492 lines
15 KiB
JavaScript
492 lines
15 KiB
JavaScript
|
/**
|
|||
|
|
* @fileoverview Prevent creating unstable components inside components
|
|||
|
|
* @author Ari Perkkiö
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
'use strict';
|
|||
|
|
|
|||
|
|
const Components = require('../util/Components');
|
|||
|
|
const docsUrl = require('../util/docsUrl');
|
|||
|
|
const isCreateElement = require('../util/isCreateElement');
|
|||
|
|
const report = require('../util/report');
|
|||
|
|
|
|||
|
|
// ------------------------------------------------------------------------------
|
|||
|
|
// Constants
|
|||
|
|
// ------------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
const COMPONENT_AS_PROPS_INFO = ' If you want to allow component creation in props, set allowAsProps option to true.';
|
|||
|
|
const HOOK_REGEXP = /^use[A-Z0-9].*$/;
|
|||
|
|
|
|||
|
|
// ------------------------------------------------------------------------------
|
|||
|
|
// Helpers
|
|||
|
|
// ------------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Generate error message with given parent component name
|
|||
|
|
* @param {String} parentName Name of the parent component, if known
|
|||
|
|
* @returns {String} Error message with parent component name
|
|||
|
|
*/
|
|||
|
|
function generateErrorMessageWithParentName(parentName) {
|
|||
|
|
return `Do not define components during render. React will see a new component type on every render and destroy the entire subtree’s DOM nodes and state (https://reactjs.org/docs/reconciliation.html#elements-of-different-types). Instead, move this component definition out of the parent component${parentName ? ` “${parentName}” ` : ' '}and pass data as props.`;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given text starts with `render`. Comparison is case-sensitive.
|
|||
|
|
* @param {String} text Text to validate
|
|||
|
|
* @returns {Boolean}
|
|||
|
|
*/
|
|||
|
|
function startsWithRender(text) {
|
|||
|
|
return (text || '').startsWith('render');
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get closest parent matching given matcher
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @param {Context} context eslint context
|
|||
|
|
* @param {Function} matcher Method used to match the parent
|
|||
|
|
* @returns {ASTNode} The matching parent node, if any
|
|||
|
|
*/
|
|||
|
|
function getClosestMatchingParent(node, context, matcher) {
|
|||
|
|
if (!node || !node.parent || node.parent.type === 'Program') {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (matcher(node.parent, context)) {
|
|||
|
|
return node.parent;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return getClosestMatchingParent(node.parent, context, matcher);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Matcher used to check whether given node is a `createElement` call
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @param {Context} context eslint context
|
|||
|
|
* @returns {Boolean} True if node is a `createElement` call, false if not
|
|||
|
|
*/
|
|||
|
|
function isCreateElementMatcher(node, context) {
|
|||
|
|
return (
|
|||
|
|
node
|
|||
|
|
&& node.type === 'CallExpression'
|
|||
|
|
&& isCreateElement(node, context)
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Matcher used to check whether given node is a `ObjectExpression`
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is a `ObjectExpression`, false if not
|
|||
|
|
*/
|
|||
|
|
function isObjectExpressionMatcher(node) {
|
|||
|
|
return node && node.type === 'ObjectExpression';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Matcher used to check whether given node is a `JSXExpressionContainer`
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is a `JSXExpressionContainer`, false if not
|
|||
|
|
*/
|
|||
|
|
function isJSXExpressionContainerMatcher(node) {
|
|||
|
|
return node && node.type === 'JSXExpressionContainer';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Matcher used to check whether given node is a `JSXAttribute` of `JSXExpressionContainer`
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is a `JSXAttribute` of `JSXExpressionContainer`, false if not
|
|||
|
|
*/
|
|||
|
|
function isJSXAttributeOfExpressionContainerMatcher(node) {
|
|||
|
|
return (
|
|||
|
|
node
|
|||
|
|
&& node.type === 'JSXAttribute'
|
|||
|
|
&& node.value
|
|||
|
|
&& node.value.type === 'JSXExpressionContainer'
