Function comparePropValues

docs/app/js/sanddance-app.js:87687–87696

(newProp, oldProp, propType)

    return null;
}
function comparePropValues(newProp, oldProp, propType) {
    var equal = propType && propType.equal;
    if (equal && !equal(newProp, oldProp, propType)) return "changed deeply";
    if (!equal) {
        equal = newProp && oldProp && newProp.equals;
        if (equal && !equal.call(newProp, oldProp)) return "changed deeply";
    }
    if (!equal && oldProp !== newProp) return "changed shallowly";
    return null;
}
function diffDataProps(props, oldProps) {
    if (oldProps === null) return "oldProps is null, initial diff";
    var dataChanged = null;