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@swc/helpers

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@swc/helpers

External helpers for the swc project.

  • 0.4.12
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
14M
increased by1.32%
Maintainers
1
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Created

What is @swc/helpers?

The @swc/helpers package provides a set of helper functions designed to be used with the SWC compiler. These helpers are primarily used to polyfill or transform code in a way that makes newer JavaScript features compatible with older environments. This includes handling classes, async functions, spread operators, and more, ensuring that code utilizing modern JavaScript syntax can be transpiled for compatibility with environments that do not natively support these features.

What are @swc/helpers's main functionalities?

Class handling

This feature allows for the transformation of ES6 classes into a format that can be understood by older JavaScript engines. The code sample demonstrates how a class with a method is transformed using the @swc/helpers package.

"use strict";
var _createClass = require("@swc/helpers/lib/_create_class.js").default;
var MyClass = /*#__PURE__*/function () {
  function MyClass() {}
  _createClass(MyClass, [{
    key: "method",
    value: function method() {}
  }]);
  return MyClass;
}();

Async/Await handling

This feature transforms async functions into generator functions with a regenerator runtime, making it possible to use async/await syntax in environments that do not support it natively. The code sample shows how an async function is transformed using @swc/helpers.

"use strict";
var _asyncToGenerator = require("@swc/helpers/lib/_async_to_generator.js").default;
function exampleFunction() {
  return _asyncToGenerator(function* () {
    var data = yield fetchData();
    console.log(data);
  })();
}

Spread operator handling

This feature provides a way to transform the spread operator in arrays and function calls into equivalent ES5 code. The code sample demonstrates how an array is concatenated with another array using the spread operator, transformed by @swc/helpers.

"use strict";
var _toConsumableArray = require("@swc/helpers/lib/_to_consumable_array.js").default;
var arr1 = [1, 2, 3];
var arr2 = [4, 5].concat(_toConsumableArray(arr1));

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Package last updated on 09 Oct 2022

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