28 lines
768 B
JavaScript
28 lines
768 B
JavaScript
/* global hexo */
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'use strict'
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hexo.extend.filter.register(
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'after_post_render',
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function (data) {
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const theme = hexo.theme.config
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if (!theme.lazyload || !theme.lazyload.enable) return
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data.content = data.content.replace(
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// Match 'img' tags the src attribute.
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/<img([^>]*)src="([^"]*)"([^>\/]*)\/?\s*>/gim,
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function (match, attrBegin, src, attrEnd) {
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let hasAlt = false
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if (!src) return match
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;[attrBegin, attrEnd].forEach(x => { if (x.includes('alt="')) { hasAlt = true } })
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return `<img ${attrBegin}
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lazyload
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${hasAlt ? '' : 'alt="image"'}
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data-src="${src}"
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${attrEnd}
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>`
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}
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)
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},
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1
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)
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