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

            <ErrorBoundary
              logName="InnerUpdateBoundary"
              renderError={renderUpdateError}>
              <BrokenComponentDidUpdate errorText="E3" />
              <BrokenComponentDidUpdate errorText="E4" />
Severity: Major
Found in packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js and 2 other locations - About 45 mins to fix
packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js on lines 1829..1834
packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js on lines 1852..1857

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 50.

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

    class AnonymousParentNotUsingJSX extends React.Component {
      render() {
        return React.createElement(StatelessComponent, {
          name: 'A',
          ref: () => {},
Severity: Minor
Found in packages/render/dom/__tests__/ReactStatelessComponent-test.js and 1 other location - About 45 mins to fix
packages/render/dom/__tests__/ReactStatelessComponent-test.js on lines 269..276

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 50.

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

    class NamedParentNotUsingJSX extends React.Component {
      render() {
        return React.createElement(StatelessComponent, {
          name: 'A',
          ref: () => {},
Severity: Minor
Found in packages/render/dom/__tests__/ReactStatelessComponent-test.js and 1 other location - About 45 mins to fix
packages/render/dom/__tests__/ReactStatelessComponent-test.js on lines 241..248

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 50.

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

            <ErrorBoundary
              logName="InnerUnmountBoundary"
              renderError={renderUnmountError}>
              <BrokenComponentWillUnmount errorText="E1" />
              <BrokenComponentWillUnmount errorText="E2" />
Severity: Major
Found in packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js and 2 other locations - About 45 mins to fix
packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js on lines 1835..1840
packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js on lines 1852..1857

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 50.

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

            <ErrorBoundary
              logName="InnerUpdateBoundary"
              renderError={renderUpdateError}>
              <BrokenComponentDidUpdate errorText="E3" />
              <BrokenComponentDidUpdate errorText="E4" />
Severity: Major
Found in packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js and 2 other locations - About 45 mins to fix
packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js on lines 1829..1834
packages/render/dom/__tests__/ReactErrorBoundaries-test.internal.js on lines 1835..1840

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 50.

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

    ReactTestUtils.renderIntoDocument(
      <select>
        <option selected={true} />
        <option selected={true} />
      </select>
Severity: Minor
Found in packages/render/dom/__tests__/ReactDOMSelect-test.js and 1 other location - About 45 mins to fix
packages/render/dom/__tests__/ReactDOMSelect-test.js on lines 553..558

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 50.

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

            apply(target, thisArg, argumentsList) {
                const error = Reflect.apply(target, thisArg, argumentsList);
                error.message = decodeErrorMessage(error.message);
                return error;
            },
Severity: Minor
Found in scripts/jest/setupTests.js and 1 other location - About 45 mins to fix
scripts/jest/setupTests.js on lines 145..149

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 50.

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

      ReactTestUtils.renderIntoDocument(
        <select>
          <option selected={true} />
          <option selected={true} />
        </select>
Severity: Minor
Found in packages/render/dom/__tests__/ReactDOMSelect-test.js and 1 other location - About 45 mins to fix
packages/render/dom/__tests__/ReactDOMSelect-test.js on lines 547..552

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 50.

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

            construct(target, argumentsList, newTarget) {
                const error = Reflect.construct(target, argumentsList, newTarget);
                error.message = decodeErrorMessage(error.message);
                return error;
            },
Severity: Minor
Found in scripts/jest/setupTests.js and 1 other location - About 45 mins to fix
scripts/jest/setupTests.js on lines 140..144

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 50.

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 5 locations. Consider refactoring.
Open

    expect(() => ReactDOM.render(<WillReceiveProps />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillReceiveProps uses getDerivedStateFromProps() but also contains the following legacy lifecycles:\n' +
        '  componentWillReceiveProps\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
Severity: Major
Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879
packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

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 49.

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 5 locations. Consider refactoring.
Open

    expect(() => ReactDOM.render(<WillReceiveProps />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillReceiveProps uses getSnapshotBeforeUpdate() but also contains the following legacy lifecycles:\n' +
        '  componentWillReceiveProps\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
Severity: Major
Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

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 49.

