01 — Is search collapsed or visible at all times?
02 — Do we want search to be prominent or hidden?
03 — Is search box actually a search box?
04 — Do we explain various types of search (symptom, item number)?
06 — Is search input keyboard-focusable?
07 — What changes when the input field is in focus?
08 — Do we darken the rest of the screen to bring search into focus?
09 — Do we show popular searches, products or categories on focus?
11 — Do we use look-ahead pattern for search queries?
12 — How many suggestions do we display on desktop?
13 — How many suggestions do we display on mobile?
14 — How do we design autosuggestions?
16 — Do we show keywords, featured products, categories and brands?
17 — Do we highlight user’s input (keyword) within suggestions?
18 — Do we display the number of expected results for each suggestion?
20 — Do we display any thumbnails? If yes, how large should they be?
21 — Do we display popular keywords, category, products, guides, content pages?
22 — How do we change the design on hover/tap?
24 — Do we persist search input on search results page?
25 — Do we display breadcrumbs, categories and search results count?
26 — Do we have an an option to look up and clear all previous searches?
28 — Do we suggest categories or keywords in search results?
29 — Does autocomplete disappear when the entire query is removed?
30 — Have we tested the behavior with empty space and special characters?
32 — Do we keep track of thematic and seasonal queries?
33 — Do we keep track of misspellings via search logs?
More checklists: smashingmagazine.com/the-smashing-n…
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