将 var 转化为 let

2024年11月10日

柏拉文

越努力，越幸运

一、认识

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二、实现

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const jscodeshift = require("jscodeshift");

function transformVarToLet(sourceCode) {
  const ast = jscodeshift(sourceCode);
  const { VariableDeclaration, variableDeclaration } = jscodeshift;

  return ast
    .find(VariableDeclaration, { kind: "var" })
    .replaceWith((path) => {
      return variableDeclaration("let", path.node.declarations);
    })
    .toSource();
}

const sourceCode = `var a = 1; var b = 2;`;
const transformedCode = transformVarToLet(sourceCode);
console.log(transformedCode);