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JavaScript

Sample

  • Prefer ES6 classes over prototypes.
  • Use strict equality checks (=== and !==) except when comparing against (null or undefined).
  • Prefer arrow functions =>, over the function keyword except when defining classes or methods.
  • Use semicolons at the end of each statement.
  • Prefer double quotes.
  • Use PascalCase for classes, lowerCamelCase for variables and functions, SCREAMING_SNAKE_CASE for constants, _singleLeadingUnderscore for private variables and functions.
  • Prefer template strings over string concatenation.
  • Prefer promises over callbacks.
  • Prefer array functions like map and forEach over for loops.
  • Use const for declaring variables that will never be re-assigned, and let otherwise.
  • Avoid var to declare variables.