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React Alert Component

Alert

Markdown ChatGPT Claude

React alert component gives contextual feedback information for common user operations. The alert component is delivered with a bunch of usable and adjustable alert messages.

Available in Other JavaScript Frameworks

CoreUI React Alert Component is also available for Angular, Bootstrap, and Vue. Explore framework-specific implementations below:

On this page

How to use React Alert Component.

React Alert is prepared for any length of text, as well as an optional close button. For a styling, use one of the required contextual color props (e.g., primary). For inline dismissal, use the dismissing prop.

import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertExample = () => {
  return (
    <>
      <CAlert color="primary">A simple primary alert—check it out!</CAlert>
      <CAlert color="secondary">A simple secondary alert—check it out!</CAlert>
      <CAlert color="success">A simple success alert—check it out!</CAlert>
      <CAlert color="danger">A simple danger alert—check it out!</CAlert>
      <CAlert color="warning">A simple warning alert—check it out!</CAlert>
      <CAlert color="info">A simple info alert—check it out!</CAlert>
      <CAlert color="light">A simple light alert—check it out!</CAlert>
      <CAlert color="dark">A simple dark alert—check it out!</CAlert>
    </>
  )
}
import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertExample = () => {
  return (
    <>
      <CAlert color="primary">A simple primary alert—check it out!</CAlert>
      <CAlert color="secondary">A simple secondary alert—check it out!</CAlert>
      <CAlert color="success">A simple success alert—check it out!</CAlert>
      <CAlert color="danger">A simple danger alert—check it out!</CAlert>
      <CAlert color="warning">A simple warning alert—check it out!</CAlert>
      <CAlert color="info">A simple info alert—check it out!</CAlert>
      <CAlert color="light">A simple light alert—check it out!</CAlert>
      <CAlert color="dark">A simple dark alert—check it out!</CAlert>
    </>
  )
}

Using color to add meaning only provides a visual indication, which will not be conveyed to users of assistive technologies – such as screen readers. Please ensure that information denoted by the color is either obvious from the content itself (e.g. the visible text), or is included through alternative means, such as additional text hidden with the .visually-hidden class.

Live example

Click the button below to show an alert (hidden with inline styles to start), then dismiss (and destroy) it with the built-in close button.

import React, { useState } from 'react'
import { CAlert, CButton } from '@coreui/react'

export const AlertLiveExample = () => {
  const [visible, setVisible] = useState(false)
  return (
    <>
      <CAlert color="primary" dismissible visible={visible} onClose={() => setVisible(false)}>
        A simple primary alert—check it out!
      </CAlert>
      <CButton color="primary" onClick={() => setVisible(true)}>
        Show live alert
      </CButton>
    </>
  )
}
import React, { useState } from 'react'
import { CAlert, CButton } from '@coreui/react'

export const AlertLiveExample = () => {
  const [visible, setVisible] = useState(false)
  return (
    <>
      <CAlert color="primary" dismissible visible={visible} onClose={() => setVisible(false)}>
        A simple primary alert—check it out!
      </CAlert>
      <CButton color="primary" onClick={() => setVisible(true)}>
        Show live alert
      </CButton>
    </>
  )
}

Use the <CAlertLink> component to immediately give matching colored links inside any react alert component.

import React from 'react'
import { CAlert, CAlertLink } from '@coreui/react'

export const AlertLinkColorExample = () => {
  return (
    <>
      <CAlert color="primary">
        A simple primary alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="secondary">
        A simple secondary alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="success">
        A simple success alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="danger">
        A simple danger alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="warning">
        A simple warning alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="info">
        A simple info alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a click
        if you like.
      </CAlert>
      <CAlert color="light">
        A simple light alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a click
        if you like.
      </CAlert>
      <CAlert color="dark">
        A simple dark alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a click
        if you like.
      </CAlert>
    </>
  )
}
import React from 'react'
import { CAlert, CAlertLink } from '@coreui/react'

export const AlertLinkColorExample = () => {
  return (
    <>
      <CAlert color="primary">
        A simple primary alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="secondary">
        A simple secondary alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="success">
        A simple success alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="danger">
        A simple danger alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="warning">
        A simple warning alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a
        click if you like.
      </CAlert>
      <CAlert color="info">
        A simple info alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a click
        if you like.
      </CAlert>
      <CAlert color="light">
        A simple light alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a click
        if you like.
      </CAlert>
      <CAlert color="dark">
        A simple dark alert with <CAlertLink href="#">an example link</CAlertLink>. Give it a click
        if you like.
      </CAlert>
    </>
  )
}

