diff --git a/snippets/CSVToArray.md b/snippets/CSVToArray.md
index 65ea903cd..d2803a59f 100644
--- a/snippets/CSVToArray.md
+++ b/snippets/CSVToArray.md
@@ -2,6 +2,7 @@
 title: CSV to array
 tags: string,array
 expertise: intermediate
+cover: blog_images/keyboard-tea.jpg
 firstSeen: 2018-06-27T20:57:54+03:00
 lastUpdated: 2022-01-30T12:14:39+02:00
 ---
diff --git a/snippets/CSVToJSON.md b/snippets/CSVToJSON.md
index 8918dc7ed..d705fdb07 100644
--- a/snippets/CSVToJSON.md
+++ b/snippets/CSVToJSON.md
@@ -2,6 +2,7 @@
 title: CSV to JSON
 tags: string,object
 expertise: advanced
+cover: blog_images/kettle-laptop.jpg
 firstSeen: 2018-06-27T21:14:24+03:00
 lastUpdated: 2022-01-30T12:14:39+02:00
 ---
diff --git a/snippets/RGBToHSB.md b/snippets/RGBToHSB.md
index c4dd164ce..21f80e0d7 100644
--- a/snippets/RGBToHSB.md
+++ b/snippets/RGBToHSB.md
@@ -2,6 +2,7 @@
 title: RGB to HSB
 tags: math
 expertise: intermediate
+cover: blog_images/dark-leaves.jpg
 firstSeen: 2020-09-18T14:25:07+03:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/RGBToHex.md b/snippets/RGBToHex.md
index 9e259e2e3..e3091b1f9 100644
--- a/snippets/RGBToHex.md
+++ b/snippets/RGBToHex.md
@@ -2,6 +2,7 @@
 title: RGB to hex
 tags: string,math
 expertise: intermediate
+cover: blog_images/colors-mural.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-11-03T22:11:18+02:00
 ---
diff --git a/snippets/addEventListenerAll.md b/snippets/addEventListenerAll.md
index 77e7183fe..28f35d7a2 100644
--- a/snippets/addEventListenerAll.md
+++ b/snippets/addEventListenerAll.md
@@ -3,6 +3,7 @@ title: Add event listener to all targets
 tags: browser,event
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/red-mountain.jpg
 firstSeen: 2021-04-22T08:53:29+03:00
 lastUpdated: 2021-04-22T08:53:29+03:00
 ---
diff --git a/snippets/aperture.md b/snippets/aperture.md
index 069d7b817..8b4a54e75 100644
--- a/snippets/aperture.md
+++ b/snippets/aperture.md
@@ -3,6 +3,7 @@ title: Consecutive element subarrays
 tags: array
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/camera-zoom.jpg
 firstSeen: 2020-05-13T13:25:33+03:00
 lastUpdated: 2020-10-18T20:24:28+03:00
 ---
diff --git a/snippets/arrayToHTMLList.md b/snippets/arrayToHTMLList.md
index af0e67150..2070ffcd0 100644
--- a/snippets/arrayToHTMLList.md
+++ b/snippets/arrayToHTMLList.md
@@ -2,6 +2,7 @@
 title: Array to HTML list
 tags: browser,array
 expertise: intermediate
+cover: blog_images/red-succulent.jpg
 firstSeen: 2020-10-08T00:02:45+03:00
 lastUpdated: 2020-10-20T11:46:23+03:00
 ---
diff --git a/snippets/bifurcateBy.md b/snippets/bifurcateBy.md
index 4ab8bf82f..c96a32de0 100644
--- a/snippets/bifurcateBy.md
+++ b/snippets/bifurcateBy.md
@@ -2,6 +2,7 @@
 title: Bifurcate array based on function
 tags: array
 expertise: intermediate
+cover: blog_images/canoe.jpg
 firstSeen: 2018-02-14T12:13:07+02:00
 lastUpdated: 2020-11-01T20:50:57+02:00
 ---
diff --git a/snippets/bottomVisible.md b/snippets/bottomVisible.md
index 70627c354..152a49582 100644
--- a/snippets/bottomVisible.md
+++ b/snippets/bottomVisible.md
@@ -2,6 +2,7 @@
 title: Check if bottom of page is visible
 tags: browser
 expertise: beginner
+cover: blog_images/red-mountain.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/bucketSort.md b/snippets/bucketSort.md
index 9df508f38..c90a7ee43 100644
--- a/snippets/bucketSort.md
+++ b/snippets/bucketSort.md
@@ -3,6 +3,7 @@ title: Bucket sort
 tags: algorithm,array
 expertise: intermediate
 author: maciv
+cover: blog_images/canoe.jpg
 firstSeen: 2020-12-28T22:11:56+02:00
 lastUpdated: 2020-12-29T12:22:44+02:00
 ---
diff --git a/snippets/call.md b/snippets/call.md
index a89a378a6..355b786cc 100644
--- a/snippets/call.md
+++ b/snippets/call.md
@@ -2,6 +2,7 @@
 title: Call functions with context
 tags: function
 expertise: advanced
+cover: blog_images/rabbit-call.jpg
 firstSeen: 2017-12-22T21:54:30+02:00
 lastUpdated: 2021-06-13T13:50:25+03:00
 ---
diff --git a/snippets/cartesianProduct.md b/snippets/cartesianProduct.md
index 042387155..2c2e2ad84 100644
--- a/snippets/cartesianProduct.md
