Add parseCookie and serializeCookie

snippets/parseCookie.md

@@ -0,0 +1,16 @@
+### parseCookie
+
+Parse an HTTP Cookie header string and return an object of all cookie name-value pairs.
+
+Use `String.split(';')` to separate key-value pairs from each other.
+Use `Array.map()` and `String.split('=')` to separate keys from values in each pair.
+Use `Array.reduce()` and `decodeURIComponent()` to create an object with all key-value pairs.
+
+```js
+const parseCookie = str =>
+  str.split(';').map(v => v.split('=')).reduce((acc,v) => {acc[decodeURIComponent(v[0].trim())] = decodeURIComponent(v[1].trim()); return acc},{});
+```
+
+```js
+parseCookie('foo=bar; equation=E%3Dmc%5E2'); // { foo: 'bar', equation: 'E=mc^2' }
+```

snippets/serializeCookie.md

@@ -0,0 +1,13 @@
+### serializeCookie
+
+Serialize a cookie name-value pair into a Set-Cookie header string.
+
+Use template literals and `encodeURIComponent()` to create the appropriate string.
+
+```js
+const serializeCookie = (name, val) => `${encodeURIComponent(name)}=${encodeURIComponent(val)}`;
+```
+
+```js
+serializeCookie('foo', 'bar'); // 'foo=bar'
+```

tag_database

@@ -125,6 +125,7 @@ once:function
 onUserInputChange:browser,event,advanced
 orderBy:object,array
 palindrome:string
+parseCookie:utility,string
 partition:array,object,function
 percentile:math
 pick:array
@@ -154,6 +155,7 @@ sampleSize:array,random
 scrollToTop:browser
 sdbm:math,utility
 select:object
+serializeCookie:utility,string
 setStyle:browser
 shallowClone:object
 show:browser,css