taskflow/frontend/src/components/ui/Modal.tsx at main · zeeshan56656/taskflow · GitHub

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'use client';

import { useEffect } from 'react';
import { createPortal } from 'react-dom';

interface ModalProps {
  open: boolean;
  onClose: () => void;
  title: string;
  children: React.ReactNode;
}

/**
 * Lightweight accessible modal: portals to <body>, closes on Escape and on
 * backdrop click, locks background scroll while open, and exposes dialog ARIA.
 * No modal library — just the primitives done correctly.
 */
export function Modal({ open, onClose, title, children }: ModalProps) {
  useEffect(() => {
    if (!open) return;
    const onKey = (e: KeyboardEvent) => {
      if (e.key === 'Escape') onClose();
    };
    document.addEventListener('keydown', onKey);
    const prevOverflow = document.body.style.overflow;
    document.body.style.overflow = 'hidden';
    return () => {
      document.removeEventListener('keydown', onKey);
      document.body.style.overflow = prevOverflow;
    };
  }, [open, onClose]);

  if (!open || typeof document === 'undefined') return null;

  return createPortal(
    <div
      className="modal-overlay"
      onMouseDown={(e) => {
        if (e.target === e.currentTarget) onClose();
      }}
    >
      <div
        className="modal"
        role="dialog"
        aria-modal="true"
        aria-label={title}
      >
        <header className="modal-header">
          <h2 className="modal-title">{title}</h2>
          <button
            type="button"
            className="modal-close"
            aria-label="Close"
            onClick={onClose}
          >
            <svg
              width="16"
              height="16"
              viewBox="0 0 16 16"
              fill="none"
              stroke="currentColor"
              strokeWidth="2"
              strokeLinecap="round"
              aria-hidden="true"
            >
              <path d="M4 4l8 8M12 4l-8 8" />
            </svg>
          </button>
        </header>
        <div className="modal-body">{children}</div>
      </div>
    </div>,
    document.body,
  );
}