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

    const call =
      state.call ||
      t.callExpression(
        path.node.children.length > 1 ? state.jsxStaticCallee : state.jsxCallee,
        args,
Severity: Minor
Found in packages/babel-helper-builder-react-jsx-experimental/src/index.js and 1 other location - About 55 mins to fix
packages/babel-helper-builder-react-jsx-experimental/src/index.js on lines 702..707

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 54.

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

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

    const call =
      state.call ||
      t.callExpression(
        path.node.children.length > 1 ? state.jsxStaticCallee : state.jsxCallee,
        args,
Severity: Minor
Found in packages/babel-helper-builder-react-jsx-experimental/src/index.js and 1 other location - About 55 mins to fix
packages/babel-helper-builder-react-jsx-experimental/src/index.js on lines 618..623

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 54.

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

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

    flowEnumErrorStringMemberInconsistentlyInitailized(
      pos: number,
      { enumName }: { enumName: string },
    ): void {
      this.raise(
Severity: Minor
Found in packages/babel-parser/src/plugins/flow.js and 1 other location - About 55 mins to fix
packages/babel-parser/src/plugins/flow.js on lines 3081..3086

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 54.

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

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

    flowEnumErrorInconsistentMemberValues(
      pos: number,
      { enumName }: { enumName: string },
    ): void {
      this.raise(pos, FlowErrors.EnumInconsistentMemberValues, enumName);
Severity: Minor
Found in packages/babel-parser/src/plugins/flow.js and 1 other location - About 55 mins to fix
packages/babel-parser/src/plugins/flow.js on lines 3138..3147

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 54.

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

Similar blocks of code found in 3 locations. Consider refactoring.
Open

      Array: {
        from: { stable: true, path: "array/from" },
        isArray: { stable: true, path: "array/is-array" },
        of: { stable: true, path: "array/of" },
      },
Severity: Major
Found in packages/babel-plugin-transform-runtime/src/runtime-corejs3-definitions.js and 2 other locations - About 55 mins to fix
packages/babel-plugin-transform-runtime/src/runtime-corejs2-definitions.js on lines 23..27
packages/babel-plugin-transform-runtime/src/runtime-corejs2-definitions.js on lines 113..117

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 54.

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

Function buildOptimizedSequenceExpression has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

const buildOptimizedSequenceExpression = ({ assign, call, path }) => {
  const { left: placeholderNode, right: pipelineLeft } = assign;
  const { callee: calledExpression } = call;

  let optimizeArrow =
Severity: Minor
Found in packages/babel-plugin-proposal-pipeline-operator/src/buildOptimizedSequenceExpression.js - About 55 mins to fix

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 exit has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

    exit(path) {
      const { scope, bindingNames } = this;

      const arg = path.get("argument");
      if (!arg.isIdentifier()) return;
Severity: Minor
Found in packages/babel-helper-simple-access/src/index.js - About 55 mins to fix

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 throwVersionError has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

function throwVersionError(range, version) {
  if (typeof range === "number") {
    if (!Number.isInteger(range)) {
      throw new Error("Expected string or integer value.");
    }
Severity: Minor
Found in packages/babel-helper-plugin-utils/src/index.js - About 55 mins to fix

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 targetsSupported has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export function targetsSupported(target: Targets, support: Targets) {
  const targetEnvironments = Object.keys(target);

  if (targetEnvironments.length === 0) {
    return false;
Severity: Minor
Found in packages/babel-helper-compilation-targets/src/filter-items.js - About 55 mins to fix

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 9 (exceeds 5 allowed). Consider refactoring.
Open

  create(context /*: Context */) {
    let pluginFound = false;

    return {
      FunctionDeclaration: functionVisitor,
Severity: Minor
Found in eslint/babel-eslint-plugin-development/src/rules/plugin-name.js - About 55 mins to fix

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 VariableDeclaration has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

  VariableDeclaration(path, state) {
    if (state.kind && path.node.kind !== state.kind) return;

    const nodes = [];
Severity: Minor
Found in packages/babel-helper-hoist-variables/src/index.js - About 55 mins to fix

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 transpileNamespace has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export default function transpileNamespace(path, t, allowNamespaces) {
  if (path.node.declare || path.node.id.type === "StringLiteral") {
    path.remove();
    return;
  }
Severity: Minor
Found in packages/babel-plugin-transform-typescript/src/namespace.js - About 55 mins to fix

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 filterItems has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export default function filterItems(
  list: { [feature: string]: Targets },
  includes: Set<string>,
  excludes: Set<string>,
  targets: Targets,
Severity: Minor
Found in packages/babel-helper-compilation-targets/src/filter-items.js - About 55 mins to fix

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 readCodePoint has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

  readCodePoint(throwOnInvalid: boolean): number | null {
    const ch = this.input.charCodeAt(this.state.pos);
    let code;

    if (ch === charCodes.leftCurlyBrace) {
Severity: Minor
Found in packages/babel-parser/src/tokenizer/index.js - About 55 mins to fix

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 parseObjectMethod has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

  parseObjectMethod(
    prop: N.ObjectMethod,
    isGenerator: boolean,
    isAsync: boolean,
    isPattern: boolean,
Severity: Minor
Found in packages/babel-parser/src/parser/expression.js - About 55 mins to fix

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 parseIdentifierName has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

  parseIdentifierName(pos: number, liberal?: boolean): string {
    let name: string;

    if (this.match(tt.name)) {
      name = this.state.value;
Severity: Minor
Found in packages/babel-parser/src/parser/expression.js - About 55 mins to fix

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 isLet has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

  isLet(context: ?string): boolean {
    if (!this.isContextual("let")) {
      return false;
    }
    const next = this.nextTokenStart();
Severity: Minor
Found in packages/babel-parser/src/parser/statement.js - About 55 mins to fix

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 parseExportSpecifiers has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

  parseExportSpecifiers(): Array<N.ExportSpecifier> {
    const nodes = [];
    let first = true;

    // export { x, y as z } [from '...']
Severity: Minor
Found in packages/babel-parser/src/parser/statement.js - About 55 mins to fix

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 toBlock has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export default function toBlock(node: Object, parent: Object): Object {
  if (isBlockStatement(node)) {
    return node;
  }
Severity: Minor
Found in packages/babel-types/src/converters/toBlock.js - About 55 mins to fix

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 injectInitialization has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.
Open

export function injectInitialization(path, constructor, nodes, renamer) {
  if (!nodes.length) return;

  const isDerived = !!path.node.superClass;
Severity: Minor
Found in packages/babel-helper-create-class-features-plugin/src/misc.js - About 55 mins to fix

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

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