+++ b/snippets/cartesianProduct.md
@@ -3,6 +3,7 @@ title: Cartesian product
 tags: math,array
 expertise: beginner
 author: maciv
+cover: blog_images/sail-away.jpg
 firstSeen: 2020-12-28T20:23:47+02:00
 lastUpdated: 2020-12-29T12:31:43+02:00
 ---
diff --git a/snippets/chunkify.md b/snippets/chunkify.md
index 11ea54e43..cdf2ea5d3 100644
--- a/snippets/chunkify.md
+++ b/snippets/chunkify.md
@@ -3,6 +3,7 @@ title: Chunk iterable
 tags: function,generator,array
 expertise: advanced
 author: chalarangelo
+cover: blog_images/cave-view.jpg
 firstSeen: 2021-03-16T22:50:40+02:00
 lastUpdated: 2021-03-16T22:50:40+02:00
 ---
diff --git a/snippets/closest.md b/snippets/closest.md
index d8d732dbd..ed135612b 100644
--- a/snippets/closest.md
+++ b/snippets/closest.md
@@ -3,6 +3,7 @@ title: Closest numeric match
 tags: math,array
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/sparkles.jpg
 firstSeen: 2022-03-30T05:00:00-04:00
 ---
 
diff --git a/snippets/colorize.md b/snippets/colorize.md
index fae8e7b7b..29e96ab43 100644
--- a/snippets/colorize.md
+++ b/snippets/colorize.md
@@ -2,6 +2,7 @@
 title: Colorize text
 tags: node,string
 expertise: intermediate
+cover: blog_images/sea-view.jpg
 firstSeen: 2018-01-13T13:36:59+02:00
 lastUpdated: 2020-11-03T22:11:18+02:00
 ---
diff --git a/snippets/compactObject.md b/snippets/compactObject.md
index 8402af274..87364f931 100644
--- a/snippets/compactObject.md
+++ b/snippets/compactObject.md
@@ -2,6 +2,7 @@
 title: Compact object
 tags: object,array,recursion
 expertise: advanced
+cover: blog_images/shapes.jpg
 firstSeen: 2020-11-27T13:57:41+02:00
 lastUpdated: 2020-11-27T13:57:41+02:00
 ---
diff --git a/snippets/copySign.md b/snippets/copySign.md
index e7a1d760d..269574721 100644
--- a/snippets/copySign.md
+++ b/snippets/copySign.md
@@ -3,6 +3,7 @@ title: Copy sign to number
 tags: math
 expertise: beginner
 author: maciv
+cover: blog_images/keyboard-tea.jpg
 firstSeen: 2020-10-07T23:52:57+03:00
 lastUpdated: 2020-10-07T23:52:57+03:00
 ---
diff --git a/snippets/createDirIfNotExists.md b/snippets/createDirIfNotExists.md
index d969db302..8ec322da3 100644
--- a/snippets/createDirIfNotExists.md
+++ b/snippets/createDirIfNotExists.md
@@ -2,6 +2,7 @@
 title: Create directory if not exists
 tags: node
 expertise: beginner
+cover: blog_images/sunrise-over-city.jpg
 firstSeen: 2018-12-12T19:25:16+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
@@ -13,7 +14,8 @@ Creates a directory, if it does not exist.
 ```js
 const fs = require('fs');
 
-const createDirIfNotExists = dir => (!fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined);
+const createDirIfNotExists = dir =>
+  !fs.existsSync(dir) ? fs.mkdirSync(dir) : undefined;
 ```
 
 ```js
diff --git a/snippets/daysAgo.md b/snippets/daysAgo.md
index fcd638cf3..2cfbf9fb1 100644
--- a/snippets/daysAgo.md
+++ b/snippets/daysAgo.md
@@ -2,6 +2,7 @@
 title: Days ago
 tags: date
 expertise: beginner
+cover: blog_images/sunrise-over-city.jpg
 firstSeen: 2020-10-06T05:35:23+03:00
 lastUpdated: 2022-01-30T11:48:07+03:00
 ---
diff --git a/snippets/daysFromNow.md b/snippets/daysFromNow.md
index 3b432d3bc..b8edfea3e 100644
--- a/snippets/daysFromNow.md
+++ b/snippets/daysFromNow.md
@@ -2,6 +2,7 @@
 title: Days from now
 tags: date
 expertise: beginner
+cover: blog_images/tent-stars.jpg
 firstSeen: 2020-10-09T02:49:17+03:00
 lastUpdated: 2022-01-30T11:48:07+03:00
 ---
diff --git a/snippets/defer.md b/snippets/defer.md
index cf29d597d..ab7610255 100644
--- a/snippets/defer.md
+++ b/snippets/defer.md
@@ -2,6 +2,7 @@
 title: Defer function invocation
 tags: function
 expertise: intermediate
+cover: blog_images/cave-view.jpg
 firstSeen: 2018-01-01T23:40:31+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/detectLanguage.md b/snippets/detectLanguage.md
index 136af0186..92fed41b4 100644
--- a/snippets/detectLanguage.md
+++ b/snippets/detectLanguage.md
@@ -2,6 +2,7 @@
 title: Detect language
 tags: browser
 expertise: intermediate
+cover: blog_images/accessibility.jpg
 firstSeen: 2020-10-05T18:03:26+03:00
 lastUpdated: 2020-10-06T18:47:16+03:00
