yannickcr/eslint-plugin-react

Similar blocks of code found in 2 locations. Consider refactoring.
Open

function testUpperCase(char) {
  const upperCase = char.toUpperCase();
  return char === upperCase && upperCase !== char.toLowerCase();
}

Found in lib/rules/jsx-pascal-case.js and 1 other location - About 30 mins to fix

Read up
Read up

lib/rules/jsx-pascal-case.js on lines 24..27

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 45.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Don't Repeat Yourself on the C2 Wiki
Duplicated Code on SourceMaking
Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76

Avoid too many `return` statements within this function.
Open

          return;

Found in lib/rules/no-unknown-property.js - About 30 mins to fix

Avoid too many `return` statements within this function.
Open

          return;

Found in lib/rules/no-unknown-property.js - About 30 mins to fix

Avoid too many `return` statements within this function.
Open

          return prev;

Found in lib/rules/sort-prop-types.js - About 30 mins to fix

Similar blocks of code found in 2 locations. Consider refactoring.
Open

      if (node.parent.type === 'MemberExpression' && node.parent.parent
        && node.parent.parent.type === 'AssignmentExpression') {

Found in lib/util/defaultProps.js and 1 other location - About 30 mins to fix

Read up
Read up

lib/util/Components.js on lines 374..376

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 45.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Don't Repeat Yourself on the C2 Wiki
Duplicated Code on SourceMaking
Refactoring: Improving the Design of Existing Code by Martin Fowler. Duplicated Code, p76

Function `isSuperTypeParameterPropsDeclaration` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function isSuperTypeParameterPropsDeclaration(node) {
  if (node && (node.type === 'ClassDeclaration' || node.type === 'ClassExpression')) {
    if (node.superTypeParameters && node.superTypeParameters.params.length > 0) {
      return true;
    }

Found in lib/util/propTypes.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `create` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  create(context) {
    const configuration = context.options[0] || 'always';

    return {
      ObjectExpression(node) {

Found in lib/rules/prefer-es6-class.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `isPropTypesDeclaration` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function isPropTypesDeclaration(node) {
  if (node && (node.type === 'ClassProperty' || node.type === 'PropertyDefinition')) {
    // Flow support
    if (node.typeAnnotation && node.key.name === 'props') {
      return true;

Found in lib/util/props.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `iterateProperties` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function iterateProperties(context, properties, fn, handleSpreadFn) {
  if (properties && properties.length && typeof fn === 'function') {
    for (let i = 0, j = properties.length; i < j; i++) {
      const node = properties[i];
      const key = astUtil.getKeyValue(context, node);

Found in lib/util/propTypes.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `isAnnotatedFunctionPropsDeclaration` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function isAnnotatedFunctionPropsDeclaration(node, context) {
  if (!node || !node.params || !node.params.length) {
    return false;
  }

Found in lib/util/annotations.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `isCreateContext` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

module.exports = function isCreateContext(node) {
  if (
    node.init
    && node.init.type === 'CallExpression'
    && node.init.callee

Found in lib/util/isCreateContext.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `traverseReturns` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function traverseReturns(ASTNode, context, onReturn) {
  const nodeType = ASTNode.type;

  if (nodeType === 'ReturnStatement') {
    onReturn(ASTNode.argument, () => {});

Found in lib/util/ast.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `create` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  create(context) {
    const option = context.options[0] || 'always';
    return {
      'ClassProperty, PropertyDefinition'(node) {
        if (

Found in lib/rules/state-in-constructor.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `create` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  create: Components.detect((context, components, utils) => {
    const configuration = context.options[0] || {};
    const ignoreStateless = configuration.ignoreStateless || false;

    /**

Found in lib/rules/no-multi-comp.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `getMethodsOrder` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function getMethodsOrder(userConfig) {
  userConfig = userConfig || {};

  const groups = Object.assign({}, defaultConfig.groups, userConfig.groups);
  const order = userConfig.order || defaultConfig.order;

Found in lib/rules/sort-comp.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading

Function `testAllCaps` has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function testAllCaps(name) {
  const firstChar = name.charAt(0);
  if (!(testUpperCase(firstChar) || testDigit(firstChar))) {
    return false;
  }

Found in lib/rules/jsx-pascal-case.js - About 25 mins to fix

Read up
Read up

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
Code is considered more complex for each "break in the linear flow of the code"
Code is considered more complex when "flow breaking structures are nested"

Further reading