In JavaScript, there are various naming conventions that developers use for different types of identifiers, such as variables, functions, and constants. Here are some common naming conventions:

Camel Case:

• Description: The first letter is lowercase, and each subsequent word's first letter is capitalized.

Snake Case:

• Description: Words are separated by underscores, and all letters are lowercase.

Pascal Case (or Upper Camel Case):

• Description: Similar to camel case, but the first letter of each word is capitalized.

Kebab Case:

• Description: Words are separated by hyphens, and all letters are lowercase. Commonly used in URLs and CSS.

Train Case (similar to Kebab Case):

• Description: Similar to kebab case, but each word's first letter is capitalized.

Upper Case:

• • Description: All letters are uppercase, and words are separated by underscores. Commonly used for constants.

// Camel Case
let myVariable = 42;

// Snake Case
let my_variable = 42;


// Pascal Case
let MyVariable = 42;

// Train Case
let My-Variable = 42;

// Upper Case
const MY_CONSTANT = 42;
const CALCULATE_TOTAL_AMOUNT = 42;

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Note that these conventions are not strict rules enforced by the JavaScript language itself,It's generally a good practice to pick a consistent naming convention for your project or follow the convention used by the codebase you are contributing to.