the-forest/client/node_modules/eslint-plugin-react/lib/rules/jsx-no-undef.js

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2024-09-17 20:35:18 -04:00
/**
* @fileoverview Disallow undeclared variables in JSX
* @author Yannick Croissant
*/
'use strict';
const docsUrl = require('../util/docsUrl');
const eslintUtil = require('../util/eslint');
const jsxUtil = require('../util/jsx');
const report = require('../util/report');
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
const messages = {
undefined: '\'{{identifier}}\' is not defined.',
};
/** @type {import('eslint').Rule.RuleModule} */
module.exports = {
meta: {
docs: {
description: 'Disallow undeclared variables in JSX',
category: 'Possible Errors',
recommended: true,
url: docsUrl('jsx-no-undef'),
},
messages,
schema: [{
type: 'object',
properties: {
allowGlobals: {
type: 'boolean',
},
},
additionalProperties: false,
}],
},
create(context) {
const config = context.options[0] || {};
const allowGlobals = config.allowGlobals || false;
/**
* Compare an identifier with the variables declared in the scope
* @param {ASTNode} node - Identifier or JSXIdentifier node
* @returns {void}
*/
function checkIdentifierInJSX(node) {
let scope = eslintUtil.getScope(context, node);
const sourceCode = eslintUtil.getSourceCode(context);
const sourceType = sourceCode.ast.sourceType;
const scopeUpperBound = !allowGlobals && sourceType === 'module' ? 'module' : 'global';
let variables = scope.variables;
let i;
let len;
// Ignore 'this' keyword (also maked as JSXIdentifier when used in JSX)
if (node.name === 'this') {
return;
}
while (scope.type !== scopeUpperBound && scope.type !== 'global') {
scope = scope.upper;
variables = scope.variables.concat(variables);
}
if (scope.childScopes.length) {
variables = scope.childScopes[0].variables.concat(variables);
// Temporary fix for babel-eslint
if (scope.childScopes[0].childScopes.length) {
variables = scope.childScopes[0].childScopes[0].variables.concat(variables);
}
}
for (i = 0, len = variables.length; i < len; i++) {
if (variables[i].name === node.name) {
return;
}
}
report(context, messages.undefined, 'undefined', {
node,
data: {
identifier: node.name,
},
});
}
return {
JSXOpeningElement(node) {
switch (node.name.type) {
case 'JSXIdentifier':
if (jsxUtil.isDOMComponent(node)) {
return;
}
node = node.name;
break;
case 'JSXMemberExpression':
node = node.name;
do {
node = node.object;
} while (node && node.type !== 'JSXIdentifier');
break;
case 'JSXNamespacedName':
return;
default:
break;
}
checkIdentifierInJSX(node);
},
};
},
};