noSelfAssign
¥Summary
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规则生效日期：
v1.0.0¥Rule available since:
v1.0.0 -
诊断类别：
lint/correctness/noSelfAssign¥Diagnostic Category:
lint/correctness/noSelfAssign -
此规则为推荐规则，默认启用。
¥This rule is recommended, which means is enabled by default.
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此规则没有修复方案。
¥This rule doesn’t have a fix.
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此规则的默认严重级别为 error。
¥The default severity of this rule is error.
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来源：
¥Sources:
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与
no-self-assign相同¥Same as
no-self-assign -
与
self_assignment相同¥Same as
self_assignment
-
¥How to configure
{ "linter": { "rules": { "correctness": { "noSelfAssign": "error" } } }}¥Description
禁止在双方完全相同的情况下进行分配。
¥Disallow assignments where both sides are exactly the same.
自我分配无效，因此可能是由于重构不完整而导致的错误。
¥Self assignments have no effect, so probably those are an error due to incomplete refactoring.
¥Examples
¥Invalid
a = a;code-block.js:1:5 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ a is assigned to itself.
> 1 │ a = a;
│ ^
2 │
ℹ This is where is assigned.
> 1 │ a = a;
│ ^
2 │
ℹ Self assignments have no effect and can be removed.
[a] = [a];code-block.js:1:8 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ a is assigned to itself.
> 1 │ [a] = [a];
│ ^
2 │
ℹ This is where is assigned.
> 1 │ [a] = [a];
│ ^
2 │
ℹ Self assignments have no effect and can be removed.
({a: b} = {a: b});code-block.js:1:15 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ b is assigned to itself.
> 1 │ ({a: b} = {a: b});
│ ^
2 │
ℹ This is where is assigned.
> 1 │ ({a: b} = {a: b});
│ ^
2 │
ℹ Self assignments have no effect and can be removed.
a.b = a.b;code-block.js:1:9 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ b is assigned to itself.
> 1 │ a.b = a.b;
│ ^
2 │
ℹ This is where is assigned.
> 1 │ a.b = a.b;
│ ^
2 │
ℹ Self assignments have no effect and can be removed.
a[b] = a[b];code-block.js:1:10 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ b is assigned to itself.
> 1 │ a[b] = a[b];
│ ^
2 │
ℹ This is where is assigned.
> 1 │ a[b] = a[b];
│ ^
2 │
ℹ Self assignments have no effect and can be removed.
a[b].foo = a[b].foo;code-block.js:1:17 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ foo is assigned to itself.
> 1 │ a[b].foo = a[b].foo;
│ ^^^
2 │
ℹ This is where is assigned.
> 1 │ a[b].foo = a[b].foo;
│ ^^^
2 │
ℹ Self assignments have no effect and can be removed.
a['b'].foo = a['b'].foo;code-block.js:1:21 lint/correctness/noSelfAssign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ foo is assigned to itself.
> 1 │ a[‘b’].foo = a[‘b’].foo;
│ ^^^
2 │
ℹ This is where is assigned.
> 1 │ a[‘b’].foo = a[‘b’].foo;
│ ^^^
2 │
ℹ Self assignments have no effect and can be removed.
¥Valid
a &= a;var a = a;let a = a;const a = a;[a, b] = [b, a];¥Related links
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