无法将使用 React Portal 和 Tailwind CSS 的 `@headlessui/react` 中的 `Dialog/Modal` 居中？

Question

我想让它像https://tailwindui.com/components/application-ui/overlays/modals 上的第一个模态一样居中

我在下面的 Modal 上复制了相同的类，但我无法将其垂直居中。类是完全相同的。

这是一个 React Portal 问题吗？

Modal.tsx

import * as React from "react"
import { Dialog } from "@headlessui/react"

type ModalProps = {
    isOpen: boolean
    setIsOpen: React.Dispatch<React.SetStateAction<boolean>>
}

export const Modal = ({ isOpen, setIsOpen }: ModalProps) => {
    return (
        <Dialog
            open={isOpen}
            onClose={setIsOpen}
            as="div"
            className="fixed inset-0 z-10 overflow-y-auto"
        >
            <div className="flex flex-col bg-gray-800 text-white w-96 mx-auto py-8 px-4 text-center">
                <Dialog.Overlay />

                <Dialog.Title className="text-red-500 text-3xl">
                    Deactivate account
                </Dialog.Title>
                <Dialog.Description className="text-xl m-2">
                    This will permanently deactivate your account
                </Dialog.Description>

                <p className="text-md m-4">
                    Are you sure you want to deactivate your account? All of your data
                    will be permanently removed. This action cannot be undone.
                </p>

                <button
                    className="w-full m-4 inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 bg-red-600 text-base font-medium text-white hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500 sm:ml-3 sm:w-auto sm:text-sm"
                    onClick={() => setIsOpen(false)}
                >
                    Deactivate
                </button>
                <button
                    className="m-4 w-full inline-flex justify-center rounded-md border border-gray-300 shadow-sm px-4 py-2 bg-white text-base font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 sm:mt-0 sm:ml-3 sm:w-auto sm:text-sm"
                    onClick={() => setIsOpen(false)}
                >
                    Cancel
                </button>
            </div>
        </Dialog>
    )
}

代码沙盒 → https://codesandbox.io/s/headless-ui-dialog-1gd8e

我想将它垂直和水平居中。我该怎么做？

Answer 1

我必须将 flex justify-center items-center 添加到父级并从子级中删除 mx-auto 类。

import * as React from "react"
import { Dialog } from "@headlessui/react"
import clsx from "clsx"

type ModalProps = {
    isOpen: boolean
    setIsOpen: React.Dispatch<React.SetStateAction<boolean>>
}

export const Modal = ({ isOpen, setIsOpen }: ModalProps) => {
    return (
        <Dialog
            open={isOpen}
            onClose={setIsOpen}
            as="div"
            className={clsx(
                "fixed inset-0 z-10 overflow-y-auto flex justify-center items-center",
                {
                    "bg-gray-900": isOpen === true,
                },
            )}
        >
            <div className="flex flex-col bg-gray-800 text-white w-96 py-8 px-4 text-center">
                <Dialog.Overlay />

                <Dialog.Title className="text-red-500 text-3xl">
                    Deactivate account
                </Dialog.Title>
                <Dialog.Description className="text-xl m-2">
                    This will permanently deactivate your account
                </Dialog.Description>

                <p className="text-md m-4">
                    Are you sure you want to deactivate your account? All of your data
                    will be permanently removed. This action cannot be undone.
                </p>

                <button
                    className="w-full m-4 inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 bg-red-600 text-base font-medium text-white hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500 sm:ml-3 sm:w-auto sm:text-sm"
                    onClick={() => setIsOpen(false)}
                >
                    Deactivate
                </button>
                <button
                    className="m-4 w-full inline-flex justify-center rounded-md border border-gray-300 shadow-sm px-4 py-2 bg-white text-base font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 sm:mt-0 sm:ml-3 sm:w-auto sm:text-sm"
                    onClick={() => setIsOpen(false)}
                >
                    Cancel
                </button>
            </div>
        </Dialog>
    )
}

现在看起来很完美 → https://codesandbox.io/s/headless-ui-dialog-1gd8e