跳到主要内容

@babel/plugin-transform-typeof-symbol

信息

This plugin is included in @babel/preset-env

Example

In

JavaScript
typeof Symbol() === "symbol";

Out

JavaScript
var _typeof = function(obj) {
return obj && obj.constructor === Symbol ? "symbol" : typeof obj;
};

_typeof(Symbol()) === "symbol";

Installation

npm install --save-dev @babel/plugin-transform-typeof-symbol

Usage

babel.config.json
{
"plugins": ["@babel/plugin-transform-typeof-symbol"]
}

Via CLI

Shell
babel --plugins @babel/plugin-transform-typeof-symbol script.js

Via Node API

JavaScript
require("@babel/core").transformSync("code", {
plugins: ["@babel/plugin-transform-typeof-symbol"],
});