Function init

docs/javascripts/readingProgress.js:138–149

()

    // 初始化
    function init() {
        createProgressRing();
        const throttledUpdate = throttle(updateProgress, 100);
        const throttledResize = throttle(() => {
            updateCircleSize();
            updateProgress();
        }, 200);

        window.addEventListener('scroll', throttledUpdate, { passive: true });
        window.addEventListener('resize', throttledResize, { passive: true });
        updateProgress();
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);