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changing state value react

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Old-fashioned Ostrich answered on January 9, 2021 Popularity 10/10 Helpfulness 2/10

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changing state value react

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  const [a, b] = React.useState(['hi','world']);
  const dup = [...a]; //won't work without spread operator
  b(dup);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript state

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Contributed on Aug 23 2021

Old-fashioned Ostrich

0 Answers Avg Quality 2/10

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change state in react

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import React, {Component} from 'react';

class ButtonCounter extends Component {
  constructor() {
    super()
    // initial state has count set at 0
    this.state = {
      count: 0
    }
  }

  handleClick = () => {
    // when handleClick is called, newCount is set to whatever this.state.count is plus 1 PRIOR to calling this.setState
    let newCount = this.state.count + 1
    this.setState({
      count: newCount
    })
  }

  render() {
    return (
      <div>
        <h1>{this.state.count}</h1>
        <button onClick={this.handleClick}>Click Me</button>
      </div>
    )
  }
}

export default ButtonCounter

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: learn.co

Tags: javascript j

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Contributed on Jan 12 2021

Tense Tapir

0 Answers Avg Quality 2/10

react change state

Comment

 // React change state
this.setState({state to change:value});

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 09 2021

Eitan Feinberg

0 Answers Avg Quality 2/10

how to update state in react

Comment

// Correct
this.setState(function(state, props) {
  return {
    counter: state.counter + props.increment
  };
});

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: reactjs.org

Tags: javascript j

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Contributed on May 09 2021

Cute Curlew

0 Answers Avg Quality 2/10

update state in react

Comment

You have to use setState() for updating state in React
{
  hasBeenClicked: false,
  currentTheme: 'blue',
}

setState({
	hasBeenClicked: true
});

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Feb 23 2021

Wrong Wasp

0 Answers Avg Quality 2/10

changing state value react

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