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② 後台搜尋「ReadSpan — Customizable Reading Time Badge & Progress Bar」→ 直接安裝（推薦）
原文外掛簡介
ReadSpan adds two lightweight engagement features to your WordPress site:
Reading Time Badge
A pill-shaped badge that displays estimated reading time, injected before, after, or both sides of post content. Supports three SVG icons (clock, book, stopwatch), custom colors, shapes, padding, and font size. Works via shortcode too.
Scroll Progress Bar
A fixed-position progress bar (top or bottom of the viewport) that fills as the reader scrolls. Supports solid color, gradient, configurable height, and a real-time countdown feature in the badge.
Highlights
Zero JavaScript dependencies — vanilla JS, passive scroll listener with requestAnimationFrame throttle
CSS custom properties for instant style updates
24 configurable settings via a clean 3-tab admin UI with live preview
Mobile hide option (below 768 px)
Dark mode admin UI (prefers-color-scheme: dark)
Shortcode [readspan] support
PHP 7.4 compatible, no Composer required on production
Follows WordPress Coding Standards and DDD architecture
