eslint-plugin-react-intl-sammy
v1.4.2
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Linter for React-Intl integration
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@calm/eslint-plugin-react-intl
This is a plugin to ensure that Intl translations are being made correctly with react-intl. Since they should be stored in an object for translation, this disables plain text between html tags.
The plugin is actively supported by the Calm engineering team, and contributions/concerns are welcome at https://github.com/calm/eslint-plugin-react-intl.
There are three options to enable, and we recommend enabling all of them to ensure proper translations in all languages.
The { noTrailingWhitespace: true } option is set by default and is not necessary to declare in the rules section.
This is recommended as some languages don't have spaces between words.
Additionally, the option ignoreLinks
is set to true by default. Depending on your
use case, you may want to disable this.
Use Cases
Formatted Message validation
- Checks to make sure plain text doesn't exist within html tags (should be translated)
<a>
tags by default are not checked (this can be disabled)- Numbers are ignored (they're the same in every language)
- Trailing whitespace is not allowed (this can be disabled)
- Non-alphanumeric values are ignored (such as
-
) - Can enable enforcing label, aria-label attributes being translated (
<track label="subtitles" />
) - Can enable enforcing alt attributes being translated (
<img alt="description" />
) - Can enable enforcing inputProps being translated (
<Checkbox value="checkedA" inputProps={{ 'aria-label': 'Checkbox A' }} />
)- This is specific to some React libraries, such as MaterialUI
- Example can be seen here: https://material-ui.com/components/checkboxes/#accessibility
Missing Values validation
- In defaultMessage attributes within components,
{variable}
declarations must be declared in thevalues
attribute - It will look over anything before a comma, allowing for FormatJS plurals
- Ex. defaultMessage="{number} {number, plural, one {Day} other {Days}}" will resolve 1 variable as
number
- Ex. defaultMessage="{number} {number, plural, one {Day} other {Days}}" will resolve 1 variable as
Missing Attribute validation
- components must have both
defaultMessage
andid
attributes set- Calm chooses to always require these, but you can optionally disable defaultMessage with option
requireDefaultMessage : false
- Calm chooses to always require these, but you can optionally disable defaultMessage with option
defaultMessage
andid
attributes cannot be empty- Spread operator by default is not allowed
- Spread operator can't be evaluated by eslint's AST, so translations can't be guaranteed
requireDescription
can optionally be set to require that all translations contain the description attribute- Use the
formatDefineMessages: true
option in order to also check the defineMessages declaration from react-intl- BE CAREFUL - This assumes that defineMessages will always mean the react-intl method, so do not declare other defineMessages functions unless they maintain the same formatting as react-intl
- Optional
requireIdAsString: false
will allow for variables in the id field- BE CAREFUL - variables in id fields can result in duplicate strings being translated, as well as the possibility of a changed variable leading to an id without a translation associated with it
Installation
You'll first need to install ESLint:
$ npm i eslint --save-dev
Next, install @calm/eslint-plugin-react-intl
:
$ npm install @calm/eslint-plugin-react-intl --save-dev
Note: If you installed ESLint globally (using the -g
flag) then you must also install @calm/eslint-plugin-react-intl
globally.
Usage
Add @calm/react-intl
to the plugins section of your .eslintrc
configuration file. You can omit the eslint-plugin-
prefix:
{
"plugins": [
"@calm/react-intl"
]
}
Then configure the rules you want to use under the rules section. It's recommended that you explicitly set each option. The rules (with their default settings) are listed below.
{
"rules": {
"@calm/react-intl/missing-formatted-message": [2,
{
"noTrailingWhitespace": true,
"ignoreLinks": true,
"enforceLabels": false,
"enforceImageAlts": false,
"enforceInputProps": false
}
],
"@calm/react-intl/missing-attribute": [2,
{
"noTrailingWhitespace": true,
"noSpreadOperator": true,
"requireDescription": false,
"formatDefineMessages": false,
"requireIdAsString": true,
"requireDefaultMessage": true,
}
],
"@calm/react-intl/missing-values": 2
}
}
Supported Rules
- missing-formatted-message
- missing-attribute
- missing-values