estree-variable-scopes

estree-variable-scopes

An NPM package that shows the top scope of defined variables and what variable can access to another specific variable

Usage

Getting all of the variables and it's grandparents

import { getVariables } from "estree-variable-scopes";

const code = `
let a = "Hello!"
let b = "Hi!"

const goodMorning = () => {
 const str = "Good morning!"
}
`
console.log(getVariables(code)) //will print all of the defined variables and it's grandparents

Checking a variable can access to a specific variable

import { getVariables, canAccess } from "estree-variable-scopes";

const code = `
let a = "Hello!"
let b = "Hi!"

const goodMorning = () => {
 const str = "Good morning!"
}
`

const scopes = getVariables(code)
const a_value = scopes[0].vars[0] //will point to variable "a" in global scope
const str_value = scopes[1].vars[0] //will point to variable "str" in goodMorning function 
console.log(canAccess(str_value, a_value, scopes)) //will print true because "str" can access to variable "a" in global scope