Adopt type=module

[Fil]

follow changes in d3-format:

• type=module
• add exports
• remove zip
• license: ISC
• update dependencies

TODO:

• update README.md
• check LICENSE
• merge remove all children #276
• fix the failing tests (90!), due to a different environment (global is undefined)
• switch the default branch to main

[aulonm]

This is just a suggestion, not an actual way of doing it, since I'm not 100% sure how to fix it completely.

The reason why some of the tests fail, is because the select-methods create a javascript function (correct me if I'm wrong) and then in the tests we are asserting a function with an object.

d3.select returns:

Selection {
  _groups: [ [ HTMLHeadingElement {} ] ],
  _parents: [ HTMLHtmlElement {} ]
}

Trying to deepStrictEqual-assert it against an object:

{
  _groups: [ [ HTMLHeadingElement {} ] ],
  _parents: [ HTMLHtmlElement {} ]
}

This will fail off course, while it would pass when using deepEqual because its not strict

A more simple example:

function ex(msg) {
  this._msg = msg;
}

const f = new ex('hello');
console.log(f); // -> f { _msg: 'hello' }

const object = { _msg: 'hello' };
console.log(object) // -> { _msg: 'hello' }

console.log(f === object) // -> false

The reason we get document is not defined is because jsdom does not make a global.document, we would need to do that ourselves, which I've added as a suggestion in the /tests/jsdom.js file

[Fil]

some progress! thanks for the hints. We're down to 44 fails :)