: None
Subsetting: “Custom Subsetting” with the Unicode Ranges 0065-0041-005A,0061-007A
Leave everything else unchecked
OpenType Features: None
OpenType Flattening: None
CSS: Leave unchecked
Advanced Options: “Font Name Suffix” = -optimized
For detailed recommended settings, see the plugin Subset options screen.
CSS
@import rules are automatically handled by this plugin. You may manually inline your font-related CSS in the document
Plugin CSS
The plugin loads some CSS by default. You may disable it from this screen.
Font Display
The plugin uses font-display: swap by default. You can override the font-display property here.
CSS Stage 1
Declarations placed in this field will load subsetted fonts as placeholders while the full fonts load.
Use only the family name followed by Subset (case-sensitive)
Family names must match the names you input on the “Subset” screen.
All declarations must start with the fonts-stage-1 class
See the Documentation screen to view the Stage 1 CSS that this plugin loads by default.
Incorrect:
.nav-primary { // Missing class: .fonts-stage-1
font-family: latoSubset, sans-serif;
}
.fonts-stage-1 #footer-secondary {
font-family: lato, san-serif; // Missing “Subset” suffix
}
.fonts-stage-1 div.callout {
font-family: latoSubset, san-serif;
font-size: 1rem; // “font-family,” “font-weight,” “font-style,”
// and “font-variant” rules only
}
.fonts-stage-1 div.callout {
font-family: latosubset, san-serif; // “Subset” suffix is case-sensitive
}
Correct:
.fonts-stage-1 .nav-primary {
font-family: latoSubset, sans-serif;
}
CSS Stage 2
Use only the family name
Family names must match the file names for the fonts you uploaded on the “Upload” screen.
Omit weights and styles from the font name
All declarations must start with the fonts-stage-2 class
For best performance, please minify your CSS before pasting it into the form.
See the Documentation screen to view the Stage 2 CSS that this plugin loads by default.
Incorrect:
tbody { // Missing class: .fonts-stage-2
font-family: lato, Corbel, "Lucida Grande", sans-serif;
font-weight: 400;
font-style: normal;
}
.fonts-stage-2 span.bolder {
font-family: lato-bold, Corbel, "Lucida Grande", sans-serif; // Don’t include style in font name.
// Better yet, omit declaration altogether.
font-weight: 700;
}
.fonts-stage-2 div.callout {
font-family: lato-regular, Corbel, "Lucida Grande", san-serif;
font-size: 1rem; // “font-family,” “font-weight,” “font-style,”
// and “font-variant” rules only
}
Correct:
.fonts-stage-2 div.callout {
font-family: lato, Corbel, "Lucida Grande", sans-serif;
font-weight: 400;
font-style: normal;
}
.fonts-stage-2 div.callout {
// No need to redeclare the font-family — all weights map to a single family name
font-weight: 700; // This will use the lato-bold font
}
For best performance, please minify your CSS before pasting it into the form.
Font Stacks
Change the default font fallbacks in case your custom fonts don’t load. Don’t include the names of your default custom fonts here.
Further Documentation
See the Documentation screen to view the CSS this plugin loads by default and to view video tutorials.
Translations
English: Default language, always included
Would you like to help translate WP FOFT Loader into your own language? You can do that here!
Dependencies
This plugin includes these third-party libraries in its package.
HTMLPurifier
CSSTidy
Fontawesome