 ---
diff --git a/snippets/distance.md b/snippets/distance.md
index 21933b680..a45be7d1d 100644
--- a/snippets/distance.md
+++ b/snippets/distance.md
@@ -2,6 +2,7 @@
 title: Distance between two points
 tags: math,algorithm
 expertise: beginner
+cover: blog_images/measuring.jpg
 firstSeen: 2017-12-17T16:41:31+02:00
 lastUpdated: 2020-12-28T13:49:24+02:00
 ---
diff --git a/snippets/elementIsFocused.md b/snippets/elementIsFocused.md
index c6a1f8f42..1c6123e78 100644
--- a/snippets/elementIsFocused.md
+++ b/snippets/elementIsFocused.md
@@ -3,6 +3,7 @@ title: Element is focused
 tags: browser
 expertise: beginner
 author: chalarangelo
+cover: blog_images/ice.jpg
 firstSeen: 2020-08-07T15:21:27+03:00
 lastUpdated: 2020-10-19T18:51:03+03:00
 ---
diff --git a/snippets/fibonacci.md b/snippets/fibonacci.md
index 4dc598939..06e1b15b4 100644
--- a/snippets/fibonacci.md
+++ b/snippets/fibonacci.md
@@ -2,6 +2,7 @@
 title: Fibonacci
 tags: math,algorithm
 expertise: intermediate
+cover: blog_images/highlands.jpg
 firstSeen: 2017-12-17T16:41:31+02:00
 lastUpdated: 2020-12-28T13:49:24+02:00
 ---
diff --git a/snippets/findClosestAnchor.md b/snippets/findClosestAnchor.md
index ecd61419b..0da876a47 100644
--- a/snippets/findClosestAnchor.md
+++ b/snippets/findClosestAnchor.md
@@ -3,6 +3,7 @@ title: Find closest anchor
 tags: browser
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/colorful-lounge.jpg
 firstSeen: 2021-04-22T08:45:39+03:00
 lastUpdated: 2021-04-22T08:45:39+03:00
 ---
diff --git a/snippets/flatten.md b/snippets/flatten.md
index e58e162d1..57213f6ab 100644
--- a/snippets/flatten.md
+++ b/snippets/flatten.md
@@ -2,6 +2,7 @@
 title: Flatten array
 tags: array,recursion
 expertise: intermediate
+cover: blog_images/green-plant.jpg
 firstSeen: 2017-12-17T16:41:31+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/frozenSet.md b/snippets/frozenSet.md
index 0f5b0433a..ddd738dcc 100644
--- a/snippets/frozenSet.md
+++ b/snippets/frozenSet.md
@@ -3,6 +3,7 @@ title: Freeze Set object
 tags: array
 expertise: intermediate
 author: maciv
+cover: blog_images/frozen-globe.jpg
 firstSeen: 2020-10-11T11:52:48+03:00
 lastUpdated: 2020-10-11T11:52:48+03:00
 ---
diff --git a/snippets/fullscreen.md b/snippets/fullscreen.md
index b7a7f470e..a5d8b63b2 100644
--- a/snippets/fullscreen.md
+++ b/snippets/fullscreen.md
@@ -2,6 +2,7 @@
 title: Toggle fullscreen mode
 tags: browser
 expertise: intermediate
+cover: blog_images/antelope.jpg
 firstSeen: 2020-10-04T16:48:00+03:00
 lastUpdated: 2020-10-19T22:49:51+03:00
 ---
diff --git a/snippets/generateItems.md b/snippets/generateItems.md
index b6c185577..7171337e3 100644
--- a/snippets/generateItems.md
+++ b/snippets/generateItems.md
@@ -2,6 +2,7 @@
 title: Generate items
 tags: array,function
 expertise: intermediate
+cover: blog_images/generator.jpg
 firstSeen: 2020-10-09T20:41:21+03:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/generateUntil.md b/snippets/generateUntil.md
index 3c59932da..d7f1841b2 100644
--- a/snippets/generateUntil.md
+++ b/snippets/generateUntil.md
@@ -3,6 +3,7 @@ title: Generate until condition is met
 tags: function,generator
 expertise: advanced
 author: chalarangelo
+cover: blog_images/type-stamps.jpg
 firstSeen: 2022-01-21T05:00:00-04:00
 ---
 
diff --git a/snippets/generateWhile.md b/snippets/generateWhile.md
index a83b52d82..2d577a404 100644
--- a/snippets/generateWhile.md
+++ b/snippets/generateWhile.md
@@ -3,6 +3,7 @@ title: Generate while condition is met
 tags: function,generator
 expertise: advanced
 author: chalarangelo
+cover: blog_images/lake-loop.jpg
 firstSeen: 2022-01-21T05:00:00-04:00
 ---
 
diff --git a/snippets/geometricProgression.md b/snippets/geometricProgression.md
index c5f71b0f2..fd46f0e91 100644
--- a/snippets/geometricProgression.md
+++ b/snippets/geometricProgression.md
@@ -2,6 +2,7 @@
 title: Geometric progression
 tags: math,algorithm
 expertise: intermediate
+cover: blog_images/book-chair.jpg
 excerpt: Initializes an array containing the numbers in the specified geometric progression range.