Additional content

React Alert can also incorporate supplementary components & elements like heading, paragraph, and divider.

import React from 'react'
import { CAlert, CAlertHeading } from '@coreui/react'

export const AlertAdditionalContentExample = () => {
  return (
    <CAlert color="success">
      <CAlertHeading as="h4">Well done!</CAlertHeading>
      <p>
        Aww yeah, you successfully read this important alert message. This example text is going to
        run a bit longer so that you can see how spacing within an alert works with this kind of
        content.
      </p>
      <hr />
      <p className="mb-0">
        Whenever you need to, be sure to use margin utilities to keep things nice and tidy.
      </p>
    </CAlert>
  )
}
import React from 'react'
import { CAlert, CAlertHeading } from '@coreui/react'

export const AlertAdditionalContentExample = () => {
  return (
    <CAlert color="success">
      <CAlertHeading as="h4">Well done!</CAlertHeading>
      <p>
        Aww yeah, you successfully read this important alert message. This example text is going to
        run a bit longer so that you can see how spacing within an alert works with this kind of
        content.
      </p>
      <hr />
      <p className="mb-0">
        Whenever you need to, be sure to use margin utilities to keep things nice and tidy.
      </p>
    </CAlert>
  )
}

Icons

Similarly, you can use flexbox utilities and CoreUI Icons to create react alerts with icons. Depending on your icons and content, you may want to add more utilities or custom styles.

import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertIcons1Example = () => {
  return (
    <CAlert color="primary" className="d-flex align-items-center">
      <svg className="flex-shrink-0 me-2" width="24" height="24" viewBox="0 0 512 512">
        <rect
          width="32"
          height="176"
          x="240"
          y="176"
          fill="var(--ci-primary-color, currentColor)"
          className="ci-primary"
        ></rect>
        <rect
          width="32"
          height="32"
          x="240"
          y="384"
          fill="var(--ci-primary-color, currentColor)"
          className="ci-primary"
        ></rect>
        <path
          fill="var(--ci-primary-color, currentColor)"
          d="M274.014,16H237.986L16,445.174V496H496V445.174ZM464,464H48V452.959L256,50.826,464,452.959Z"
          className="ci-primary"
        ></path>
      </svg>
      <div>An example alert with an icon</div>
    </CAlert>
  )
}
import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertIcons1Example = () => {
  return (
    <CAlert color="primary" className="d-flex align-items-center">
      <svg className="flex-shrink-0 me-2" width="24" height="24" viewBox="0 0 512 512">
        <rect
          width="32"
          height="176"
          x="240"
          y="176"
          fill="var(--ci-primary-color, currentColor)"
          className="ci-primary"
        ></rect>
        <rect
          width="32"
          height="32"
          x="240"
          y="384"
          fill="var(--ci-primary-color, currentColor)"
          className="ci-primary"
        ></rect>
        <path
          fill="var(--ci-primary-color, currentColor)"
          d="M274.014,16H237.986L16,445.174V496H496V445.174ZM464,464H48V452.959L256,50.826,464,452.959Z"
          className="ci-primary"
        ></path>
      </svg>
      <div>An example alert with an icon</div>
    </CAlert>
  )
}

Need more than one icon for your react alerts? Consider using CoreUI Icons.

import React from 'react'
import { CAlert } from '@coreui/react'
import CIcon from '@coreui/icons-react'
import { cilBurn, cilCheckCircle, cilInfo, cilWarning } from '@coreui/icons'

