JS: Favicon

// create new icon element let e = document.createElement('LINK') e.setAttribute('rel', 'shortcut icon') e.setAttribute('type', 'image/x-icon') e.setAttribute('sizes', '16x16') e.setAttribute('href', 'https://files.cnblogs.com/files/wipe/favicon.ico') // embedded base64 icon let f = document.createElement('LINK') f.setAttribute('rel', 'icon') f.setAttribute('type', 'image/png') f.setAttribute('sizes', '16x16') f.setAttribute('href', 'data:image/png;base64,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') // remove old icon document.querySelector('link#favicon').remove() // add new icon document.head.appendChild(e) document.head.appendChild(f)