 firstSeen: 2018-01-03T09:36:23+02:00
 lastUpdated: 2020-12-28T13:49:24+02:00
diff --git a/snippets/getParentsUntil.md b/snippets/getParentsUntil.md
index c39838ce6..e16ae182a 100644
--- a/snippets/getParentsUntil.md
+++ b/snippets/getParentsUntil.md
@@ -3,6 +3,7 @@ title: Get parents until element matches selector
 tags: browser
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/colorful-plastic.jpg
 firstSeen: 2021-01-05T22:47:21+02:00
 lastUpdated: 2021-01-06T13:04:18+02:00
 ---
diff --git a/snippets/hammingDistance.md b/snippets/hammingDistance.md
index f04160579..c866a3beb 100644
--- a/snippets/hammingDistance.md
+++ b/snippets/hammingDistance.md
@@ -2,6 +2,7 @@
 title: Hamming distance
 tags: math,algorithm
 expertise: intermediate
+cover: blog_images/colorful-lounge.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-12-28T13:49:24+02:00
 ---
diff --git a/snippets/hasDuplicates.md b/snippets/hasDuplicates.md
index 1edb7a2d9..699b98148 100644
--- a/snippets/hasDuplicates.md
+++ b/snippets/hasDuplicates.md
@@ -2,6 +2,7 @@
 title: Check if array has duplicates
 tags: array
 expertise: beginner
+cover: blog_images/umbrellas.jpg
 firstSeen: 2020-10-22T20:23:09+03:00
 lastUpdated: 2020-10-22T20:23:09+03:00
 ---
diff --git a/snippets/heapsort.md b/snippets/heapsort.md
index feaaeb474..632436b63 100644
--- a/snippets/heapsort.md
+++ b/snippets/heapsort.md
@@ -3,6 +3,7 @@ title: Heap sort
 tags: algorithm,array,recursion
 expertise: advanced
 author: chalarangelo
+cover: blog_images/building-blocks.jpg
 firstSeen: 2020-12-28T22:48:09+02:00
 lastUpdated: 2020-12-28T22:48:09+02:00
 ---
diff --git a/snippets/hide.md b/snippets/hide.md
index ac30b0103..d1c5942db 100644
--- a/snippets/hide.md
+++ b/snippets/hide.md
@@ -2,6 +2,7 @@
 title: Hide elements
 tags: browser,css
 expertise: beginner
+cover: blog_images/book-chair.jpg
 firstSeen: 2017-12-28T23:33:21+02:00
 lastUpdated: 2020-09-15T16:28:04+03:00
 ---
diff --git a/snippets/httpDelete.md b/snippets/httpDelete.md
index 6377975fd..a29ae86c4 100644
--- a/snippets/httpDelete.md
+++ b/snippets/httpDelete.md
@@ -2,6 +2,7 @@
 title: HTTP delete
 tags: browser
 expertise: intermediate
+cover: blog_images/beach-from-above.jpg
 firstSeen: 2020-04-16T11:21:33+03:00
 lastUpdated: 2020-10-19T22:49:51+03:00
 ---
diff --git a/snippets/httpGet.md b/snippets/httpGet.md
index d3aac9a0d..2f1b8a021 100644
--- a/snippets/httpGet.md
+++ b/snippets/httpGet.md
@@ -2,6 +2,7 @@
 title: HTTP get
 tags: browser
 expertise: intermediate
+cover: blog_images/boat-port.jpg
 firstSeen: 2018-01-08T18:21:52+02:00
 lastUpdated: 2020-10-19T22:49:51+03:00
 ---
diff --git a/snippets/httpPost.md b/snippets/httpPost.md
index 4b59d64a1..c65069ad5 100644
--- a/snippets/httpPost.md
+++ b/snippets/httpPost.md
@@ -2,6 +2,7 @@
 title: HTTP post
 tags: browser
 expertise: intermediate
+cover: blog_images/boats.jpg
 firstSeen: 2018-01-08T22:07:02+02:00
 lastUpdated: 2020-10-19T22:49:51+03:00
 ---
diff --git a/snippets/httpPut.md b/snippets/httpPut.md
index ccec409c9..04e7bea5a 100644
--- a/snippets/httpPut.md
+++ b/snippets/httpPut.md
@@ -2,6 +2,7 @@
 title: HTTP put
 tags: browser
 expertise: intermediate
+cover: blog_images/bridge.jpg
 firstSeen: 2020-04-16T11:21:33+03:00
 lastUpdated: 2020-10-19T22:49:51+03:00
 ---
diff --git a/snippets/httpsRedirect.md b/snippets/httpsRedirect.md
index 4ec39add0..c4f20acc0 100644
--- a/snippets/httpsRedirect.md
+++ b/snippets/httpsRedirect.md
@@ -2,6 +2,7 @@
 title: Redirect to HTTPS
 tags: browser
 expertise: intermediate
+cover: blog_images/blue-lake.jpg
 firstSeen: 2017-12-21T08:33:56+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/hz.md b/snippets/hz.md
index 9c0816334..bd9ca9e19 100644
--- a/snippets/hz.md
+++ b/snippets/hz.md
@@ -3,6 +3,7 @@ title: Hertz frequency of function
 tags: function
 expertise: intermediate
 unlisted: true
+cover: blog_images/lake-runner.jpg
 firstSeen: 2018-04-11T16:39:49+03:00
 lastUpdated: 2021-01-04T13:04:15+02:00
 ---
diff --git a/snippets/inRange.md b/snippets/inRange.md
index 7d5770c05..75433a118 100644
--- a/snippets/inRange.md
+++ b/snippets/inRange.md
@@ -2,6 +2,7 @@
 title: Number in range
 tags: math
 expertise: beginner
+cover: blog_images/armchair.jpg
 firstSeen: 2017-12-20T18:33:58+02:00
 lastUpdated: 2020-11-01T20:50:57+02:00
 ---
diff --git a/snippets/initializeArrayWithRange.md b/snippets/initializeArrayWithRange.md
index 3aec60015..ec70e0fa3 100644
--- a/snippets/initializeArrayWithRange.md
+++ b/snippets/initializeArrayWithRange.md
@@ -2,6 +2,7 @@
 title: Initialize array with range
 tags: array
