useHookAtTopLevel

诊断类别：lint/correctness/useHookAtTopLevel

¥Diagnostic Category: lint/correctness/useHookAtTopLevel

JSX and TSX

自从：v1.0.0 来源：

¥Since: v1.0.0 Sources:

与以下相同：react-hooks/rules-of-hooks

¥Same as: react-hooks/rules-of-hooks

强制所有 React 钩子都从顶层组件函数调用。

¥Enforce that all React hooks are being called from the Top Level component functions.

要了解为什么需要这个，请参阅 https://react.nodejs.cn/docs/hooks-rules.html#only-call-hooks-at-the-top-level

¥To understand why this required see https://react.nodejs.cn/docs/hooks-rules.html#only-call-hooks-at-the-top-level

示例

¥Examples

无效

¥Invalid

function Component1({ a }) {
    if (a == 1) {
        useEffect();
    }
}

code-block.js:3:9 lint/correctness/useHookAtTopLevel ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ This hook is being called conditionally, but all hooks must be called in the exact same order in every component render.
  
    1 │ function Component1({ a }) {
    2 │     if (a == 1) {
  > 3 │         useEffect();
      │         ^^^^^^^^^
    4 │     }
    5 │ }
  
  ℹ For React to preserve state between calls, hooks needs to be called unconditionally and always in the same order.
  
  ℹ See https://react.nodejs.cn/docs/hooks-rules.html#only-call-hooks-at-the-top-level

function Component1({ a }) {
    if (a != 1) {
        return;
    }

    useEffect();
}

code-block.js:6:5 lint/correctness/useHookAtTopLevel ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ⚠ This hook is being called conditionally, but all hooks must be called in the exact same order in every component render.
  
    4 │     }
    5 │ 
  > 6 │     useEffect();
      │     ^^^^^^^^^
    7 │ }
    8 │ 
  
  ℹ Hooks should not be called after an early return.
  
    1 │ function Component1({ a }) {
  > 2 │     if (a != 1) {
      │                  
  > 3 │         return;
      │         ^^^^^^^
    4 │     }
    5 │ 
  
  ℹ For React to preserve state between calls, hooks needs to be called unconditionally and always in the same order.
  
  ℹ See https://react.nodejs.cn/docs/hooks-rules.html#only-call-hooks-at-the-top-level

有效

¥Valid

function Component1() {
    useEffect();
}

useHookAtTopLevel

示例

无效

有效

相关链接