When we use the features in stage3 without babel plugins, the webpack will give an error similar to the following
ERROR in ./index.js 2:9
Module parse failed: Unexpected token (2:9)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
| class Rectangle {
> height = 0;
| width;
|
In the package.json file resolutions section, declare that the acorn-with-stage3 package is used to replace the acorn package that the webpack uses as a parser.
package.json:
{
...
"resolutions": {
"acorn": "npm:acorn-with-stage3"
},
"dependencies": {
important note: "resolutions" works with yarn (selective dependency resolutions).
To use with npm: https://github.com/rogeriochaves/npm-force-resolutions