 expertise: intermediate
+cover: blog_images/white-flower.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/insertionSort.md b/snippets/insertionSort.md
index b5c72f189..392cd03bd 100644
--- a/snippets/insertionSort.md
+++ b/snippets/insertionSort.md
@@ -3,6 +3,7 @@ title: Insertion sort
 tags: algorithm,array
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/goat-wooden-cottage.jpg
 firstSeen: 2020-12-28T21:53:53+02:00
 lastUpdated: 2020-12-28T21:53:53+02:00
 ---
diff --git a/snippets/isArrayLike.md b/snippets/isArrayLike.md
index 12dafe331..81dbd7199 100644
--- a/snippets/isArrayLike.md
+++ b/snippets/isArrayLike.md
@@ -2,6 +2,7 @@
 title: Value is array-like
 tags: type,array
 expertise: intermediate
+cover: blog_images/colorful-plastic.jpg
 firstSeen: 2017-12-31T14:53:01+02:00
 lastUpdated: 2020-10-20T23:02:01+03:00
 ---
diff --git a/snippets/isContainedIn.md b/snippets/isContainedIn.md
index 0ae7b8c92..0420ff9d5 100644
--- a/snippets/isContainedIn.md
+++ b/snippets/isContainedIn.md
@@ -3,6 +3,7 @@ title: Array is contained in other array
 tags: array
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/island-corridor.jpg
 firstSeen: 2020-01-05T21:40:51+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/isEmpty.md b/snippets/isEmpty.md
index d57dbca28..e7490588c 100644
--- a/snippets/isEmpty.md
+++ b/snippets/isEmpty.md
@@ -2,6 +2,7 @@
 title: Array is empty
 tags: type,array,object,string
 expertise: beginner
+cover: blog_images/book-chair.jpg
 firstSeen: 2018-01-23T19:25:17+02:00
 lastUpdated: 2020-10-20T23:02:01+03:00
 ---
diff --git a/snippets/isISOString.md b/snippets/isISOString.md
index dabda4e27..b20de1cd2 100644
--- a/snippets/isISOString.md
+++ b/snippets/isISOString.md
@@ -3,6 +3,7 @@ title: String is ISO formatted date
 tags: date
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/perfect-timing.jpg
 firstSeen: 2020-11-29T12:16:43+02:00
 lastUpdated: 2020-11-29T12:16:43+02:00
 ---
diff --git a/snippets/isLocalStorageEnabled.md b/snippets/isLocalStorageEnabled.md
index 8697495a0..f923bf4c2 100644
--- a/snippets/isLocalStorageEnabled.md
+++ b/snippets/isLocalStorageEnabled.md
@@ -3,6 +3,7 @@ title: Check if localStorage is enabled
 tags: browser
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/guitar-living-room.jpg
 firstSeen: 2020-12-31T13:13:47+02:00
 lastUpdated: 2020-12-31T13:13:47+02:00
 ---
diff --git a/snippets/isNull.md b/snippets/isNull.md
index 9ef844d5e..ff12ac476 100644
--- a/snippets/isNull.md
+++ b/snippets/isNull.md
@@ -2,6 +2,7 @@
 title: Value is null
 tags: type
 expertise: beginner
+cover: blog_images/broken-screen.jpg
 firstSeen: 2017-12-31T12:26:19+02:00
 lastUpdated: 2020-10-20T23:02:01+03:00
 ---
diff --git a/snippets/isObjectLike.md b/snippets/isObjectLike.md
index ff6ba2f3d..d060e8f00 100644
--- a/snippets/isObjectLike.md
+++ b/snippets/isObjectLike.md
@@ -2,6 +2,7 @@
 title: Value is object-like
 tags: type,object
 expertise: beginner
+cover: blog_images/orange-flower.jpg
 firstSeen: 2018-01-23T19:30:03+02:00
 lastUpdated: 2020-09-15T16:28:04+03:00
 ---
diff --git a/snippets/isSameOrigin.md b/snippets/isSameOrigin.md
index 7acd330a8..11d1e7f35 100644
--- a/snippets/isSameOrigin.md
+++ b/snippets/isSameOrigin.md
@@ -3,6 +3,7 @@ title: Same-origin URLs
 tags: object
 expertise: beginner
 author: chalarangelo
+cover: blog_images/keyboard-tea.jpg
 firstSeen: 2021-04-22T08:27:41+03:00
 lastUpdated: 2021-04-22T08:27:41+03:00
 ---
diff --git a/snippets/isSymbol.md b/snippets/isSymbol.md
index a37e01c7a..35cc2547d 100644
--- a/snippets/isSymbol.md
+++ b/snippets/isSymbol.md
@@ -2,6 +2,7 @@
 title: Value is symbol
 tags: type
 expertise: beginner
+cover: blog_images/naming-conventions.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-09-15T16:28:04+03:00
 ---
diff --git a/snippets/juxt.md b/snippets/juxt.md
index 09e7c69ff..1cb9bcf15 100644
--- a/snippets/juxt.md
+++ b/snippets/juxt.md
@@ -2,6 +2,7 @@
 title: Juxtapose functions
 tags: function
 expertise: advanced
+cover: blog_images/colorful-plastic.jpg
 firstSeen: 2020-05-20T19:58:39+03:00
 lastUpdated: 2020-10-20T23:29:39+03:00
 ---
diff --git a/snippets/levenshteinDistance.md b/snippets/levenshteinDistance.md
index 1f7797216..41188b1e7 100644
--- a/snippets/levenshteinDistance.md
+++ b/snippets/levenshteinDistance.md
@@ -3,6 +3,7 @@ title: Levenshtein distance
 tags: string,algorithm
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/armchair.jpg
 firstSeen: 2020-12-27T19:49:12+02:00
 lastUpdated: 2020-12-29T16:27:50+02:00
 ---
diff --git a/snippets/lowercaseKeys.md b/snippets/lowercaseKeys.md
