react-state | 易学教程

ReactJS could not update state when used with Tabs

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问题 I have a react component with 3 tabs, and each tab contains a datatable which will be populated with the API call result on the basis of active tab. So everytime there will be a parameter which I pass with API call and display data accordingly. This is working great, I am getting data when I switch through tabs, but when I try to search from the datatable and then click on another tab I get the error as- Can't perform a React state update on an unmounted component. This is a no-op, but it

Typescript generic state change function type casting error

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问题 I'm creating a generic function to change the state. The error message: TS2345: Argument of type '() => { [x:string]: string }' is not assignable to parameter of type 'IUserSignUpState | Pick<IUserSignUpState, "url" | "errors"> | ((prevState: Readonly<IUserSignUpState>, props: Readonly<IUserSignUpState>) => IUserSignUpState | Pick<...> | null) null'. Type '() => { [x: string] string; }' is not assignable to type '(prevState: Readonly<IUserSignUpState>, props: Readonly<IUserSignUpState>) =>

React - changing an uncontrolled input

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I have a simple react component with the form which I believe to have one controlled input: import React from 'react'; export default class MyForm extends React.Component { constructor(props) { super(props); this.state = {} } render() { return ( <form className="add-support-staff-form"> <input name="name" type="text" value={this.state.name} onChange={this.onFieldChange('name').bind(this)}/> </form> ) } onFieldChange(fieldName) { return function (event) { this.setState({[fieldName]: event.target.value}); } } } export default MyForm; When I run my application I get the following warning: Warning

React - changing an uncontrolled input

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问题 I have a simple react component with the form which I believe to have one controlled input: import React from \'react\'; export default class MyForm extends React.Component { constructor(props) { super(props); this.state = {} } render() { return ( <form className=\"add-support-staff-form\"> <input name=\"name\" type=\"text\" value={this.state.name} onChange={this.onFieldChange(\'name\').bind(this)}/> </form> ) } onFieldChange(fieldName) { return function (event) { this.setState({[fieldName]: