noFlatMapIdentity
诊断类别：lint/correctness/noFlatMapIdentity
¥Diagnostic Category: lint/correctness/noFlatMapIdentity
自从：v1.7.0
¥Since: v1.7.0
来源：
¥Sources:
-
与以下相同：
flat_map_identity¥Same as:
flat_map_identity
禁止在 flatMap 上使用不必要的回调。
¥Disallow to use unnecessary callback on flatMap.
为了更简洁、更有效地实现相同的结果（展平数组），你应该改用 flat。
¥To achieve the same result (flattening an array) more concisely and efficiently, you should use flat instead.
¥Examples
¥Invalid
array.flatMap((arr) => arr);code-block.js:1:1 lint/correctness/noFlatMapIdentity FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ Avoid unnecessary callback in flatMap call.
> 1 │ array.flatMap((arr) => arr);
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^
2 │
ℹ You can just use flat to flatten the array.
ℹ Safe fix: Replace unnecessary flatMap call to flat instead.
1 │ - array.flatMap((arr)·=>·arr);
1 │ + array.flat();
2 2 │
array.flatMap((arr) => {return arr});code-block.js:1:1 lint/correctness/noFlatMapIdentity FIXABLE ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ Avoid unnecessary callback in flatMap call.
> 1 │ array.flatMap((arr) => {return arr});
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2 │
ℹ You can just use flat to flatten the array.
ℹ Safe fix: Replace unnecessary flatMap call to flat instead.
1 │ - array.flatMap((arr)·=>·{return·arr});
1 │ + array.flat();
2 2 │
¥Valid
array.flatMap((arr) => arr * 2);¥Related links