aefbb1380e
* No unneeded empty arrays in transform spread Since Array.prototype.concat creates a new array from inputs, there's no need to call it from a new empty array ([].concat()). * [fixup] simplify detection of new array
863 B
863 B
@babel/plugin-transform-spread
Compile ES2015 spread to ES5
Example
In
var a = ['a', 'b', 'c'];
var b = [...a, 'foo'];
Out
var a = [ 'a', 'b', 'c' ];
var b = a.concat([ 'foo' ]);
Installation
npm install --save-dev @babel/plugin-transform-spread
Usage
Via .babelrc (Recommended)
.babelrc
Without options:
{
"plugins": ["@babel/transform-spread"]
}
With options:
{
"plugins": [
["@babel/transform-spread", {
"loose": true
}]
]
}
Via CLI
babel --plugins @babel/transform-spread script.js
Via Node API
require("@babel/core").transform("code", {
plugins: ["@babel/transform-spread"]
});
Options
loose
boolean, defaults to false.
In loose mode, all iterables are assumed to be arrays.