(mem) - JavaScript

property access

(mem prop? obj?)

Where:

1. prop: property name or computed key (the b in a.b or the expr in a[expr]) *
2. obj: value being accessed (the a in a.b) *

Matching:

1. dot access, e.g. a.b
2. computed access, e.g. a[expr]
3. private fields, e.g. a.#field

Examples

Remove a deprecated debug flag by finding reads of config.debug.

(mem debug config)

Selects in lines { 1 } but not in { 2, 3 }:

if (config.debug) { log("debug") }
if (config.verbose) { log("debug") }
if (settings.debug) { log("debug") }

---

Migrate storage keys by finding direct access to localStorage["token"].

(mem (comp (str "token")) localStorage)

Selects in lines { 1 } but not in { 2, 3 }:

const token = localStorage["token"]
const session = localStorage["session"]
const token2 = sessionStorage["token"]

---

Audit inline styling by finding uses of the style property.

(mem style)

Selects in lines { 1, 2 } but not in { 3 }:

button.style.color = "red"
card.style = {}
styles.theme = "dark"

---

Arguments

prop

1. Identifier: shorthand for (id)
   
2. Pattern: shorthand for (id)
   
3. (id)
   
4. (comp)
   
5. (:into)
6. (:nearest)
7. (:and)
8. (:or)
9. (:not)
10. (:text)
11. (:kind)
12. (:replace)
13. (:replace-in)
14. (:capture)

obj

1. Identifier: shorthand for (id)
   
2. Pattern: shorthand for (id)
   
3. (:ref)
4. (:into)
5. (:nearest)
6. (:and)
7. (:or)
8. (:not)
9. (:text)
10. (:kind)
11. (:replace)
12. (:replace-in)
13. (:capture)
14. (arr)
15. (bin)
16. (bool)
17. (call)
18. (comp)
19. (fun)
20. (id)
21. (id+)
22. (jsx)
23. (mem)
24. (null)
25. (num)
26. (obj)
27. (of)
28. (regex)
29. (regex+)
30. (str)
31. (str*)
32. (str+)
33. (tpl)
34. (tpl*)