In react-ts, anonymous functions are not allowed in render. If anonymous functions are not used, state updates are not allowed.

const renderItem = (item: string, index: number) => {
  console.log(warpProps.handleItemDelete)
  return (
    <List.Item>
      <p onClick={warpProps.handleItemDelete(index)}>{item}

</List.Item> ) }

report an error

Warning: Cannot update during an existing state transition (such as within `render`). Render methods should be a pure function of props and state.

if it is an anonymous function

const renderItem = (item: string, index: number) => {
  console.log(warpProps.handleItemDelete)
  return (
    <List.Item>
      <p onClick={() => warpProps.handleItemDelete(index)}>{item}

</List.Item> ) }

report an error

Lambdas are forbidden in JSX attributes due to their rendering performance impact
Apr.20,2022

the error report is tslint. I just want to turn off the anonymous function restriction


directly

<div onClick={this.onChange}></div> 

is fine

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