ast 模板

https://www.cnblogs.com/hanyanling/p/13246736.html

const fs = require('fs');
const {parse} = require("@babel/parser");
const traverse = require("@babel/traverse").default;
const t = require("@babel/types");
const generator = require("@babel/generator").default;

let jscode = fs.readFileSync("./demo.js", {
    encoding: "utf-8"
});


let ast = parse(jscode);

const Identifier2value = {
       
        VariableDeclarator(path)
        { 

　　　　　}
 }

traverse(ast, Identifier2value);

let {code} = generator(ast);

fs.writeFileSync('./demoNew.js', code,{
    encoding :'utf-8'
})