1.0.0 • Public • Published

    Upgrade react-intl from v2 to v4

    Codemods to migrate react-intl from v2 to v4.

    Never heard of codemods? Here is a quick summary from facebook/codemod:

    codemod is a tool/library to assist you with large-scale codebase refactors that can be partially automated but still require human oversight and occasional intervention.

    How to use

    # installing globally
    npm install -g @quintoandar/react-intl-v2-to-v4
    # starting the interactive prompt
    # running a specific transform with glob and custom options
    react-intl-v2-to-v4 'src/**/*.test.js' migrateGetChildContext --dry
    # passing jscodeshift options
    # learn more at https://github.com/facebook/jscodeshift#usage-cli
    react-intl-v2-to-v4 . migrateIntlShape --jscodeshift="--run-in-band"
    # passing recast options
    # useful for formatting configuration (tab size, quotes, trailing comma etc.)
    # learn more at https://github.com/benjamn/recast/blob/822b013218a583c555bcf754beddfc52371b4a58/lib/options.ts
    react-intl-v2-to-v4 . migrateIntlShape --jscodeshift="--printOptions='{\"quote\":\"double\"}'"
    # or using npx
    npx @quintoandar/react-intl-v2-to-v4

    Use react-intl-v2-to-v4 --help to see the CLI commands or refer to the help file.


    Migrate intlShape prop type (migrateIntlShape)

    Remove the deprecated intlShape import and replace its occurrences with PropType.object. It automatically adds import PropTypes from 'prop-types' if necessary.

    import React from 'react';
    + import PropTypes from 'prop-types';
    - import { injectIntl, intlShape } from 'react-intl';
    + import { injectIntl } from 'react-intl';
    // ...
    Component.propTypes = {
      foo: PropTypes.bool,
    -  intl: intlShape.isRequired,
    +  intl: PropTypes.object.isRequired,

    Note: if you are using named imports from prop-types, you will get a duplicate import

    import React from 'react';
    import { bool, string } from 'prop-types';
    + import PropTypes from 'prop-types';
    - import { injectIntl, intlShape } from 'react-intl';
    + import { injectIntl } from 'react-intl';

    Linting with a no-duplicate-imports rule will catch these cases.

    Migrate injectIntl withRef option (migrateInjectIntlWithRef)

    Replace the deprecated withRef option with forwarRef.

    import { injectIntl } from 'react-intl';
    // ...
    - export default injectIntl(MyComponent, { withRef: true });
    + export default injectIntl(MyComponent, { forwardRef: true });

    Note: any change related to migrating to the React > 16.3 ref API must be done manually.

    Migrate getChildContext (migrateGetChildContext)

    This transform searches speciffically for this pattern:

    const intlProvider = new IntlProvider({ locale: 'en', defaultLocale: 'en' }, {}); // IntlProvider arguments don't matter
    const { intl } = intlProvider.getChildContext();

    and replaces intlProvider.getChildContext with createIntl:

    import React from 'react';
    - import { IntlProvider } from 'react-intl';
    + import { createIntl, createIntlCache } from 'react-intl';
    - const intlProvider = new IntlProvider({ locale: 'en', defaultLocale: 'en' }, {});
    - const { intl } = intlProvider.getChildContext();
    + const intlCache = createIntlCache();
    + const intl = createIntl({
    +   locale: 'en-US',
    +   defaultLocale: 'en-US',
    + }, intlCache);

    Migrate injectIntl HOC to useIntl hook (partial) (migrateInjectIntlToUseIntl)

    Replace the injectIntl import with useIntl and remove injectIntl calls by returning WrappedComponent directly.

    import React from 'react';
    - import { injectIntl } from 'react-intl';
    + import { useIntl } from 'react-intl';
    const WrappedComponent = () => {
      return <div />;
    - export default injectIntl(WrappedComponent);
    + export default WrappedComponent;

    You will have to manually add the useIntl hook to your component:

    import React from 'react';
    import { useIntl } from 'react-intl';
    const WrappedComponent = () => {
    +  const intl = useIntl();
      return <div />;
    export default WrappedComponent;

    If you are composing multiple high-order components using something like recompose, you will have to remove injectIntl manually:

    export default compose(
      connect(mapStateToProps, mapDispatchToProps),
    -  injectIntl,

    Unsupported changes

    These codemods do not automate all required changes to upgrade from v2 or v3 to v4. It is necessary to do some manual work as described by the lists up next. Some of these tasks should be simple, like removing addLocaleData, a method most likely to be used only once per project, so a codemod would not save that much time.

    • [v3] (optional) Keep <span> as default textComponent
    • [v3] Remove addLocaleData/ReactIntlLocaleData and include Intl.PluralRules and Intl.RelativeTimeFormat polyfills
    • [v3] Migrate FormattedRelative/formatRelative to new FormattedRelativeTime/formatRelativeTime API
    • [v3] Update FormattedMessage/formatMessage rich text formatting
    • [v3] Use apostrophe (') instead of backslash (/) as escape character in messages
    • [v3] Remove dash (-) from {placeholder-variables}
    • [v3] Support ESM in build toolchain
    • [v4] Migrate FormattedHTMLMessage/formatHTMLMessage to FormattedMessage/formatMessage with rich text

    For more information, see the official guides:


    The implementation of this tool is based on other open-source libraries, so check out their documentation:


    Unit tests are written with Jest and jscodeshift testing utilities.

    Important: if you are writting a test case where the file should not be changed, the expected output fixture must be empty!


    Creating a release on GitHub automatically publishes a new version on npm.


    npm i @quintoandar/react-intl-v2-to-v4

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