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Refactor JSONCookie function for clarity and compliance #120

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Refactor JSONCookie function for clarity and compliance #120

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6 changes: 3 additions & 3 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -76,18 +76,18 @@ function cookieParser (secret, options) {
* Parse JSON cookie string.
*
* @param {String} str
* @return {Object} Parsed object or undefined if not json cookie
* @return {Object|undefined} Parsed object or undefined if not json cookie
* @public
*/

function JSONCookie (str) {
if (typeof str !== 'string' || str.substr(0, 2) !== 'j:') {
if (typeof str !== 'string' || !str.startsWith('j:')) {
return undefined
}

try {
return JSON.parse(str.slice(2))
} catch (err) {
} catch {
return undefined
}
}
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