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babel-plugin-transform-es2015-typeof-symbol
ES6 introduces a new native type called symbols. This transformer wraps all
typeofexpressions with a method that replicates native behaviour. (ie. returning "symbol" for symbols)
Example
In
typeof Symbol() === "symbol";
Out
var _typeof = function (obj) {
return obj && obj.constructor === Symbol ? "symbol" : typeof obj;
};
_typeof(Symbol()) === "symbol";
Installation
npm install --save-dev babel-plugin-transform-es2015-typeof-symbol
Usage
Via .babelrc (Recommended)
.babelrc
{
"plugins": ["transform-es2015-typeof-symbol"]
}
Via CLI
babel --plugins transform-es2015-typeof-symbol script.js
Via Node API
require("babel-core").transform("code", {
plugins: ["transform-es2015-typeof-symbol"]
});