setState doesn't update the state immediately [duplicate]

ghz 1years ago ⋅ 10026 views

Question

This question already has answers here :

[Why does calling react setState method not mutate the state immediately?](/questions/30782948/why-does-calling-react-setstate-method-not- mutate-the-state-immediately) (10 answers)

[The useState set method is not reflecting a change immediately](/questions/54069253/the-usestate-set-method-is-not-reflecting-a- change-immediately) (19 answers)

Closed 1 year ago.

I would like to ask why my state is not changing when I do an onClick event. I've search a while ago that I need to bind the onClick function in constructor but still the state is not updating.

Here's my code:

import React from 'react';
import Grid from 'react-bootstrap/lib/Grid';
import Row from 'react-bootstrap/lib/Row';
import Col from 'react-bootstrap/lib/Col';
import BoardAddModal from 'components/board/BoardAddModal.jsx';    
import style from 'styles/boarditem.css';

class BoardAdd extends React.Component {
    constructor(props) {
        super(props);    
        this.state = {
            boardAddModalShow: false
        };    
        this.openAddBoardModal = this.openAddBoardModal.bind(this);
    }

    openAddBoardModal() {
        this.setState({ boardAddModalShow: true }); // set boardAddModalShow to true

        /* After setting a new state it still returns a false value */
        console.log(this.state.boardAddModalShow);   
    }

    render() {    
        return (
            <Col lg={3}>
                <a href="javascript:;" 
                   className={style.boardItemAdd} 
                   onClick={this.openAddBoardModal}>
                    <div className={[style.boardItemContainer,
                                     style.boardItemGray].join(' ')}>
                        Create New Board
                    </div>
                </a>
            </Col>
        );
    }
}

export default BoardAdd

Answer

This callback is really messy. Just use async await instead:

async openAddBoardModal(){
    await this.setState({ boardAddModalShow: true });
    console.log(this.state.boardAddModalShow);
}
#javascript