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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 01:47:29 +0000
commit0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d (patch)
treea31f07c9bcca9d56ce61e9a1ffd30ef350d513aa /docs/code-quality/lint/linters/eslint-plugin-mozilla/prefer-boolean-length-check.rst
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downloadfirefox-esr-0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d.tar.xz
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Adding upstream version 115.8.0esr.upstream/115.8.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+prefer-boolean-length-check
+===========================
+
+Prefers using a boolean length check rather than comparing against zero.
+
+Examples of incorrect code for this rule:
+-----------------------------------------
+
+.. code-block:: js
+
+ if (foo.length == 0) {}
+ if (foo.length > 0) {}
+ if (foo && foo.length == 0) {}
+ function bar() { return foo.length > 0 }
+
+Examples of correct code for this rule:
+---------------------------------------
+
+.. code-block:: js
+
+ if (foo.length && foo.length) {}
+ if (!foo.length) {}
+ var a = foo.length > 0
+ function bar() { return !!foo.length }