@modular-forms/react/dist/source/utils/isFieldDirty.js

The modular and type-safe form library for React

/**
 * Returns whether the field is dirty.
 *
 * @param startValue The start value.
 * @param currentValue The current value.
 *
 * TODO: Should we pass field as paramater instead of values?
 *
 * @returns Whether is dirty.
 */
export function isFieldDirty(startValue, currentValue) {
    const toValue = (item) => item instanceof Blob ? item.size : item;
    return Array.isArray(startValue) && Array.isArray(currentValue)
        ? startValue.map(toValue).join() !== currentValue.map(toValue).join()
        : startValue instanceof Date && currentValue instanceof Date
            ? startValue.getTime() !== currentValue.getTime()
            : Number.isNaN(startValue) && Number.isNaN(currentValue)
                ? false
                : startValue !== currentValue;
}