salix/client/core/src/lib/modified.js

import {module} from '../module';
import isEqual from './equals';

export default function getModifiedData(object, objectOld) {
    var newObject = {};
    for (var k in object) {
        var val = object[k];
        var valOld = objectOld[k];

        if (val instanceof Object) {
            if (!isEqual(val, valOld)) {
                newObject[k] = getModifiedData(val, valOld);
            }
        }
        else if (val instanceof Array && val.length !== valOld.length) {
            newObject[k] = val;
        }
        else if (val !== valOld) {
            newObject[k] = val;
        }    
    }

    return newObject;
}

export const NAME = 'getDataModified';
module.value(NAME, getModifiedData);