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medialize/ally.js

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src/is/focusable.js

Summary

Maintainability
C
1 day
Test Coverage

Function isFocusableRules has a Cognitive Complexity of 24 (exceeds 5 allowed). Consider refactoring.
Open

function isFocusableRules({
  context,
  except = {
    disabled: false,
    visible: false,
Severity: Minor
Found in src/is/focusable.js - About 3 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 isOnlyFocusRelevant has a Cognitive Complexity of 14 (exceeds 5 allowed). Consider refactoring.
Open

function isOnlyFocusRelevant(element) {
  const nodeName = element.nodeName.toLowerCase();
  if (nodeName === 'embed' || nodeName === 'keygen') {
    // embed is considered focus-relevant but not focusable
    // see https://github.com/medialize/ally.js/issues/82
Severity: Minor
Found in src/is/focusable.js - About 1 hr 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

Avoid too many return statements within this function.
Open

    return false;
Severity: Major
Found in src/is/focusable.js - About 30 mins to fix

    Avoid too many return statements within this function.
    Open

      return false;
    Severity: Major
    Found in src/is/focusable.js - About 30 mins to fix

      Avoid too many return statements within this function.
      Open

        return true;
      Severity: Major
      Found in src/is/focusable.js - About 30 mins to fix

        Avoid too many return statements within this function.
        Open

            return _tabindex === null || !supports.focusImgUsemapTabindex;
        Severity: Major
        Found in src/is/focusable.js - About 30 mins to fix

          Avoid too many return statements within this function.
          Open

                  return false;
          Severity: Major
          Found in src/is/focusable.js - About 30 mins to fix

            Avoid too many return statements within this function.
            Open

                return !isValidArea(element);
            Severity: Major
            Found in src/is/focusable.js - About 30 mins to fix

              Avoid too many return statements within this function.
              Open

                  return focusableAttribute && focusableAttribute === 'false';
              Severity: Major
              Found in src/is/focusable.js - About 30 mins to fix

                Similar blocks of code found in 4 locations. Consider refactoring.
                Open

                isFocusableRules.except = function(except = {}) {
  const isFocusable = function(context) {
    return isFocusableRules({
      context,
      except,
                Severity: Major
                Found in src/is/focusable.js and 3 other locations - About 1 hr to fix
                src/is/focus-relevant.js on lines 248..258
                src/is/only-tabbable.js on lines 60..70
                src/is/visible.js on lines 123..133

                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 71.

                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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