a3be39441e
You can preview this rule [here](https://sonarsource.github.io/rspec/#/rspec/S6645/javascript) (updated a few minutes after each push). https://github.com/SonarSource/SonarJS/issues/3922 ## Review A dedicated reviewer checked the rule description successfully for: - [ ] logical errors and incorrect information - [ ] information gaps and missing content - [ ] text style and tone - [ ] PR summary and labels follow [the guidelines](https://github.com/SonarSource/rspec/#to-modify-an-existing-rule) --------- Co-authored-by: alexander-kamushkin-sonarsource <alexander-kamushkin-sonarsource@users.noreply.github.com> Co-authored-by: Alexander Kamushkin <alexander.kamushkin@sonarsource.com>
19 lines
813 B
Plaintext
19 lines
813 B
Plaintext
== Why is this an issue?
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Initializing a variable to `undefined` is unnecessary and should be avoided. A variable will automatically be set to `undefined` if you declare it without initialization, so the initialization code is redundant in this case.
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[source,javascript]
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----
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var foo = undefined; // Non-compliant, replace with var foo;
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let bar = undefined; // Non-compliant, replace with let foo;
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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/Global_Objects/undefined[MDN - undefined]
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let[MDN - let]
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/var[MDN - var]
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* https://developer.mozilla.org/en-US/docs/Glossary/Hoisting[MDN - hoisting] |