web-ui-pack/helpers/objectToFormData.js

Web package with UI elements

export default function objectToFormData(fromObj, toForm, opts) {
    toForm ||= new FormData();
    const canNulls = opts?.includeNulls ?? false;
    const isBracketNotation = opts?.bracketNotation ?? false;
    const useArrayNotation = opts?.arrayNotationForPlainTypes ?? false;
    function map(v, prop) {
        if (Array.isArray(v)) {
            v.forEach((val, index) => {
                const skipArrNotation = !useArrayNotation && (val == null || typeof val !== "object" || val instanceof Date || val instanceof File);
                const propWithIndex = skipArrNotation ? prop : `${prop}[${index}]`;
                map(val, propWithIndex);
            });
        }
        else if (v == null) {
            if (canNulls) {
                toForm.append(prop, "");
            }
        }
        else if (typeof v === "object") {
            if (v instanceof Date) {
                toForm.append(prop, v.toJSON());
            }
            else if (v instanceof File) {
                toForm.append(prop, v, v.name);
            }
            else if (isBracketNotation) {
                Object.keys(v).forEach((key) => {
                    const s = prop ? `${prop}[${key}]` : key;
                    map(v[key], s);
                });
            }
            else {
                Object.keys(v).forEach((key) => {
                    const s = `${prop ? `${prop}.` : ""}${key}`;
                    map(v[key], s);
                });
            }
        }
        else {
            toForm.append(prop, v);
        }
    }
    map(fromObj, "");
    return toForm;
}