index 87d8118ac..05e79d360 100644
--- a/snippets/lowercaseKeys.md
+++ b/snippets/lowercaseKeys.md
@@ -2,6 +2,7 @@
 title: Lowercase object keys
 tags: object
 expertise: intermediate
+cover: blog_images/forest-balcony.jpg
 firstSeen: 2017-12-29T13:28:18+02:00
 lastUpdated: 2020-10-20T11:21:07+03:00
 ---
diff --git a/snippets/median.md b/snippets/median.md
index b6a95c4f9..0c61e81c9 100644
--- a/snippets/median.md
+++ b/snippets/median.md
@@ -2,6 +2,7 @@
 title: Median
 tags: math,array
 expertise: intermediate
+cover: blog_images/old-consoles.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-10-22T20:23:47+03:00
 ---
diff --git a/snippets/merge.md b/snippets/merge.md
index 579013e38..493ca955d 100644
--- a/snippets/merge.md
+++ b/snippets/merge.md
@@ -2,6 +2,7 @@
 title: Merge objects
 tags: object,array
 expertise: intermediate
+cover: blog_images/guitar-living-room.jpg
 firstSeen: 2018-01-12T14:44:20+02:00
 lastUpdated: 2020-10-21T21:54:53+03:00
 ---
diff --git a/snippets/mergeSort.md b/snippets/mergeSort.md
index 6d1bb36d9..b92559772 100644
--- a/snippets/mergeSort.md
+++ b/snippets/mergeSort.md
@@ -3,6 +3,7 @@ title: Merge sort
 tags: algorithm,array,recursion
 expertise: advanced
 author: maciv
+cover: blog_images/baloons-field.jpg
 firstSeen: 2020-12-27T22:44:32+02:00
 lastUpdated: 2020-12-27T22:44:32+02:00
 ---
diff --git a/snippets/midpoint.md b/snippets/midpoint.md
index dfc3fdd0b..a6a1c72c8 100644
--- a/snippets/midpoint.md
+++ b/snippets/midpoint.md
@@ -2,6 +2,7 @@
 title: Midpoint
 tags: math
 expertise: beginner
+cover: blog_images/curve.jpg
 firstSeen: 2018-11-15T17:49:04+02:00
 lastUpdated: 2020-10-21T21:54:53+03:00
 ---
diff --git a/snippets/mostPerformant.md b/snippets/mostPerformant.md
index 6dfa27fb8..e4d4f1259 100644
--- a/snippets/mostPerformant.md
+++ b/snippets/mostPerformant.md
@@ -2,6 +2,7 @@
 title: Most performant function
 tags: function
 expertise: advanced
+cover: blog_images/lake-runner.jpg
 firstSeen: 2018-02-14T13:38:45+02:00
 lastUpdated: 2020-10-21T21:54:53+03:00
 ---
diff --git a/snippets/nest.md b/snippets/nest.md
index ec7eb3154..d07dc8424 100644
--- a/snippets/nest.md
+++ b/snippets/nest.md
@@ -2,6 +2,7 @@
 title: Nest objects
 tags: object,recursion
 expertise: intermediate
+cover: blog_images/birds.jpg
 firstSeen: 2018-02-24T13:49:56+02:00
 lastUpdated: 2020-10-21T21:54:53+03:00
 ---
diff --git a/snippets/nodeListToArray.md b/snippets/nodeListToArray.md
index c6d7e04d2..978d14dd0 100644
--- a/snippets/nodeListToArray.md
+++ b/snippets/nodeListToArray.md
@@ -2,6 +2,7 @@
 title: NodeList to array
 tags: browser,array
 expertise: beginner
+cover: blog_images/colors-mural.jpg
 firstSeen: 2018-05-06T18:11:21+03:00
 lastUpdated: 2020-10-21T21:54:53+03:00
 ---
diff --git a/snippets/none.md b/snippets/none.md
index 617709405..b8a0b1de9 100644
--- a/snippets/none.md
+++ b/snippets/none.md
@@ -2,6 +2,7 @@
 title: Test if all array elements are falsy
 tags: array
 expertise: beginner
+cover: blog_images/bug.jpg
 firstSeen: 2018-02-14T11:46:15+02:00
 lastUpdated: 2020-10-21T21:54:53+03:00
 ---
diff --git a/snippets/nthRoot.md b/snippets/nthRoot.md
index 5a9261b49..54a14d18a 100644
--- a/snippets/nthRoot.md
+++ b/snippets/nthRoot.md
@@ -3,6 +3,7 @@ title: Nth root of number
 tags: math
 expertise: beginner
 author: chalarangelo
+cover: blog_images/tree-roots.jpg
 firstSeen: 2021-01-06T22:47:48+02:00
 lastUpdated: 2021-01-06T22:47:48+02:00
 ---
diff --git a/snippets/observeMutations.md b/snippets/observeMutations.md
index c90c9b52a..4a96376bd 100644
--- a/snippets/observeMutations.md
+++ b/snippets/observeMutations.md
@@ -2,6 +2,7 @@
 title: Observe element mutations
 tags: browser,event
 expertise: advanced
+cover: blog_images/blue-sunrise.jpg
 firstSeen: 2018-01-13T14:58:52+02:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/onScrollStop.md b/snippets/onScrollStop.md
index e976c1d82..3bf1dbe2b 100644
--- a/snippets/onScrollStop.md
+++ b/snippets/onScrollStop.md
@@ -3,6 +3,7 @@ title: Handle scroll stop
 tags: browser,event
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/flower-pond.jpg
 firstSeen: 2021-01-07T00:31:14+02:00
 lastUpdated: 2021-01-07T00:31:14+02:00
 ---
diff --git a/snippets/pad.md b/snippets/pad.md
index e698a93f6..507f9e329 100644
--- a/snippets/pad.md
+++ b/snippets/pad.md
@@ -2,6 +2,7 @@
 title: Pad string
 tags: string
 expertise: beginner
+cover: blog_images/blue-lake.jpg
 firstSeen: 2018-02-24T11:51:27+02:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/pick.md b/snippets/pick.md
index 799db55ca..931db37bc 100644
