[compatibility] version 4.6.9 broken on IE 11

Your Environment

• flatpickr version used: 4.6.9
• Browser name and version: IE 11
• OS and version: Windows 10

Looks like it’s because of polyfill for Object.assign (node_modules/flatpickr/dist/esm/utils/polyfills.js) that uses spread operator ... in function definition params:

"use strict";
if (typeof Object.assign !== "function") {
    Object.assign = function (target, ...args) {
        if (!target) {
            throw TypeError("Cannot convert undefined or null to object");
        }
        for (const source of args) {
            if (source) {
                Object.keys(source).forEach((key) => (target[key] = source[key]));
            }
        }
        return target;
    };
}

[robinchow]

From what I can tell, the problem is now package.json specifies "module": "dist/esm/index.js", so if you’re doing bundling, it defaults to using that file (which contains the ES6 code)

I got flatpickr working in IE11 by putting the following in my webpack config:

  resolve: {
    alias: {
      'flatpickr$': 'flatpickr/dist/flatpickr.js',
    },
  },

which tells webpack to specifically use the transpiled ES5-compliant file.

Hope that helps.

[fuhlig]

This kind of change needs to be documented properly (changelog / release-notes). Following semantic-versioning, this is even a breaking-change.