Some quizzes for JavaScript quirks.

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1. Promise order JavaScript Promise easy6488 tried
3. Promise then callbacks JavaScript Promise easy3329 tried
76. const JavaScript hard?3052 tried
5. block scope JavaScript easy2778 tried
2. Promise executor JavaScript Promise easy2761 tried
4. Promise then callbacks II JavaScript Promise easy2759 tried
6. Arrow Function JavaScript medium2508 tried
12. arguments JavaScript medium2346 tried
8. Implicit Coercion I JavaScript easy2121 tried
7. Increment Operator JavaScript easy2060 tried
70. function JavaScript easy1958 tried
93. string JavaScript easy1907 tried
9. null and undefined JavaScript medium1578 tried
68. if II JavaScript medium1493 tried
10. Equal JavaScript easy1433 tried
97. `this` V JavaScript easy1419 tried
67. if JavaScript medium1349 tried
27. Hoisting I JavaScript easy1166 tried
17. reduce JavaScript medium1117 tried
61. onClick JavaScript easy968 tried
84. Array.prototype.sort()JavaScript medium962 tried
69. undefined JavaScript easy962 tried
86. setTimeout III JavaScript easy945 tried
29. Hoisting III JavaScript easy941 tried
54. setTimeout(0ms)JavaScript easy907 tried
21. Array I JavaScript medium906 tried
11. Implicit Coercion II JavaScript easy871 tried
20. name for Function expression JavaScript medium828 tried
88. try...catch JavaScript medium813 tried
23. Promise.all()JavaScript easy813 tried
95. number format JavaScript easy811 tried
73. window name JavaScript medium811 tried
92. NaN JavaScript easy809 tried
38. Hoisting IV JavaScript easy803 tried
28. Hoisting II JavaScript easy801 tried
72. Array length JavaScript easy789 tried
89. let JavaScript easy788 tried
42. Hoisting V JavaScript medium779 tried
65. Function name JavaScript easy765 tried
94. emoji JavaScript easy752 tried
32. Hoisting IIII JavaScript medium725 tried
96. comparison JavaScript easy707 tried
13. Operator precedence JavaScript easy707 tried
41. `this` III JavaScript easy677 tried
14. Addition vs Unary Plus JavaScript easy671 tried
81. setTimeout II JavaScript easy666 tried
50. async await JavaScript easy659 tried
39. var JavaScript easy652 tried
19. `this`JavaScript easy628 tried
15. instanceOf JavaScript easy628 tried
63. in JavaScript easy624 tried
16. parseInt JavaScript easy611 tried
55. sparse array JavaScript medium610 tried
47. Promise Order II JavaScript easy592 tried
64. reference type JavaScript easy577 tried
91. largest Array index JavaScript easy570 tried
36. Promise.prototype.finally()JavaScript easy548 tried
22. min max JavaScript easy540 tried
45. Hoisting VI JavaScript easy537 tried
90. array keys JavaScript medium536 tried
43. JSON.stringify()JavaScript medium534 tried
37. push unshift JavaScript easy534 tried
18. Promise executor II JavaScript easy528 tried
51. method JavaScript medium517 tried
87. instanceOf 2 JavaScript easy503 tried
74. Typed Array length JavaScript easy497 tried
77. parseInt 2 JavaScript easy483 tried
60. postMessage JavaScript easy475 tried
44. Function call JavaScript easy475 tried
85. String.raw() JavaScript medium470 tried
62. MessageChannel JavaScript easy468 tried
49. `this` IV JavaScript easy444 tried
25. zero JavaScript medium433 tried
33. `this` II JavaScript easy424 tried
24. Equality & Sameness JavaScript easy415 tried
48. Prototype JavaScript easy413 tried
26. true or false JavaScript easy410 tried
83. Plus Plus JavaScript easy398 tried
46. Implicit Coercion IV JavaScript easy393 tried
53. Prototype 2 JavaScript easy369 tried
59. override setter JavaScript easy309 tried
52. requestAnimationFrame JavaScript easy309 tried
78. RegExp JavaScript RegExp medium297 tried
30. Equal II JavaScript easy290 tried
57. non-writable JavaScript easy282 tried
56. to primitive JavaScript medium274 tried
79. Equal III JavaScript easy267 tried
58. inherit getter setter JavaScript easy253 tried
66. comma JavaScript easy252 tried
31. Math JavaScript easy240 tried
34. precedence JavaScript easy236 tried
82. Proxy II JavaScript medium219 tried
75. meaningless calculation JavaScript easy215 tried
35. Implicit Coercion III JavaScript easy215 tried
40. RegExp.prototype.test JavaScript easy212 tried
71. two-way generator JavaScript easy211 tried
80. Proxy I JavaScript easy189 tried