JSON Rules

import { Icon } from "@astrojs/starlight/components";

Below the list of rules supported by Biome, divided by group. Here's a legend of the emojis:

• The icon <span class='inline-icon' title="This rule is recommended"><Icon name="approve-check-circle" label="This rule is recommended" /></span> indicates that the rule is part of the recommended rules.
• The icon <span class='inline-icon' title="This rule has a safe fix"><Icon name="seti:config" label="The rule has a safe fix" /></span> indicates that the rule provides a code action (fix) that is safe to apply.
• The icon <span class='inline-icon' title="This rule has an unsafe fix"><Icon name="warning" label="The rule has an unsafe fix" /></span> indicates that the rule provides a code action (fix) that is unsafe to apply.
• The icon <span class='inline-icon' title="This rule is not released yet"><Icon name="moon" label="This rule is not released yet" /></span> indicates that the rule has been implemented and scheduled for the next release.

nursery

Rule name	Description	Properties
noEmptyObjectKeys	Disallow empty keys in JSON objects.	<span class='inline-icon' title="This rule is not released yet"><Icon name="moon" label="This rule is not released yet" size="1.2rem" /></span>
noTopLevelLiterals	Require the JSON top-level value to be an array or object.	<span class='inline-icon' title="This rule is not released yet"><Icon name="moon" label="This rule is not released yet" size="1.2rem" /></span>
useRequiredScripts	Enforce the presence of required scripts in package.json.

suspicious

Rule name	Description	Properties
noBiomeFirstException	Prevents the misuse of glob patterns inside the files.includes field.	<span class='inline-icon' title="This rule is recommended" ><Icon name="approve-check-circle" size="1.2rem" label="This rule is recommended" /></span><span class='inline-icon' title='The rule has a safe fix.'><Icon name="seti:config" label="The rule has a safe fix" size="1.2rem" /></span>
noDuplicateDependencies	Prevent the listing of duplicate dependencies.
noDuplicateObjectKeys	Disallow two keys with the same name inside objects.	<span class='inline-icon' title="This rule is recommended" ><Icon name="approve-check-circle" size="1.2rem" label="This rule is recommended" /></span>
noQuickfixBiome	Disallow the use if quickfix.biome inside editor settings file.	<span class='inline-icon' title="This rule is recommended" ><Icon name="approve-check-circle" size="1.2rem" label="This rule is recommended" /></span><span class='inline-icon' title='The rule has a safe fix.'><Icon name="seti:config" label="The rule has a safe fix" size="1.2rem" /></span>
useBiomeIgnoreFolder	Promotes the correct usage for ignoring folders in the configuration file.	<span class='inline-icon' title="This rule is recommended" ><Icon name="approve-check-circle" size="1.2rem" label="This rule is recommended" /></span><span class='inline-icon' title='The rule has a safe fix.'><Icon name="seti:config" label="The rule has a safe fix" size="1.2rem" /></span>

Recommended rules

• noBiomeFirstException (Severity: error)
• noDuplicateObjectKeys (Severity: error)
• noQuickfixBiome (Severity: information)
• useBiomeIgnoreFolder (Severity: warning)

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