Typescript react – Could not find a declaration file for module ”react-materialize’. ‘path/to/module-name.js’ implicitly has an any type

I had a similar error but for me it was react-router. Solved it by installing types for it. npm install –save @types/react-router Error: (6,30): error TS7016: Could not find a declaration file for module ‘react-router’. ‘\node_modules\react-router\index.js’ implicitly has an ‘any’ type. If you would like to disable it site wide you can instead edit tsconfig.json … Read more

How to scroll to bottom in react?

As Tushar mentioned, you can keep a dummy div at the bottom of your chat: render () { return ( <div> <div className=”MessageContainer” > <div className=”MessagesList”> {this.renderMessages()} </div> <div style={{ float:”left”, clear: “both” }} ref={(el) => { this.messagesEnd = el; }}> </div> </div> </div> ); } and then scroll to it whenever your component is … Read more

What are React controlled components and uncontrolled components?

This relates to stateful DOM components (form elements) and the React docs explain the difference: A Controlled Component is one that takes its current value through props and notifies changes through callbacks like onChange. A parent component “controls” it by handling the callback and managing its own state and passing the new values as props … Read more

Is it possible to use if…else… statement in React render function?

Not exactly like that, but there are workarounds. There’s a section in React’s docs about conditional rendering that you should take a look. Here’s an example of what you could do using inline if-else. render() { const isLoggedIn = this.state.isLoggedIn; return ( <div> {isLoggedIn ? ( <LogoutButton onClick={this.handleLogoutClick} /> ) : ( <LoginButton onClick={this.handleLoginClick} /> … Read more

Updating state on props change in React Form

componentWillReceiveProps is depcricated since react 16: use getDerivedStateFromProps instead If I understand correctly, you have a parent component that is passing start_time down to the ModalBody component which assigns it to its own state? And you want to update that time from the parent, not a child component. React has some tips on dealing with … Read more

create react app not picking up .env files?

With create react app, you need to prefix REACT_APP_ to the variable name. ex: REACT_APP_API_URL=http://localhost:3000/api REACT_APP_CALLBACK_URL=http://localhost:3005/callback CRA Docs on Adding Custom Environment Variables: Note: You must create custom environment variables beginning with REACT_APP_. Any other variables except NODE_ENV will be ignored to avoid accidentally exposing a private key on the machine that could have the … Read more

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