babel-plugin-prepend

1.0.2 • Public • Published

babel-plugin-prepend Build Status

Babel plugin that allows a statement to be prepended on files during the transformation.

Install

With npm do:

npm i babel-plugin-prepend --D

Usage

The plugin accepts 2 options:

  • prepend: mandatory option that needs to contain the statement to be prepended during transformation
  • accept: a filter function to accept or deny transformation on files based on the file name

The prepend option needs to contain 1 single statement.

If the accept option is not needed, the plugin can be added to .babelrc as follows:

{
	"plugins": [
		[
			"prepend",
			{
				"prepend": "var a = 1;"
			}
		]
	]
}

If the 'accept' option is needed, then the plugin needs to be added to babel.config.js as follows:

{
	plugins: [
		[
			prepend,
			{
				prepend: 'var a = 1;',
				accept: function (filename) {
					return true;
				}
			}
		]
	];
}

Example

Input

var b = 2;

Output

var a = 1;
var b = 2;

Contributing

Feel free to submit pull requests. When adding anything new, please remember to update the tests file.

License

MIT © Marcos Pont

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Install

npm i babel-plugin-prepend

Weekly Downloads

3

Version

1.0.2

License

MIT

Unpacked Size

6.84 kB

Total Files

8

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Collaborators

  • marcospont