节点 JS 意外字符“#”

Question

节点 JS 意外字符#。班级：export class Test{    #parent = null;    #name = null;    constructor(name, parent) {        this.#name = name;        if (parent) {            this.#parent = parent;        }    }}.babelrc：{  "presets": [    "@babel/preset-env"  ]}包.json："start": "babel-node"我正在运行脚本“开始”并收到此错误：SyntaxError: Unexpected character '#' (9:4)   7 |    8 | export class Test{>  9 |     #parent = null;     |     ^  10 |     #name = null;版本：-"@babel/core": "^7.8.7",-"@babel/node": "^7.8.7",-"@babel/preset-env": "^7.8.7",-node: v12.16.2-npm: 6.14.4怎么修？

Answer 1

从“stage-3”访问私有字段 - https://github.com/tc39/proposal-class-fields

您需要添加到 .babelrc：

  "plugins": [

    "@babel/plugin-syntax-dynamic-import",

    "@babel/plugin-syntax-import-meta",

    "@babel/plugin-proposal-class-properties",

    "@babel/plugin-proposal-json-strings"

  ]