Version v7.17.0

Release date

February 18th, 2025

Source code

Portal reuseTargetNode prop

Portal component now supports reuseTargetNode prop which allows to reuse the same target node for all instances. This option is more performant than the previous behavior, it is recommended to be enabled. This option will be enabled by default in the 8.0 major release.

To enable reuseTargetNode option in all components that depend on Portal, add the following code to your theme:

import { createTheme, Portal } from '@mantine/core';

export const theme = createTheme({
  components: {
    Portal: Portal.extend({
      defaultProps: {
        reuseTargetNode: true,
      },
    }),
  }
});

Example usage. In the following example, all three paragraphs will be rendered in the same target node:

import { Portal } from '@mantine/core';

function Demo() {
  return (
    <>
      <Portal reuseTargetNode>
        <p>First</p>
      </Portal>

      <Portal reuseTargetNode>
        <p>Second</p>
      </Portal>

      <Portal reuseTargetNode>
        <p>Third</p>
      </Portal>
    </>
  );
}

use-form formRootRule

formRootRule is a special rule path that can be used to validate objects and arrays alongside with their nested fields. For example, it is useful when you want to capture a list of values, validate each value individually and then validate the list itself to not be empty:

import { IconTrash } from '@tabler/icons-react';
import { ActionIcon, Button, Group, Switch, Text, TextInput } from '@mantine/core';
import { formRootRule, isNotEmpty, useForm } from '@mantine/form';
import { randomId } from '@mantine/hooks';

function Demo() {
  const form = useForm({
    mode: 'uncontrolled',
    initialValues: {
      employees: [{ name: '', active: false, key: randomId() }],
    },
    validate: {
      employees: {
        [formRootRule]: isNotEmpty('At least one employee is required'),
        name: isNotEmpty('Name is required'),
      },
    },
  });

  const fields = form.getValues().employees.map((item, index) => (
    <Group key={item.key} mt="xs">
      <TextInput
        placeholder="John Doe"
        withAsterisk
        style={{ flex: 1 }}
        key={form.key(`employees.${index}.name`)}
        {...form.getInputProps(`employees.${index}.name`)}
      />
      <Switch
        label="Active"
        key={form.key(`employees.${index}.active`)}
        {...form.getInputProps(`employees.${index}.active`, { type: 'checkbox' })}
      />
      <ActionIcon color="red" onClick={() => form.removeListItem('employees', index)}>
        <IconTrash size={16} />
      </ActionIcon>
    </Group>
  ));

  return (
    <form onSubmit={form.onSubmit(() => {})}>
      {fields.length > 0 ? (
        <Group mb="xs">
          <Text fw={500} size="sm" style={{ flex: 1 }}>
            Name
          </Text>
          <Text fw={500} size="sm" pr={90}>
            Status
          </Text>
        </Group>
      ) : (
        <Text c="dimmed" ta="center">
          No one here...
        </Text>
      )}

      {fields}

      {form.errors.employees && (
        <Text c="red" size="sm" mt="sm">
          {form.errors.employees}
        </Text>
      )}

      <Group justify="space-between" mt="md">
        <Button
          variant="default"
          onClick={() => {
            form.insertListItem('employees', { name: '', active: false, key: randomId() });
            form.clearFieldError('employees');
          }}
        >
          Add employee
        </Button>
        <Button type="submit">Submit</Button>
      </Group>
    </form>
  );
}

Another example is to validate an object fields combination:

import { Button, Text, TextInput } from '@mantine/core';
import { formRootRule, isNotEmpty, useForm } from '@mantine/form';

function Demo() {
  const form = useForm({
    mode: 'uncontrolled',
    initialValues: {
      user: {
        firstName: '',
        lastName: '',
      },
    },

    validate: {
      user: {
        [formRootRule]: (value) =>
          value.firstName.trim().length > 0 && value.firstName === value.lastName
            ? 'First name and last name cannot be the same'
            : null,
        firstName: isNotEmpty('First name is required'),
        lastName: isNotEmpty('Last name is required'),
      },
    },
  });

  return (
    <form onSubmit={form.onSubmit(() => {})}>
      <TextInput
        label="First name"
        placeholder="First name"
        {...form.getInputProps('user.firstName')}
      />
      <TextInput
        label="Last name"
        placeholder="Last name"
        mt="md"
        {...form.getInputProps('user.lastName')}
      />
      {form.errors.user && (
        <Text c="red" mt={5} fz="sm">
          {form.errors.user}
        </Text>
      )}
      <Button type="submit" mt="lg">
        Submit
      </Button>
    </form>
  );
}

isJSONString and isNotEmptyHTML form validators

New isJSONString and isNotEmptyHTML form validators:

isNotEmptyHTML checks that form value is not an empty HTML string. Empty string, string with only HTML tags and whitespace are considered to be empty.
isJSONString checks that form value is a valid JSON string.

import { isJSONString, useForm } from '@mantine/form';

const form = useForm({
  mode: 'uncontrolled',
  initialValues: {
    json: '',
    html: '',
  },

  validate: {
    json: isJSONString('Invalid JSON string'),
    html: isNotEmptyHTML('HTML cannot be empty'),
  },
});

Popover onDismiss

Popover now supports onDismiss prop, which makes it easier to subscribe to outside clicks and escape key presses to close popover:

import { useState } from 'react';
import { Button, Popover } from '@mantine/core';

function Demo() {
  const [opened, setOpened] = useState(false);
  return (
    <Popover
      opened={opened}
      onDismiss={() => setOpened(false)}
    >
      <Popover.Target>
        <Button onClick={() => setOpened((o) => !o)}>
          Toggle popover
        </Button>
      </Popover.Target>

      <Popover.Dropdown>Dropdown</Popover.Dropdown>
    </Popover>
  );
}

MantineProvider env

MantineProvider component now supports env prop. It can be used in test environment to disable some features that might impact tests and/or make it harder to test components:

transitions that mount/unmount child component with delay
portals that render child component in a different part of the DOM

To enable test environment, set env to test:

import { MantineProvider } from '@mantine/core';

function Demo() {
  return (
    <MantineProvider env="test">
      {/* Your app here */}
    </MantineProvider>
  );
}

use-file-dialog hook

New use-file-dialog allows capturing one or more files from the user without file input element:

import { Button, Group, List } from '@mantine/core';
import { useFileDialog } from '@mantine/hooks';

function Demo() {
  const fileDialog = useFileDialog();

  const pickedFiles = Array.from(fileDialog.files || []).map((file) => (
    <List.Item key={file.name}>{file.name}</List.Item>
  ));

  return (
    <div>
      <Group>
        <Button onClick={fileDialog.open}>Pick files</Button>
        {pickedFiles.length > 0 && (
          <Button variant="default" onClick={fileDialog.reset}>
            Reset
          </Button>
        )}
      </Group>
      {pickedFiles.length > 0 && <List mt="lg">{pickedFiles}</List>}
    </div>
  );
}

Tooltip now supports customizing middlewares
ScrollArea now supports overscrollBehavior prop
Affix now supports theme.spacing values for position prop
Anchor now supports underline="not-hover" option to display underline only when the link is not hovered