add-variable-declarations
Add variable declarations for implicit global variable assignments.
Install
$ npm install [--save-dev] add-variable-declarations
Usage
import addVariableDeclarations from 'add-variable-declarations';
const source = `
PI = 3.14;
radius = 8;
circumference = 2 * PI * radius;
`;
console.log(addVariableDeclarations(source).code);
FAQ
Why?
This project is used by decaffeinate to add variable
declarations to converted CoffeeScript code. This project is not intended to
allow you to write JavaScript without variable declarations, as I consider that
a bad practice for the same reasons it's a bad practice in CoffeeScript.
Why var
? Shouldn't this use let
and const
?
Yes, but not all situations allow the use of let
and const
, such as when
the variable binding takes advantage of
hoisting.
If you want let
and const
you can use this library in combination with
esnext which will turn all eligible var
declarations into let
or const
as appropriate.
License
MIT