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babel-plugin-transform-es2015-parameters

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babel-plugin-transform-es2015-parameters

Compile ES2015 default and rest parameters to ES5

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What is babel-plugin-transform-es2015-parameters?

The babel-plugin-transform-es2015-parameters package is a Babel plugin that transforms ES2015 (ES6) parameter features to ES5. This includes default parameters, rest parameters, and destructuring in function parameters.

What are babel-plugin-transform-es2015-parameters's main functionalities?

Default Parameters

This feature allows you to set default values for function parameters. If no argument is provided for the parameter, the default value is used.

function greet(name = 'World') { console.log('Hello ' + name); } greet(); // Hello World greet('Alice'); // Hello Alice

Rest Parameters

Rest parameters allow you to represent an indefinite number of arguments as an array. This is useful for functions that need to handle a variable number of arguments.

function sum(...numbers) { return numbers.reduce((acc, num) => acc + num, 0); } console.log(sum(1, 2, 3)); // 6

Destructuring in Parameters

Destructuring in function parameters allows you to unpack values from objects or arrays directly in the parameter list. This can make your code more readable and concise.

function printCoordinates({ x, y }) { console.log(`X: ${x}, Y: ${y}`); } printCoordinates({ x: 10, y: 20 }); // X: 10, Y: 20

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Package last updated on 07 Apr 2017

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