cc7dd64785
Co-authored-by: Yassin Kammoun <52890329+yassin-kammoun-sonarsource@users.noreply.github.com>
55 lines
1.8 KiB
Plaintext
55 lines
1.8 KiB
Plaintext
== Why is this an issue?
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Unreachable code is the code whose statements cannot be executed under any circumstances. Jump statements, like ``++return++``, ``++break++``, ``++continue++``, and ``++throw++``, alter the normal flow of control within a program, making it possible to skip certain parts of the code, terminate loops prematurely, or exit from functions. So any statements that come after a jump are effectively unreachable.
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Unreachable statements can be a sign of a logical error or oversight in the program's design, leading to unexpected behavior at runtime.
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[source,javascript,diff-id=1,diff-type=noncompliant]
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----
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function func(a) {
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let i = 10;
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return i + a;
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i++; // Noncompliant: this is never executed
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}
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----
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Identify and remove unreachable statements from your code.
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[source,javascript,diff-id=1,diff-type=noncompliant]
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----
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function func(a) {
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let i = 10;
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return i + a;
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}
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----
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== Resources
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=== Documentation
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/return[MDN - `return`]
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/break[MDN - `break`]
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/throw[MDN - `throw`]
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/continue[MDN - `continue`]
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Stmt_after_return[MDN - Warning: unreachable code after return statement]
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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=== Message
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Remove this code after the "[return|break|continue|goto|throw]" statement.
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include::../highlighting.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::../comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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