--- a/snippets/pick.md
+++ b/snippets/pick.md
@@ -2,6 +2,7 @@
 title: Pick object keys
 tags: object
 expertise: intermediate
+cover: blog_images/fruit-feast.jpg
 firstSeen: 2017-12-13T23:51:34+02:00
 lastUpdated: 2020-10-18T14:58:09+03:00
 ---
diff --git a/snippets/pluck.md b/snippets/pluck.md
index 818cbedc5..3427b2b94 100644
--- a/snippets/pluck.md
+++ b/snippets/pluck.md
@@ -2,6 +2,7 @@
 title: Pluck values from array of objects
 tags: array,object
 expertise: beginner
+cover: blog_images/birds.jpg
 firstSeen: 2020-10-18T01:19:37+03:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/prefersDarkColorScheme.md b/snippets/prefersDarkColorScheme.md
index b3d3054ca..146425936 100644
--- a/snippets/prefersDarkColorScheme.md
+++ b/snippets/prefersDarkColorScheme.md
@@ -3,6 +3,7 @@ title: User prefers dark color scheme
 tags: browser
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/blue-lake.jpg
 firstSeen: 2020-05-04T12:50:35+03:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/prefersLightColorScheme.md b/snippets/prefersLightColorScheme.md
index c4c41116d..9ee78ee49 100644
--- a/snippets/prefersLightColorScheme.md
+++ b/snippets/prefersLightColorScheme.md
@@ -3,6 +3,7 @@ title: User prefers light color scheme
 tags: browser
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/dark-mode.jpg
 firstSeen: 2020-05-04T12:50:35+03:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/promisify.md b/snippets/promisify.md
index d3c8ef263..c20f89392 100644
--- a/snippets/promisify.md
+++ b/snippets/promisify.md
@@ -2,6 +2,7 @@
 title: Promisify function
 tags: function,promise
 expertise: intermediate
+cover: blog_images/duck-plants.jpg
 firstSeen: 2017-12-13T12:27:43+02:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/quarterOfYear.md b/snippets/quarterOfYear.md
index 5a63f3a3d..99bcea0c9 100644
--- a/snippets/quarterOfYear.md
+++ b/snippets/quarterOfYear.md
@@ -2,6 +2,7 @@
 title: Quarter of year
 tags: date
 expertise: beginner
+cover: blog_images/fallen-leaves.jpg
 firstSeen: 2020-10-09T10:23:55+03:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/quickSort.md b/snippets/quickSort.md
index 568bfa576..86e1263d2 100644
--- a/snippets/quickSort.md
+++ b/snippets/quickSort.md
@@ -3,6 +3,7 @@ title: Quick sort
 tags: algorithm,array,recursion
 expertise: advanced
 author: maciv
+cover: blog_images/eagle.jpg
 firstSeen: 2017-12-28T13:42:41+02:00
 lastUpdated: 2021-10-13T19:29:39+02:00
 ---
diff --git a/snippets/randomHexColorCode.md b/snippets/randomHexColorCode.md
index 37c0371ff..2717506bd 100644
--- a/snippets/randomHexColorCode.md
+++ b/snippets/randomHexColorCode.md
@@ -2,6 +2,7 @@
 title: Random hex color code
 tags: math,random
 expertise: beginner
+cover: blog_images/feathers.jpg
 firstSeen: 2017-12-24T14:39:21+02:00
 lastUpdated: 2021-01-08T00:23:44+02:00
 ---
diff --git a/snippets/ranking.md b/snippets/ranking.md
index cacd33da7..92b30ac8f 100644
--- a/snippets/ranking.md
+++ b/snippets/ranking.md
@@ -3,6 +3,7 @@ title: Array ranking
 tags: array,math
 expertise: intermediate
 author: chalarangelo
+cover: blog_images/eagle.jpg
 firstSeen: 2022-04-13T05:00:00-04:00
 ---
 
diff --git a/snippets/recordAnimationFrames.md b/snippets/recordAnimationFrames.md
index 64e4a40b8..1c503d181 100644
--- a/snippets/recordAnimationFrames.md
+++ b/snippets/recordAnimationFrames.md
@@ -2,6 +2,7 @@
 title: Record animation frames
 tags: browser,recursion
 expertise: intermediate
+cover: blog_images/curve.jpg
 firstSeen: 2018-02-28T08:19:07+02:00
 lastUpdated: 2020-10-22T20:24:04+03:00
 ---
diff --git a/snippets/requireUncached.md b/snippets/requireUncached.md
index 1647b54d1..5d74f553d 100644
--- a/snippets/requireUncached.md
+++ b/snippets/requireUncached.md
@@ -3,6 +3,7 @@ title: Uncached module require
 tags: node
 expertise: advanced
 author: chalarangelo
+cover: blog_images/curve.jpg
 firstSeen: 2020-08-07T15:49:39+03:00
 lastUpdated: 2020-09-15T16:28:04+03:00
 ---
diff --git a/snippets/sdbm.md b/snippets/sdbm.md
index 3a05caa83..dd5603265 100644
--- a/snippets/sdbm.md
+++ b/snippets/sdbm.md
@@ -2,6 +2,7 @@
 title: Hash string into number
 tags: math
 expertise: intermediate
+cover: blog_images/dark-leaves.jpg
 firstSeen: 2017-12-27T17:12:34+02:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/shank.md b/snippets/shank.md
index b8c41093a..cb6a1ce2d 100644
--- a/snippets/shank.md
+++ b/snippets/shank.md
@@ -2,6 +2,7 @@
 title: Remove elements from array
 tags: array
 expertise: intermediate
+cover: blog_images/avocado-slices.jpg
 excerpt: Removes an element from an array without mutating it.