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Matcher used to check whether given node is an object `Property`
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is a `Property`, false if not
|
|||
|
|
*/
|
|||
|
|
function isPropertyOfObjectExpressionMatcher(node) {
|
|||
|
|
return (
|
|||
|
|
node
|
|||
|
|
&& node.parent
|
|||
|
|
&& node.parent.type === 'Property'
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Matcher used to check whether given node is a `CallExpression`
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is a `CallExpression`, false if not
|
|||
|
|
*/
|
|||
|
|
function isCallExpressionMatcher(node) {
|
|||
|
|
return node && node.type === 'CallExpression';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node or its parent is directly inside `map` call
|
|||
|
|
* ```jsx
|
|||
|
|
* {items.map(item => <li />)}
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is directly inside `map` call, false if not
|
|||
|
|
*/
|
|||
|
|
function isMapCall(node) {
|
|||
|
|
return (
|
|||
|
|
node
|
|||
|
|
&& node.callee
|
|||
|
|
&& node.callee.property
|
|||
|
|
&& node.callee.property.name === 'map'
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is `ReturnStatement` of a React hook
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @param {Context} context eslint context
|
|||
|
|
* @returns {Boolean} True if node is a `ReturnStatement` of a React hook, false if not
|
|||
|
|
*/
|
|||
|
|
function isReturnStatementOfHook(node, context) {
|
|||
|
|
if (
|
|||
|
|
!node
|
|||
|
|
|| !node.parent
|
|||
|
|
|| node.parent.type !== 'ReturnStatement'
|
|||
|
|
) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const callExpression = getClosestMatchingParent(node, context, isCallExpressionMatcher);
|
|||
|
|
return (
|
|||
|
|
callExpression
|
|||
|
|
&& callExpression.callee
|
|||
|
|
&& HOOK_REGEXP.test(callExpression.callee.name)
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is declared inside a render prop
|
|||
|
|
* ```jsx
|
|||
|
|
* <Component renderFooter={() => <div />} />
|
|||
|
|
* <Component>{() => <div />}</Component>
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @param {Context} context eslint context
|
|||
|
|
* @returns {Boolean} True if component is declared inside a render prop, false if not
|
|||
|
|
*/
|
|||
|
|
function isComponentInRenderProp(node, context) {
|
|||
|
|
if (
|
|||
|
|
node
|
|||
|
|
&& node.parent
|
|||
|
|
&& node.parent.type === 'Property'
|
|||
|
|
&& node.parent.key
|
|||
|
|
&& startsWithRender(node.parent.key.name)
|
|||
|
|
) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Check whether component is a render prop used as direct children, e.g. <Component>{() => <div />}</Component>
|
|||
|
|
if (
|
|||
|
|
node
|
|||
|
|
&& node.parent
|
|||
|
|
&& node.parent.type === 'JSXExpressionContainer'
|
|||
|
|
&& node.parent.parent
|
|||
|
|
&& node.parent.parent.type === 'JSXElement'
|
|||
|
|
) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const jsxExpressionContainer = getClosestMatchingParent(node, context, isJSXExpressionContainerMatcher);
|
|||
|
|
|
|||
|
|
// Check whether prop name indicates accepted patterns
|
|||
|
|
if (
|
|||
|
|
jsxExpressionContainer
|
|||
|
|
&& jsxExpressionContainer.parent
|
|||
|
|
&& jsxExpressionContainer.parent.type === 'JSXAttribute'
|
|||
|
|
&& jsxExpressionContainer.parent.name
|
|||
|
|
&& jsxExpressionContainer.parent.name.type === 'JSXIdentifier'
|
|||
|
|
) {
|
|||
|
|
const propName = jsxExpressionContainer.parent.name.name;
|
|||
|
|
|
|||
|
|
// Starts with render, e.g. <Component renderFooter={() => <div />} />
|
|||
|
|
if (startsWithRender(propName)) {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Uses children prop explicitly, e.g. <Component children={() => <div />} />
|
|||
|
|
if (propName === 'children') {
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is declared directly inside a render property
|
|||
|
|
* ```jsx
|
|||
|
|
* const rows = { render: () => <div /> }
|
|||
|
|
* <Component rows={ [{ render: () => <div /> }] } />
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if component is declared inside a render property, false if not
|
|||
|
|
*/
|
|||
|
|
function isDirectValueOfRenderProperty(node) {
|
|||
|
|
return (
|
|||
|
|
node
|
|||
|
|
&& node.parent
|
|||
|
|
&& node.parent.type === 'Property'
|
|||
|
|
&& node.parent.key
|
|||
|
|
&& node.parent.key.type === 'Identifier'
|
|||
|
|
&& startsWithRender(node.parent.key.name)
