# Available Rules

🔧 Indicates that the rule is fixable, and using --fix option on the command line can automatically fix some of the reported problems.
💡 Indicates that some problems reported by the rule are manually fixable by editor suggestions.
⭐ Indicates that the rule is included in the plugin:svelte/recommended config.

# Possible Errors

These rules relate to possible syntax or logic errors in Svelte code:

Rule ID	Description
svelte/infinite-reactive-loop	Svelte runtime prevents calling the same reactive statement twice in a microtask. But between different microtask, it doesn’t prevent.
svelte/no-deprecated-raw-special-elements	Recommends not using raw special elements in Svelte versions previous to 5.	🔧
svelte/no-dom-manipulating	disallow DOM manipulating
svelte/no-dupe-else-if-blocks	disallow duplicate conditions in `{#if}` / `{:else if}` chains	⭐
svelte/no-dupe-on-directives	disallow duplicate `on:` directives
svelte/no-dupe-style-properties	disallow duplicate style properties	⭐
svelte/no-dupe-use-directives	disallow duplicate `use:` directives
svelte/no-dynamic-slot-name	disallow dynamic slot name	⭐🔧
svelte/no-export-load-in-svelte-module-in-kit-pages	disallow exporting load functions in `*.svelte` module in SvelteKit page components.
svelte/no-not-function-handler	disallow use of not function in event handler	⭐
svelte/no-object-in-text-mustaches	disallow objects in text mustache interpolation	⭐
svelte/no-reactive-reassign	disallow reassigning reactive values
svelte/no-shorthand-style-property-overrides	disallow shorthand style properties that override related longhand properties	⭐
svelte/no-store-async	disallow using async/await inside svelte stores because it causes issues with the auto-unsubscribing features
svelte/no-unknown-style-directive-property	disallow unknown `style:property`	⭐
svelte/require-store-callbacks-use-set-param	store callbacks must use `set` param
svelte/require-store-reactive-access	disallow to use of the store itself as an operand. Need to use $ prefix or get function.	🔧
svelte/valid-compile	disallow warnings when compiling.	⭐
svelte/valid-prop-names-in-kit-pages	disallow props other than data or errors in SvelteKit page components.

# Security Vulnerability

These rules relate to security vulnerabilities in Svelte code:

Rule ID	Description
svelte/no-at-html-tags	disallow use of `{@html}` to prevent XSS attack	⭐
svelte/no-target-blank	disallow `target="_blank"` attribute without `rel="noopener noreferrer"`

# Best Practices

These rules relate to better ways of doing things to help you avoid problems:

Rule ID	Description
svelte/block-lang	disallows the use of languages other than those specified in the configuration for the lang attribute of `<script>` and `<style>` blocks.
svelte/button-has-type	disallow usage of button without an explicit type attribute
svelte/no-at-debug-tags	disallow the use of `{@debug}`	⭐
svelte/no-ignored-unsubscribe	disallow ignoring the unsubscribe method returned by the `subscribe()` on Svelte stores.
svelte/no-immutable-reactive-statements	disallow reactive statements that don’t reference reactive values.
svelte/no-inline-styles	disallow attributes and directives that produce inline styles
svelte/no-inspect	Warns against the use of `$inspect` directive
svelte/no-reactive-functions	it’s not necessary to define functions in reactive statements	💡
svelte/no-reactive-literals	don’t assign literal values in reactive statements	💡
svelte/no-svelte-internal	svelte/internal will be removed in Svelte 6.
svelte/no-unused-class-name	disallow the use of a class in the template without a corresponding style
svelte/no-unused-svelte-ignore	disallow unused svelte-ignore comments	⭐
svelte/no-useless-mustaches	disallow unnecessary mustache interpolations	🔧
svelte/prefer-destructured-store-props	destructure values from object stores for better change tracking & fewer redraws	💡
svelte/require-each-key	require keyed `{#each}` block
svelte/require-event-dispatcher-types	require type parameters for `createEventDispatcher`
svelte/require-optimized-style-attribute	require style attributes that can be optimized
svelte/require-stores-init	require initial value in store
svelte/valid-each-key	enforce keys to use variables defined in the `{#each}` block

# Stylistic Issues

These rules relate to style guidelines, and are therefore quite subjective:

Rule ID	Description
svelte/derived-has-same-inputs-outputs	derived store should use same variable names between values and callback
svelte/first-attribute-linebreak	enforce the location of first attribute	🔧
svelte/html-closing-bracket-new-line	Require or disallow a line break before tag’s closing brackets	🔧
svelte/html-closing-bracket-spacing	require or disallow a space before tag’s closing brackets	🔧
svelte/html-quotes	enforce quotes style of HTML attributes	🔧
svelte/html-self-closing	enforce self-closing style	🔧
svelte/indent	enforce consistent indentation	🔧
svelte/max-attributes-per-line	enforce the maximum number of attributes per line	🔧
svelte/mustache-spacing	enforce unified spacing in mustache	🔧
svelte/no-extra-reactive-curlies	disallow wrapping single reactive statements in curly braces	💡
svelte/no-restricted-html-elements	disallow specific HTML elements
svelte/no-spaces-around-equal-signs-in-attribute	disallow spaces around equal signs in attribute	🔧
svelte/prefer-class-directive	require class directives instead of ternary expressions	🔧
svelte/prefer-style-directive	require style directives instead of style attribute	🔧
svelte/shorthand-attribute	enforce use of shorthand syntax in attribute	🔧
svelte/shorthand-directive	enforce use of shorthand syntax in directives	🔧
svelte/sort-attributes	enforce order of attributes	🔧
svelte/spaced-html-comment	enforce consistent spacing after the `<!--` and before the `-->` in a HTML comment	🔧

# Extension Rules

These rules extend the rules provided by ESLint itself, or other plugins to work well in Svelte:

Rule ID	Description
svelte/no-inner-declarations	disallow variable or `function` declarations in nested blocks	⭐
svelte/no-trailing-spaces	disallow trailing whitespace at the end of lines	🔧

# SvelteKit

These rules relate to SvelteKit and its best Practices.

Rule ID	Description
svelte/no-goto-without-base	disallow using goto() without the base path

# Experimental

⚠️ These rules are considered experimental and may change or be removed in the future:

Rule ID	Description
svelte/experimental-require-slot-types	require slot type declaration using the `$$Slots` interface
svelte/experimental-require-strict-events	require the strictEvents attribute on `<script>` tags

# System

These rules relate to this plugin works:

Rule ID	Description
svelte/comment-directive	support comment-directives in HTML template	⭐
svelte/system	system rule for working this plugin	⭐

# Deprecated

⚠️ We’re going to remove deprecated rules in the next major release. Please migrate to successor/new rules.
😇 We don’t fix bugs which are in deprecated rules since we don’t have enough resources.

Rule ID	Replaced by
svelte/@typescript-eslint/no-unnecessary-condition	This rule is no longer needed when using svelte-eslint-parser>=v0.19.0.