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

  const createIdentifierParser = (id: string) => () => {
    return id
      .split(".")
      .map(name => t.identifier(name))
      .reduce((object, property) => t.memberExpression(object, property));
Severity: Major
Found in packages/babel-plugin-transform-react-jsx/src/transform-classic.js and 1 other location - About 1 hr to fix
packages/babel-helper-builder-react-jsx-experimental/src/index.js on lines 400..405

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 59.

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.match(tt.string)) {
        node.id = this.parseExprAtom();
      } else {
        node.id = this.parseIdentifier();
      }
Severity: Major
Found in packages/babel-parser/src/plugins/flow.js and 1 other location - About 1 hr to fix
packages/babel-parser/src/plugins/jsx/index.js on lines 341..345

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 59.

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

defineType("RecordExpression", {
  visitor: ["properties"],
  aliases: ["Expression"],
  fields: {
    properties: {
Severity: Major
Found in packages/babel-types/src/definitions/experimental.js and 1 other location - About 1 hr to fix
packages/babel-types/src/definitions/core.js on lines 713..726

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 59.

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.match(tt.braceR)) {
        node.expression = this.jsxParseEmptyExpression();
      } else {
        node.expression = this.parseExpression();
      }
Severity: Major
Found in packages/babel-parser/src/plugins/jsx/index.js and 1 other location - About 1 hr to fix
packages/babel-parser/src/plugins/flow.js on lines 376..380

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 59.

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 loadPreset(
  name: string,
  dirname: string,
): { filepath: string, value: mixed } {
  throw new Error(
Severity: Major
Found in packages/babel-core/src/config/files/index-browser.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/files/index-browser.js on lines 73..80

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 59.

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

defineType("ObjectExpression", {
  visitor: ["properties"],
  aliases: ["Expression"],
  fields: {
    properties: {
Severity: Major
Found in packages/babel-types/src/definitions/core.js and 1 other location - About 1 hr to fix
packages/babel-types/src/definitions/experimental.js on lines 314..327

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 59.

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

      NumericLiteral({ node }) {
        // number octal like 0b10 or 0o70
        if (node.extra && /^0[ob]/i.test(node.extra.raw)) {
          node.extra = undefined;
        }
Severity: Major
Found in packages/babel-plugin-transform-literals/src/index.js and 1 other location - About 1 hr to fix
packages/babel-plugin-transform-literals/src/index.js on lines 17..22

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 59.

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 loadPlugin(
  name: string,
  dirname: string,
): { filepath: string, value: mixed } {
  throw new Error(
Severity: Major
Found in packages/babel-core/src/config/files/index-browser.js and 1 other location - About 1 hr to fix
packages/babel-core/src/config/files/index-browser.js on lines 82..89

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 59.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-function-bind",
Severity: Major
Found in packages/babel-plugin-syntax-function-bind/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-export-default-from/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-import-meta/src/index.js on lines 3..13
packages/babel-plugin-syntax-logical-assignment-operators/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-partial-application/src/index.js on lines 3..13
packages/babel-plugin-syntax-throw-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-top-level-await/src/index.js on lines 3..13

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 58.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-export-default-from",
Severity: Major
Found in packages/babel-plugin-syntax-export-default-from/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-bind/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-import-meta/src/index.js on lines 3..13
packages/babel-plugin-syntax-logical-assignment-operators/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-partial-application/src/index.js on lines 3..13
packages/babel-plugin-syntax-throw-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-top-level-await/src/index.js on lines 3..13

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 58.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-partial-application",
Severity: Major
Found in packages/babel-plugin-syntax-partial-application/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-export-default-from/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-bind/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-import-meta/src/index.js on lines 3..13
packages/babel-plugin-syntax-logical-assignment-operators/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-throw-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-top-level-await/src/index.js on lines 3..13

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 58.

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 11 locations. Consider refactoring.
Open

  if (node.implements) {
    this.space();
    this.word("implements");
    this.space();
    this.printList(node.implements, node);
Severity: Major
Found in packages/babel-generator/src/generators/classes.js and 10 other locations - About 1 hr to fix
packages/babel-generator/src/generators/classes.js on lines 94..99
packages/babel-generator/src/generators/classes.js on lines 110..115
packages/babel-generator/src/generators/flow.js on lines 237..242
packages/babel-generator/src/generators/flow.js on lines 445..450
packages/babel-generator/src/generators/flow.js on lines 465..470
packages/babel-generator/src/generators/modules.js on lines 129..134
packages/babel-generator/src/generators/statements.js on lines 163..168
packages/babel-generator/src/generators/statements.js on lines 295..300
packages/babel-generator/src/generators/typescript.js on lines 19..24
packages/babel-generator/src/generators/typescript.js on lines 26..31

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 58.

