babel-helper-evaluate-path

path.evaluate wrapped in a try catch

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babel-helper-evaluate-path
0.5.05 years ago7 years agoMinified + gzip package size for babel-helper-evaluate-path in KB

Readme

babel-helper-evaluate-path
A wrapper for babel's path.evaluate
Fixes / Features:
  • Detect usages before initialization / declaration

function foo() {
  console.log(b); // ReferenceError
  let b = 1;
}

function bar() {
  console.log(a); // a is void 0
  var a = 5;
  console.log(a); // 5
}

  • Detect usages in scopes outside of initialization for vars (hoisted)

function foo() {
  if (a) var x = 5;
  console.log(x); // cannot determine
}

Installation

npm install babel-helper-evaluate-path --save-dev