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Resolve the component name of given node
|
|||
|
|
* @param {ASTNode} node The AST node of the component
|
|||
|
|
* @returns {String} Name of the component, if any
|
|||
|
|
*/
|
|||
|
|
function resolveComponentName(node) {
|
|||
|
|
const parentName = node.id && node.id.name;
|
|||
|
|
if (parentName) return parentName;
|
|||
|
|
|
|||
|
|
return (
|
|||
|
|
node.type === 'ArrowFunctionExpression'
|
|||
|
|
&& node.parent
|
|||
|
|
&& node.parent.id
|
|||
|
|
&& node.parent.id.name
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// ------------------------------------------------------------------------------
|
|||
|
|
// Rule Definition
|
|||
|
|
// ------------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
module.exports = {
|
|||
|
|
meta: {
|
|||
|
|
docs: {
|
|||
|
|
description: 'Disallow creating unstable components inside components',
|
|||
|
|
category: 'Possible Errors',
|
|||
|
|
recommended: false,
|
|||
|
|
url: docsUrl('no-unstable-nested-components'),
|
|||
|
|
},
|
|||
|
|
schema: [{
|
|||
|
|
type: 'object',
|
|||
|
|
properties: {
|
|||
|
|
customValidators: {
|
|||
|
|
type: 'array',
|
|||
|
|
items: {
|
|||
|
|
type: 'string',
|
|||
|
|
},
|
|||
|
|
},
|
|||
|
|
allowAsProps: {
|
|||
|
|
type: 'boolean',
|
|||
|
|
},
|
|||
|
|
},
|
|||
|
|
additionalProperties: false,
|
|||
|
|
}],
|
|||
|
|
},
|
|||
|
|
|
|||
|
|
create: Components.detect((context, components, utils) => {
|
|||
|
|
const allowAsProps = context.options.some((option) => option && option.allowAsProps);
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is declared inside class component's render block
|
|||
|
|
* ```jsx
|
|||
|
|
* class Component extends React.Component {
|
|||
|
|
* render() {
|
|||
|
|
* class NestedClassComponent extends React.Component {
|
|||
|
|
* ...
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node being checked
|
|||
|
|
* @returns {Boolean} True if node is inside class component's render block, false if not
|
|||
|
|
*/
|
|||
|
|
function isInsideRenderMethod(node) {
|
|||
|
|
const parentComponent = utils.getParentComponent();
|
|||
|
|
|
|||
|
|
if (!parentComponent || parentComponent.type !== 'ClassDeclaration') {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return (
|
|||
|
|
node
|
|||
|
|
&& node.parent
|
|||
|
|
&& node.parent.type === 'MethodDefinition'
|
|||
|
|
&& node.parent.key
|
|||
|
|
&& node.parent.key.name === 'render'
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is a function component declared inside class component.
|
|||
|
|
* Util's component detection fails to detect function components inside class components.
|
|||
|
|
* ```jsx
|
|||
|
|
* class Component extends React.Component {
|
|||
|
|
* render() {
|
|||
|
|
* const NestedComponent = () => <div />;
|
|||
|
|
* ...
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node being checked
|
|||
|
|
* @returns {Boolean} True if given node a function component declared inside class component, false if not
|
|||
|
|
*/
|
|||
|
|
function isFunctionComponentInsideClassComponent(node) {
|
|||
|
|
const parentComponent = utils.getParentComponent();
|
|||
|
|
const parentStatelessComponent = utils.getParentStatelessComponent();
|
|||
|
|
|
|||
|
|
return (
|
|||
|
|
parentComponent
|
|||
|
|
&& parentStatelessComponent
|
|||
|
|
&& parentComponent.type === 'ClassDeclaration'
|
|||
|
|
&& utils.getStatelessComponent(parentStatelessComponent)
|
|||
|
|
&& utils.isReturningJSX(node)
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is declared inside `createElement` call's props
|
|||
|
|
* ```js
|
|||
|
|
* React.createElement(Component, {
|
|||
|
|
* footer: () => React.createElement("div", null)
|
|||
|
|
* })
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node
|
|||
|
|
* @returns {Boolean} True if node is declare inside `createElement` call's props, false if not
|
|||
|
|
*/
|
|||
|
|
function isComponentInsideCreateElementsProp(node) {
|
|||
|
|
if (!components.get(node)) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const createElementParent = getClosestMatchingParent(node, context, isCreateElementMatcher);
|
|||
|
|
|
|||
|
|
return (
|
|||
|
|
createElementParent
|
|||
|
|
&& createElementParent.arguments
|
|||
|
|
&& createElementParent.arguments[1] === getClosestMatchingParent(node, context, isObjectExpressionMatcher)
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is declared inside a component/object prop.
