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external_link.js
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external_link.js
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'use strict';
const { isExternalLink } = require('hexo-util');
let EXTERNAL_LINK_SITE_CONFIG;
let EXTERNAL_LINK_SITE_ENABLED = true;
function externalLinkFilter(data) {
if (!EXTERNAL_LINK_SITE_ENABLED) return;
const { config } = this;
if (typeof EXTERNAL_LINK_SITE_CONFIG === 'undefined') {
if (typeof config.external_link === 'undefined' || typeof config.external_link === 'object'
// Deprecated: config.external_link boolean option will be removed in future
|| config.external_link === true) {
EXTERNAL_LINK_SITE_CONFIG = Object.assign({
enable: true,
field: 'site',
exclude: []
}, config.external_link);
}
}
if (config.external_link === false || EXTERNAL_LINK_SITE_CONFIG.enable === false
|| EXTERNAL_LINK_SITE_CONFIG.field !== 'site') {
EXTERNAL_LINK_SITE_ENABLED = false;
return;
}
data = data.replace(/<a([\s]+|[\s]+[^<>]+[\s]+)href=["']([^<>"']+)["'][^<>]*>/gi, (str, _, href) => {
if (/target=/gi.test(str) || !isExternalLink(href, config.url, EXTERNAL_LINK_SITE_CONFIG.exclude)) return str;
if (/rel=/gi.test(str)) {
str = str.replace(/rel="(.*?)"/gi, (relStr, rel) => {
return rel.includes('noopenner') ? relStr : `rel="${rel} noopener"`;
});
return str.replace('href=', 'target="_blank" href=');
}
return str.replace('href=', 'target="_blank" rel="noopener" href=');
});
return data;
}
module.exports = externalLinkFilter;