 firstSeen: 2018-09-27T01:55:30+03:00
 lastUpdated: 2020-10-22T20:24:30+03:00
diff --git a/snippets/sortedIndex.md b/snippets/sortedIndex.md
index fac21c5bc..4fdf9b004 100644
--- a/snippets/sortedIndex.md
+++ b/snippets/sortedIndex.md
@@ -2,6 +2,7 @@
 title: Insertion index in sorted array
 tags: array,math
 expertise: intermediate
+cover: blog_images/apples.jpg
 firstSeen: 2017-12-31T16:39:06+02:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/stringifyCircularJSON.md b/snippets/stringifyCircularJSON.md
index bc7141e60..58c7fb03c 100644
--- a/snippets/stringifyCircularJSON.md
+++ b/snippets/stringifyCircularJSON.md
@@ -2,6 +2,7 @@
 title: Stringify circular JSON
 tags: object
 expertise: advanced
+cover: blog_images/periscope.jpg
 firstSeen: 2020-10-06T12:32:28+03:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/subSet.md b/snippets/subSet.md
index a2a9fdbe6..c65e41fff 100644
--- a/snippets/subSet.md
+++ b/snippets/subSet.md
@@ -3,6 +3,7 @@ title: Subset of iterable
 tags: array
 expertise: intermediate
 author: maciv
+cover: blog_images/last-light.jpg
 firstSeen: 2020-10-11T11:53:08+03:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/sum.md b/snippets/sum.md
index 498e3cb8d..f0e35425f 100644
--- a/snippets/sum.md
+++ b/snippets/sum.md
@@ -2,6 +2,7 @@
 title: Array sum
 tags: math,array
 expertise: beginner
+cover: blog_images/lake-trees.jpg
 firstSeen: 2017-12-29T13:29:49+02:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/symmetricDifference.md b/snippets/symmetricDifference.md
index b49807dac..7f50ac3ec 100644
--- a/snippets/symmetricDifference.md
+++ b/snippets/symmetricDifference.md
@@ -2,6 +2,7 @@
 title: Array symmetric difference
 tags: array,math
 expertise: intermediate
+cover: blog_images/trippy-chemicals.jpg
 firstSeen: 2017-12-17T17:55:51+02:00
 lastUpdated: 2020-10-22T20:24:30+03:00
 ---
diff --git a/snippets/times.md b/snippets/times.md
index b0a9f022a..04c8ba2cf 100644
--- a/snippets/times.md
+++ b/snippets/times.md
@@ -2,6 +2,7 @@
 title: Iterate n times
 tags: function
 expertise: intermediate
+cover: blog_images/lake-loop.jpg
 firstSeen: 2018-01-24T13:50:49+02:00
 lastUpdated: 2020-10-20T11:21:07+03:00
 ---
diff --git a/snippets/toRomanNumeral.md b/snippets/toRomanNumeral.md
index 7e82f8352..d41ed6e24 100644
--- a/snippets/toRomanNumeral.md
+++ b/snippets/toRomanNumeral.md
@@ -2,6 +2,7 @@
 title: Integer to roman numeral
 tags: math,string
 expertise: intermediate
+cover: blog_images/ancient-greek-building.jpg
 firstSeen: 2020-10-06T19:56:22+03:00
 lastUpdated: 2020-10-22T20:24:44+03:00
 ---
diff --git a/snippets/toSafeInteger.md b/snippets/toSafeInteger.md
index 3fbe00b01..a09e4151b 100644
--- a/snippets/toSafeInteger.md
+++ b/snippets/toSafeInteger.md
@@ -2,6 +2,7 @@
 title: Value to safe integer
 tags: math
 expertise: beginner
+cover: blog_images/mask-quiet.jpg
 firstSeen: 2018-01-08T17:12:46+02:00
 lastUpdated: 2020-10-22T20:24:44+03:00
 ---
diff --git a/snippets/untildify.md b/snippets/untildify.md
index f7550031a..2c52cf825 100644
--- a/snippets/untildify.md
+++ b/snippets/untildify.md
@@ -2,6 +2,7 @@
 title: Convert to absolute path
 tags: node,string
 expertise: beginner
+cover: blog_images/lighthouse.jpg
 firstSeen: 2018-01-01T17:43:18+02:00
 lastUpdated: 2020-10-22T20:24:44+03:00
 ---
diff --git a/snippets/vectorAngle.md b/snippets/vectorAngle.md
index e318f3eed..ab8e25d8f 100644
--- a/snippets/vectorAngle.md
+++ b/snippets/vectorAngle.md
@@ -2,6 +2,7 @@
 title: Vector angle
 tags: math
 expertise: beginner
+cover: blog_images/avocado-slices.jpg
 firstSeen: 2019-12-16T16:43:13+02:00
 lastUpdated: 2021-01-08T00:23:44+02:00
 ---
diff --git a/snippets/yesNo.md b/snippets/yesNo.md
index fc647459b..c165877d1 100644
--- a/snippets/yesNo.md
+++ b/snippets/yesNo.md
@@ -3,6 +3,7 @@ title: Check yes/no string
 tags: string,regexp
 expertise: intermediate
 unlisted: true
+cover: blog_images/mask-quiet.jpg
 firstSeen: 2017-12-30T18:35:54+02:00
 lastUpdated: 2021-01-04T13:04:15+02:00
 ---