|
|||
|
|
* ```jsx
|
|||
|
|
* <Component footer={() => <div />} />
|
|||
|
|
* { footer: () => <div /> }
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node being checked
|
|||
|
|
* @returns {Boolean} True if node is a component declared inside prop, false if not
|
|||
|
|
*/
|
|||
|
|
function isComponentInProp(node) {
|
|||
|
|
if (isPropertyOfObjectExpressionMatcher(node)) {
|
|||
|
|
return utils.isReturningJSX(node);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const jsxAttribute = getClosestMatchingParent(node, context, isJSXAttributeOfExpressionContainerMatcher);
|
|||
|
|
|
|||
|
|
if (!jsxAttribute) {
|
|||
|
|
return isComponentInsideCreateElementsProp(node);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return utils.isReturningJSX(node);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is a stateless component returning non-JSX
|
|||
|
|
* ```jsx
|
|||
|
|
* {{ a: () => null }}
|
|||
|
|
* ```
|
|||
|
|
* @param {ASTNode} node The AST node being checked
|
|||
|
|
* @returns {Boolean} True if node is a stateless component returning non-JSX, false if not
|
|||
|
|
*/
|
|||
|
|
function isStatelessComponentReturningNull(node) {
|
|||
|
|
const component = utils.getStatelessComponent(node);
|
|||
|
|
|
|||
|
|
return component && !utils.isReturningJSX(component);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Check whether given node is a unstable nested component
|
|||
|
|
* @param {ASTNode} node The AST node being checked
|
|||
|
|
*/
|
|||
|
|
function validate(node) {
|
|||
|
|
if (!node || !node.parent) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
const isDeclaredInsideProps = isComponentInProp(node);
|
|||
|
|
|
|||
|
|
if (
|
|||
|
|
!components.get(node)
|
|||
|
|
&& !isFunctionComponentInsideClassComponent(node)
|
|||
|
|
&& !isDeclaredInsideProps) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (
|
|||
|
|
// Support allowAsProps option
|
|||
|
|
(isDeclaredInsideProps && (allowAsProps || isComponentInRenderProp(node, context)))
|
|||
|
|
|
|||
|
|
// Prevent reporting components created inside Array.map calls
|
|||
|
|
|| isMapCall(node)
|
|||
|
|
|| isMapCall(node.parent)
|
|||
|
|
|
|||
|
|
// Do not mark components declared inside hooks (or falsy '() => null' clean-up methods)
|
|||
|
|
|| isReturnStatementOfHook(node, context)
|
|||
|
|
|
|||
|
|
// Do not mark objects containing render methods
|
|||
|
|
|| isDirectValueOfRenderProperty(node)
|
|||
|
|
|
|||
|
|
// Prevent reporting nested class components twice
|
|||
|
|
|| isInsideRenderMethod(node)
|
|||
|
|
|
|||
|
|
// Prevent falsely reporting detected "components" which do not return JSX
|
|||
|
|
|| isStatelessComponentReturningNull(node)
|
|||
|
|
) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Get the closest parent component
|
|||
|
|
const parentComponent = getClosestMatchingParent(
|
|||
|
|
node,
|
|||
|
|
context,
|
|||
|
|
(nodeToMatch) => components.get(nodeToMatch)
|
|||
|
|
);
|
|||
|
|
|
|||
|
|
if (parentComponent) {
|
|||
|
|
const parentName = resolveComponentName(parentComponent);
|
|||
|
|
|
|||
|
|
// Exclude lowercase parents, e.g. function createTestComponent()
|
|||
|
|
// React-dom prevents creating lowercase components
|
|||
|
|
if (parentName && parentName[0] === parentName[0].toLowerCase()) {
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
let message = generateErrorMessageWithParentName(parentName);
|
|||
|
|
|
|||
|
|
// Add information about allowAsProps option when component is declared inside prop
|
|||
|
|
if (isDeclaredInsideProps && !allowAsProps) {
|
|||
|
|
message += COMPONENT_AS_PROPS_INFO;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
report(context, message, null, {
|
|||
|
|
node,
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// --------------------------------------------------------------------------
|
|||
|
|
// Public
|
|||
|
|
// --------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
return {
|
|||
|
|
FunctionDeclaration(node) { validate(node); },
|
|||
|
|
ArrowFunctionExpression(node) { validate(node); },
|
|||
|
|
FunctionExpression(node) { validate(node); },
|
|||
|
|
ClassDeclaration(node) { validate(node); },
|
|||
|
|
CallExpression(node) { validate(node); },
|
|||
|
|
};
|
|||
|
|
}),
|
|||
|
|
};
|