logical-assignment-operators

要求或禁止逻辑赋值逻辑运算符简写

一些该规则报告的问题可以通过 --fix 命令行选项 自动修复

ES2021 引入了逻辑运算符 ||、&& 和 ?? 的赋值运算符简写。以前，这仅允许用于数学运算，例如 + 或 *（参见规则 operator-assignment）。如果赋值目标和逻辑表达式的左表达式相同，则可以使用简写。例如 a = a || b 可以缩短为 a ||= b。

规则详情

此规则要求或禁止逻辑赋值运算符简写。

选项

该规则有一个字符串和一个对象选项。字符串选项：

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P+AJLL7DXIcjSWYxZB2Zq8nhHE8UGaKgqOAPZqaKHqoiwYYkbg8QXfPFd1kUkw+v7Zq8Xz/XY7GOhPKn/WAzpfNwPtApm48KyoIsYUHtH8kADcBzO37srZwqP7QWx7UF

OJZw80TxYwQOJ07dMmAfmqiv+++S8FT/3hGXczAQTh26trCLWVMgtmhr2NAmMACdhJOiqQaPL5EgmUlsz9RP6FWx6Vi2+zjnnhAp1D2QVn71yvaqmbHXxjQwNMJvVw0eni3xFgmtT7mkA4F788n+eSSzaJVywxBWNNxzyoaChm7RE/yn38ybu4aEVD1mCFMIdWProVshflc8QWCR4Vc/2VaZQOh/cbhiVXLQuYuOFo66JHSoMMNThmrzxjxx1rVqZHB2LhoS5OOdw42V/rMiUw==

always

EKtVsMjWQsWIsgwyRUkFI4hsuaWJOTP4v0wiiBvlW5Rd9YEiqeOnO03HGF2/LvAE7R829YyRt8VQR0O9ruFIDVgMkb7681ekPuQyNZrJh+Y=

/*eslint logical-assignment-operators: ["error", "always"]*/

a = a || b
a = a && b
a = a ?? b
a || (a = b)
a && (a = b)
a ?? (a = b)

EKtVsMjWQsWIsgwyRUkFI4hsuaWJOTP4v0wiiBvlW5Rd9YEiqeOnO03HGF2/LvAECnEcTFJ49I4h/7bfCKKeGuagYojYKEDx1CF7MEMDu7w=

/*eslint logical-assignment-operators: ["error", "always"]*/

a = b
a += b
a ||= b
a = b || c
a || (b = c)

if (a) a = b

never

CDruO8STtfiPEOKFpJL7OP3s/zODsVkmFoDRyeNPerKWJzOC/XsffPjrRBPva+sDxpJklNHBLSvxIoom0j0rjg3iA0oNz3SKYnbzHhs2c28=

/*eslint logical-assignment-operators: ["error", "never"]*/

a ||= b
a &&= b
a ??= b

CDruO8STtfiPEOKFpJL7OP3s/zODsVkmFoDRyeNPerIHIKjEgS1AfcbwibqAjOVeRQ0yd86ZeCQFHHLlcCo1q/0esnt+UhtmbaktHFTc6+M=

/*eslint logical-assignment-operators: ["error", "never"]*/

a = a || b
a = a && b
a = a ?? b

enforceForIfStatements

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CDruO8STtfiPEOKFpJL7OPg2wdCkZ6LtZ33aj9r5kT+Uro9CZ0r1Wugzp3WyYIHpg8N5zXGXO6OMhJhXFa/ozOFgSjvaYwxHWkEgcuqYnPgbXhwUpuhpGCBOwWzXbugwq95PTHG8eJahnFtMCB4/pQ==

/*eslint logical-assignment-operators: ["error", "always", { enforceForIfStatements: true }]*/

if (a) a = b // <=> a &&= b
if (!a) a = b // <=> a ||= b

if (a == null) a = b // <=> a ??= b
if (a === null || a === undefined) a = b // <=> a ??= b

CDruO8STtfiPEOKFpJL7OPg2wdCkZ6LtZ33aj9r5kT+Uro9CZ0r1Wugzp3WyYIHpg8N5zXGXO6OMhJhXFa/ozOFgSjvaYwxHWkEgcuqYnPjnDg8modp7qKHsYSnYrov1+ZEdyKwDBSufDF3s9KYDZA==

/*eslint logical-assignment-operators: ["error", "always", { enforceForIfStatements: true }]*/

if (a) b = c
if (a === 0) a = b

何时不使用

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