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 5 locations. Consider refactoring.
Open

    expect(() => ReactDOM.render(<WillMount />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillMount uses getSnapshotBeforeUpdate() but also contains the following legacy lifecycles:\n' +
        '  UNSAFE_componentWillMount\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
Severity: Major
Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879
packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

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 49.

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 5 locations. Consider refactoring.
Open

    expect(() => ReactDOM.render(<Parent />, container)).toWarnDev(
      'Warning: Using Maps as children is unsupported and will likely yield ' +
        'unexpected results. Convert it to a sequence/iterable of keyed ' +
        'ReactElements instead.\n' +
        '    in div (at **)\n' +
Severity: Major
Found in packages/render/dom/__tests__/ReactMultiChild-test.js and 4 other locations - About 40 mins to fix
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 751..757
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879

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 49.

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 5 locations. Consider refactoring.
Open

    expect(() => ReactDOM.render(<WillMount />, container)).toWarnDev(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        'WillMount uses getDerivedStateFromProps() but also contains the following legacy lifecycles:\n' +
        '  UNSAFE_componentWillMount\n\n' +
        'The above lifecycles should be removed. Learn more about this warning here:\n' +
Severity: Major
Found in packages/render/dom/__tests__/ReactComponentLifeCycle-test.js and 4 other locations - About 40 mins to fix
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 791..797
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 835..841
packages/render/dom/__tests__/ReactComponentLifeCycle-test.js on lines 873..879
packages/render/dom/__tests__/ReactMultiChild-test.js on lines 289..295

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 49.

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

        ReactDOM.unstable_batchedUpdates(() => {
            parent.setState({ foo: true });
            child.setState({ bar: true });
        });
Severity: Minor
Found in packages/render/dom/__tests__/ReactCompositeComponentState-test.js and 1 other location - About 40 mins to fix
packages/render/dom/__tests__/ReactCompositeComponentState-test.js on lines 261..264

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 49.

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

        ReactDOM.unstable_batchedUpdates(() => {
            parent.setState({ foo: false });
            child.setState({ bar: false });
        });
Severity: Minor
Found in packages/render/dom/__tests__/ReactCompositeComponentState-test.js and 1 other location - About 40 mins to fix
packages/render/dom/__tests__/ReactCompositeComponentState-test.js on lines 249..252

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 49.

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 contains(a, b) {
    if (b) {
        while ((b = b.parentNode)) {
            if (b === a) {
                return true;
Severity: Minor
Found in packages/render/dom/browser.js and 1 other location - About 40 mins to fix
lib/ReactInputSelection.js on lines 20..29

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 49.

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

    function containsNode(a, b) {
        if (b) {
            while ((b = b.parentNode)) {
                if (b === a) {
                    return true;
Severity: Minor
Found in lib/ReactInputSelection.js and 1 other location - About 40 mins to fix
packages/render/dom/browser.js on lines 64..73

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 49.

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 4 locations. Consider refactoring.
Open

        class ComponentB extends React.Component {
            static childContextTypes = {
                foo: PropTypes.string.isRequired,
            };
            render() {
Severity: Major
Found in packages/core/__tests__/ReactContextValidator-test.js and 3 other locations - About 40 mins to fix
packages/core/__tests__/ReactContextValidator-test.js on lines 255..262
packages/core/__tests__/ReactContextValidator-test.js on lines 305..312
packages/render/dom/__tests__/ReactCompositeComponent-test.js on lines 1258..1266

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 48.

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

  componentDidMount() {
    handleSuccess({
      errMsg: 'showLoading:ok'
    }, this.props.success, this.props.complete, this.props.resolve);
  }
Severity: Minor
Found in packages/render/miniapp/apiForH5/Components/Loading.js and 2 other locations - About 40 mins to fix
packages/render/miniapp/apiForH5/Components/Toast.js on lines 5..9
packages/render/miniapp/apiForH5/previewImage.js on lines 18..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 48.

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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