noVoidTypeReturn
诊断类别：lint/correctness/noVoidTypeReturn
¥Diagnostic Category: lint/correctness/noVoidTypeReturn
自从：v1.0.0
¥Since: v1.0.0
禁止从返回类型为 ‘void’ 的函数返回值
¥Disallow returning a value from a function with the return type ‘void’
‘void’ 表示没有值。调用者可能会忽略返回值。因此，当函数的返回类型为 ‘void’ 时返回一个值无疑是一个错误。
¥‘void’ signals the absence of value. The returned value is likely to be ignored by the caller. Thus, returning a value when the return type of function is ‘void’, is undoubtedly an error.
仅允许返回没有值，因为它是控制流语句。
¥Only returning without a value is allowed, as it’s a control flow statement.
¥Examples
¥Invalid
class A { f(): void { return undefined; }}code-block.ts:3:9 lint/correctness/noVoidTypeReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The function should not return a value because its return type is void.
1 │ class A {
2 │ f(): void {
> 3 │ return undefined;
│ ^^^^^^^^^^^^^^^^^
4 │ }
5 │ }
ℹ The function is here:
1 │ class A {
> 2 │ f(): void {
│ ^^^^^^^^^^^
> 3 │ return undefined;
> 4 │ }
│ ^
5 │ }
6 │
ℹ ‘void’ signals the absence of value. The returned value is likely to be ignored by the caller.
const a = { f(): void { return undefined; }}code-block.ts:3:9 lint/correctness/noVoidTypeReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The function should not return a value because its return type is void.
1 │ const a = {
2 │ f(): void {
> 3 │ return undefined;
│ ^^^^^^^^^^^^^^^^^
4 │ }
5 │ }
ℹ The function is here:
1 │ const a = {
> 2 │ f(): void {
│ ^^^^^^^^^^^
> 3 │ return undefined;
> 4 │ }
│ ^
5 │ }
6 │
ℹ ‘void’ signals the absence of value. The returned value is likely to be ignored by the caller.
function f(): void { return undefined;}code-block.ts:2:5 lint/correctness/noVoidTypeReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The function should not return a value because its return type is void.
1 │ function f(): void {
> 2 │ return undefined;
│ ^^^^^^^^^^^^^^^^^
3 │ }
4 │
ℹ The function is here:
> 1 │ function f(): void {
│ ^^^^^^^^^^^^^^^^^^^^
> 2 │ return undefined;
> 3 │ }
│ ^
4 │
ℹ ‘void’ signals the absence of value. The returned value is likely to be ignored by the caller.
export default function(): void { return undefined;}code-block.ts:2:5 lint/correctness/noVoidTypeReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The function should not return a value because its return type is void.
1 │ export default function(): void {
> 2 │ return undefined;
│ ^^^^^^^^^^^^^^^^^
3 │ }
4 │
ℹ The function is here:
> 1 │ export default function(): void {
│ ^^^^^^^^^^^^^^^^^^
> 2 │ return undefined;
> 3 │ }
│ ^
4 │
ℹ ‘void’ signals the absence of value. The returned value is likely to be ignored by the caller.
const g = (): void => { return undefined;};code-block.ts:2:5 lint/correctness/noVoidTypeReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The function should not return a value because its return type is void.
1 │ const g = (): void => {
> 2 │ return undefined;
│ ^^^^^^^^^^^^^^^^^
3 │ };
4 │
ℹ The function is here:
> 1 │ const g = (): void => {
│ ^^^^^^^^^^^^^
> 2 │ return undefined;
> 3 │ };
│ ^
4 │
ℹ ‘void’ signals the absence of value. The returned value is likely to be ignored by the caller.
const h = function(): void { return undefined;};code-block.ts:2:5 lint/correctness/noVoidTypeReturn ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ The function should not return a value because its return type is void.
1 │ const h = function(): void {
> 2 │ return undefined;
│ ^^^^^^^^^^^^^^^^^
3 │ };
4 │
ℹ The function is here:
> 1 │ const h = function(): void {
│ ^^^^^^^^^^^^^^^^^^
> 2 │ return undefined;
> 3 │ };
│ ^
4 │
ℹ ‘void’ signals the absence of value. The returned value is likely to be ignored by the caller.
¥Valid
class A { f() { return undefined; }}class B { f(): void {}}function f(): void { return;}¥Related links