'use strict' hexo.extend.filter.register( 'after_post_render', function (data) { const theme = hexo.theme.config; if (!theme.lazyload || !theme.lazyload.enable) return; data.content = data.content.replace( // Match 'img' tags width the src attribute. /<img([^>]*)src="([^"]*)"([^>]*)>/gim, function (match, attrBegin, src, attrEnd) { // Exit if the src doesn't exists. if (!src) return match; return `<img ${attrBegin} lazyload src="/images/loading.svg" data-src="${src}" ${attrEnd} >` } ) }, 1 );