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

  if (typeof corejs === "object" && corejs !== null) {
    rawVersion = corejs.version;
    proposals = Boolean(corejs.proposals);
  } else {
    rawVersion = corejs;
Severity: Major
Found in packages/babel-plugin-transform-runtime/src/index.js and 1 other location - About 1 hr to fix
packages/babel-preset-env/src/normalize-options.js on lines 235..240

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 58.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-top-level-await",
Severity: Major
Found in packages/babel-plugin-syntax-top-level-await/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-export-default-from/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-bind/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-import-meta/src/index.js on lines 3..13
packages/babel-plugin-syntax-logical-assignment-operators/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-partial-application/src/index.js on lines 3..13
packages/babel-plugin-syntax-throw-expressions/src/index.js on lines 3..13

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 58.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-throw-expressions",
Severity: Major
Found in packages/babel-plugin-syntax-throw-expressions/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-export-default-from/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-bind/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-import-meta/src/index.js on lines 3..13
packages/babel-plugin-syntax-logical-assignment-operators/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-partial-application/src/index.js on lines 3..13
packages/babel-plugin-syntax-top-level-await/src/index.js on lines 3..13

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 58.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-logical-assignment-operators",
Severity: Major
Found in packages/babel-plugin-syntax-logical-assignment-operators/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-export-default-from/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-bind/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-import-meta/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-partial-application/src/index.js on lines 3..13
packages/babel-plugin-syntax-throw-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-top-level-await/src/index.js on lines 3..13

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 58.

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

        const destructuring = new DestructuringTransformer({
          operator: node.operator,
          scope: scope,
          nodes: nodes,
          arrayOnlySpread,
Severity: Major
Found in packages/babel-plugin-transform-destructuring/src/index.js and 1 other location - About 1 hr to fix
packages/babel-plugin-transform-destructuring/src/index.js on lines 526..533

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 58.

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

    JSXAttribute(path) {
      if (t.isJSXElement(path.node.value)) {
        path.node.value = t.jsxExpressionContainer(path.node.value);
      }
    },
Severity: Major
Found in packages/babel-helper-builder-react-jsx-experimental/src/index.js and 1 other location - About 1 hr to fix
packages/babel-plugin-transform-react-jsx/src/transform-classic.js on lines 95..99

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 58.

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 11 locations. Consider refactoring.
Open

    if (node.source) {
      this.space();
      this.word("from");
      this.space();
      this.print(node.source, node);
Severity: Major
Found in packages/babel-generator/src/generators/flow.js and 10 other locations - About 1 hr to fix
packages/babel-generator/src/generators/classes.js on lines 41..46
packages/babel-generator/src/generators/classes.js on lines 94..99
packages/babel-generator/src/generators/classes.js on lines 110..115
packages/babel-generator/src/generators/flow.js on lines 445..450
packages/babel-generator/src/generators/flow.js on lines 465..470
packages/babel-generator/src/generators/modules.js on lines 129..134
packages/babel-generator/src/generators/statements.js on lines 163..168
packages/babel-generator/src/generators/statements.js on lines 295..300
packages/babel-generator/src/generators/typescript.js on lines 19..24
packages/babel-generator/src/generators/typescript.js on lines 26..31

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 58.

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 10 locations. Consider refactoring.
Open

export default declare(api => {
  api.assertVersion(7);

  return {
    name: "syntax-import-meta",
Severity: Major
Found in packages/babel-plugin-syntax-import-meta/src/index.js and 9 other locations - About 1 hr to fix
packages/babel-plugin-syntax-do-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-export-default-from/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-bind/src/index.js on lines 3..13
packages/babel-plugin-syntax-function-sent/src/index.js on lines 3..13
packages/babel-plugin-syntax-logical-assignment-operators/src/index.js on lines 3..13
packages/babel-plugin-syntax-numeric-separator/src/index.js on lines 3..13
packages/babel-plugin-syntax-partial-application/src/index.js on lines 3..13
packages/babel-plugin-syntax-throw-expressions/src/index.js on lines 3..13
packages/babel-plugin-syntax-top-level-await/src/index.js on lines 3..13

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 58.

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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