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Function traverseSimpleImpl has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

function traverseSimpleImpl<T>(
  node: Object,
  enter: ?Function,
  exit: ?Function,
  state: ?T,
Severity: Minor
Found in packages/babel-types/src/traverse/traverse.js - About 2 hrs 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 assertOptionalChainStart has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function assertOptionalChainStart(): Validator {
  function validate(node) {
    let current = node;
    while (node) {
      const { type } = current;
Severity: Minor
Found in packages/babel-types/src/definitions/utils.js - About 2 hrs 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 buildFieldsInitNodes has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function buildFieldsInitNodes(
  ref,
  superRef,
  props,
  privateNamesMap,
Severity: Minor
Found in packages/babel-helper-create-class-features-plugin/src/fields.js - About 2 hrs 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 ImportDeclaration has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function ImportDeclaration(node: Object) {
  this.word("import");
  this.space();

  if (node.importKind === "type" || node.importKind === "typeof") {
Severity: Minor
Found in packages/babel-generator/src/generators/modules.js - About 2 hrs 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 needsWhitespace has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function needsWhitespace(node, parent, type) {
  if (!node) return 0;

  if (t.isExpressionStatement(node)) {
    node = node.expression;
Severity: Minor
Found in packages/babel-generator/src/node/index.js - About 2 hrs 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 isInStrictMode has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function isInStrictMode() {
  const start = this.isProgram() ? this : this.parentPath;

  const strictParent = start.find(path => {
    if (path.isProgram({ sourceType: "module" })) return true;
Severity: Minor
Found in packages/babel-traverse/src/path/introspection.js - About 2 hrs 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 _guessExecutionStatusRelativeTo has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function _guessExecutionStatusRelativeTo(
  target: NodePath,
): RelativeExecutionStatus {
  // check if the two paths are in different functions, we can't track execution of these
  const funcParent = {
Severity: Minor
Found in packages/babel-traverse/src/path/introspection.js - About 2 hrs 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 ReferencedIdentifier has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

  ReferencedIdentifier(path, state) {
    // Don't hoist regular JSX identifiers ('div', 'span', etc).
    // We do have to consider member expressions for hoisting (e.g. `this.component`)
    if (
      path.isJSXIdentifier() &&
Severity: Minor
Found in packages/babel-traverse/src/path/lib/hoister.js - About 2 hrs 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 _getAttachmentPath has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

  _getAttachmentPath() {
    const scopes = this.scopes;

    const scope = scopes.pop();
    // deopt: no compatible scopes
Severity: Minor
Found in packages/babel-traverse/src/path/lib/hoister.js - About 2 hrs 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 insertBefore has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export function insertBefore(nodes) {
  this._assertUnremoved();

  nodes = this._verifyNodeList(nodes);
Severity: Minor
Found in packages/babel-traverse/src/path/modification.js - About 2 hrs 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 splitExportDeclaration has a Cognitive Complexity of 16 (exceeds 5 allowed). Consider refactoring.
Open

export default function splitExportDeclaration(exportDeclaration) {
  if (!exportDeclaration.isExportDeclaration()) {
    throw new Error("Only export declarations can be splitted.");
  }
Severity: Minor
Found in packages/babel-helper-split-export-declaration/src/index.js - About 2 hrs 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 52 lines of code (exceeds 25 allowed). Consider refactoring.
Open

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

      const arg = path.get("argument");
      if (!arg.isIdentifier()) return;
Severity: Major
Found in packages/babel-helper-simple-access/src/index.js - About 2 hrs to fix

    Function readToken_pipe_amp has 52 lines of code (exceeds 25 allowed). Consider refactoring.
    Open

      readToken_pipe_amp(code: number): void {
    // '||' '&&' '||=' '&&='
    const next = this.input.charCodeAt(this.state.pos + 1);

    if (next === code) {
    Severity: Major
    Found in packages/babel-parser/src/tokenizer/index.js - About 2 hrs to fix

      Function valueToNode has 52 lines of code (exceeds 25 allowed). Consider refactoring.
      Open

      export default function valueToNode(value: any): Object {
  // undefined
  if (value === undefined) {
    return identifier("undefined");
  }
      Severity: Major
      Found in packages/babel-types/src/converters/valueToNode.js - About 2 hrs to fix

        Function loadScripts has 52 lines of code (exceeds 25 allowed). Consider refactoring.
        Open

        function loadScripts(transformFn, scripts) {
  const result = [];
  const count = scripts.length;

  function check() {
        Severity: Major
        Found in packages/babel-standalone/src/transformScriptTags.js - About 2 hrs to fix

          Function ForOfStatement has 52 lines of code (exceeds 25 allowed). Consider refactoring.
          Open

                  ForOfStatement(path) {
          const { scope } = path;
          const { left, right, await: isAwait } = path.node;
          if (isAwait) {
            return;
          Severity: Major
          Found in packages/babel-plugin-transform-for-of/src/index.js - About 2 hrs to fix

            File rest.js has 253 lines of code (exceeds 250 allowed). Consider refactoring.
            Open

            import { template, types as t } from "@babel/core";

const buildRest = template(`
  for (var LEN = ARGUMENTS.length,
           ARRAY = new Array(ARRAY_LEN),
            Severity: Minor
            Found in packages/babel-plugin-transform-parameters/src/rest.js - About 2 hrs to fix

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

              export function ImportNamespaceSpecifier(node: Object) {
  this.token("*");
  this.space();
  this.word("as");
  this.space();
              Severity: Major
              Found in packages/babel-generator/src/generators/modules.js and 1 other location - About 2 hrs to fix
              packages/babel-generator/src/generators/modules.js on lines 36..42

              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 76.

              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

              export function ExportNamespaceSpecifier(node: Object) {
  this.token("*");
  this.space();
  this.word("as");
  this.space();
              Severity: Major
              Found in packages/babel-generator/src/generators/modules.js and 1 other location - About 2 hrs to fix
              packages/babel-generator/src/generators/modules.js on lines 200..206

              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 76.

              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

                  if (this.state.inParameters) {
      this.raise(node.start, Errors.YieldInParameter);
    } else if (this.state.yieldPos === -1) {
      this.state.yieldPos = node.start;
    }
              Severity: Major
              Found in packages/babel-parser/src/parser/expression.js and 1 other location - About 2 hrs to fix
              packages/babel-parser/src/parser/expression.js on lines 2248..2252

              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 76.

              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

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