Avoid negating the left operand of relational operators
このページは日本語には対応しておりません。随時翻訳に取り組んでいます。翻訳に関してご質問やご意見ございましたら、お気軽にご連絡ください。
ID: javascript-best-practices/no-unsafe-negation
Language: JavaScript
Severity: Warning
Category: Best Practices
Description
Negation of the left-hand side of an expression is often unintended.
Non-Compliant Code Examples
!a in b
(!a in b)
!(a) in b
!a instanceof b
(!a instanceof b)
!(a) instanceof b
Compliant Code Examples
a in b
a in b === false
!(a in b);
(!a) in b
a instanceof b
a instanceof b === false;
!(a instanceof b);
(!a) instanceof b;
Seamless integrations. Try Datadog Code Analysis