There are the following rules for naming identifiers in JavaScript:
Composed of letters, numbers, $, _
Start with letters, $, _
Reserved words cannot be used! ! !
Make sense! ! ! ! ! ! !
Naming specification for identifiers:
1. Hump nomenclature
Except for the first word of the identifier, the first letter of the rest of the words is capitalized, for example: trueName
2. Snake type nomenclature
Separate words with _, for example: true_name
(Note: In most cases, identifiers starting with 1 to 2 underscores represent special variables or internal variables. When we define ourselves, try to avoid using variables starting with underscores)
(Super basic opinions, please criticize and correct me)
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