export const AlertIcons2Example = () => {
  return (
    <>
      <CAlert color="primary" className="d-flex align-items-center">
        <CIcon icon={cilInfo} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example alert with an icon</div>
      </CAlert>
      <CAlert color="success" className="d-flex align-items-center">
        <CIcon icon={cilCheckCircle} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example success alert with an icon</div>
      </CAlert>
      <CAlert color="warning" className="d-flex align-items-center">
        <CIcon icon={cilWarning} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example warning alert with an icon</div>
      </CAlert>
      <CAlert color="danger" className="d-flex align-items-center">
        <CIcon icon={cilBurn} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example danger alert with an icon</div>
      </CAlert>
    </>
  )
}
import React from 'react'
import { CAlert } from '@coreui/react'
import CIcon from '@coreui/icons-react'
import { cilBurn, cilCheckCircle, cilInfo, cilWarning } from '@coreui/icons'

export const AlertIcons2Example = () => {
  return (
    <>
      <CAlert color="primary" className="d-flex align-items-center">
        <CIcon icon={cilInfo} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example alert with an icon</div>
      </CAlert>
      <CAlert color="success" className="d-flex align-items-center">
        <CIcon icon={cilCheckCircle} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example success alert with an icon</div>
      </CAlert>
      <CAlert color="warning" className="d-flex align-items-center">
        <CIcon icon={cilWarning} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example warning alert with an icon</div>
      </CAlert>
      <CAlert color="danger" className="d-flex align-items-center">
        <CIcon icon={cilBurn} className="flex-shrink-0 me-2" width={24} height={24} />
        <div>An example danger alert with an icon</div>
      </CAlert>
    </>
  )
}

Solid

Use variant="solid" to change contextual colors to solid.

import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertSolidExample = () => {
  return (
    <>
      <CAlert color="primary" variant="solid">
        A simple solid primary alert—check it out!
      </CAlert>
      <CAlert color="secondary" variant="solid">
        A simple solid secondary alert—check it out!
      </CAlert>
      <CAlert color="success" variant="solid">
        A simple solid success alert—check it out!
      </CAlert>
      <CAlert color="danger" variant="solid">
        A simple solid danger alert—check it out!
      </CAlert>
      <CAlert color="warning" variant="solid">
        A simple solid warning alert—check it out!
      </CAlert>
      <CAlert color="info" variant="solid">
        A simple solid info alert—check it out!
      </CAlert>
      <CAlert color="light" variant="solid" className="text-high-emphasis">
        A simple solid light alert—check it out!
      </CAlert>
      <CAlert color="dark" variant="solid">
        A simple solid dark alert—check it out!
      </CAlert>
    </>
  )
}
import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertSolidExample = () => {
  return (
    <>
      <CAlert color="primary" variant="solid">
        A simple solid primary alert—check it out!
      </CAlert>
      <CAlert color="secondary" variant="solid">
        A simple solid secondary alert—check it out!
      </CAlert>
      <CAlert color="success" variant="solid">
        A simple solid success alert—check it out!
      </CAlert>
      <CAlert color="danger" variant="solid">
        A simple solid danger alert—check it out!
      </CAlert>
      <CAlert color="warning" variant="solid">
        A simple solid warning alert—check it out!
      </CAlert>
      <CAlert color="info" variant="solid">
        A simple solid info alert—check it out!
      </CAlert>
      <CAlert color="light" variant="solid" className="text-high-emphasis">
        A simple solid light alert—check it out!
      </CAlert>
      <CAlert color="dark" variant="solid">
        A simple solid dark alert—check it out!
      </CAlert>
    </>
  )
}

Dismissing

React Alert component can also be easily dismissed. Just add the dismissible prop.

import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertDismissingExample = () => {
  return (
    <CAlert
      color="warning"
      dismissible
      onClose={() => {
        alert('👋 Well, hi there! Thanks for dismissing me.')
      }}
    >
      <strong>Go right ahead</strong> and click that dimiss over there on the right.
    </CAlert>
  )
}
import React from 'react'
import { CAlert } from '@coreui/react'

export const AlertDismissingExample = () => {
  return (
    <CAlert
      color="warning"
      dismissible
      onClose={() => {
        alert('👋 Well, hi there! Thanks for dismissing me.')
      }}
    >
      <strong>Go right ahead</strong> and click that dimiss over there on the right.
    </CAlert>
  )
}

When an alert is dismissed, the element is completely removed from the page structure. If a keyboard user dismisses the alert using the close button, their focus will suddenly be lost and, depending on the browser, reset to the start of the page/document.

API

Check out the documentation below for a comprehensive guide to all the props you can use with the components mentioned here.