data.js

// From https://github.com/jquery/jquery-migrate/blob/master/src/data.js
//
// https://jquery.com/upgrade-guide/3.0/#data

/* eslint-disable prefer-rest-params, func-names */
export default function () {
    const oldData = jQuery.data;
    jQuery.data = function (elem, name, value) {
        let curData;

        // Name can be an object, and each entry in the object is meant to be set as data
        if (name && typeof name === 'object' && arguments.length === 2) {
            curData = jQuery.hasData(elem) && oldData.call(this, elem);
            const sameKeys = {};
            for (const key in name) {
                if (key !== jQuery.camelCase(key)) {
                    curData[key] = name[key];
                } else {
                    sameKeys[key] = name[key];
                }
            }

            oldData.call(this, elem, sameKeys);
            return name;
        }

        // If the name is transformed, look for the un-transformed name in the data object
        if (name && typeof name === 'string' && name !== jQuery.camelCase(name)) {
            curData = jQuery.hasData(elem) && oldData.call(this, elem);
            if (curData && name in curData) {
                if (arguments.length > 2) {
                    curData[name] = value;
                }
                return curData[name];
            }
        }

        return oldData.apply(this, arguments);
    };
}
/* eslint-enable prefer-rest-params */