react setstate object

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showing results for - "react setstate object"
Soumaya
19 May 2016
1this.setState(prevState => {
2  let jasper = Object.assign({}, prevState.jasper);  // creating copy of state variable jasper
3  jasper.name = 'someothername';                     // update the name property, assign a new value                 
4  return { jasper };                                 // return new object jasper object
5})
6
7//2ND METHOD
8
9this.setState(prevState => ({
10    jasper: {                   // object that we want to update
11        ...prevState.jasper,    // keep all other key-value pairs
12        name: 'something'       // update the value of specific key
13    }
14}))
Jean-Baptiste
03 May 2020
1import React, { useState } from 'react'
2const Example = () => {
3  const [ account, setAccount ] = useState({ username: "", password: "" })
4	return(
5      <div>
6      <p>Debug { JSON.stringify(account) }
7		<form>
8          <input 
9			text="text" 
10			placeholder="Username"
11			onChange={(e) => {
12              setAccount({ ...account, username: e.terget.value })
13            }}
14		  />
15		  </br>
16		  <input 
17			text="text" 
18			placeholder="Password"
19			onChange={(e) => {
20              setAccount({ ...account, password: e.terget.value })
21            }}
22		  />      
23	  </form>
24      </div>
25    )
26  }
27  
28 https://www.youtube.com/watch?v=nWGcOTyTkQ0&t=457s
Sofie
15 Jun 2017
1this.setState(prevState => ({
2  food: {
3    ...prevState.food,           // copy all other key-value pairs of food object
4    pizza: {                     // specific object of food object
5      ...prevState.food.pizza,   // copy all pizza key-value pairs
6      extraCheese: true          // update value of specific key
7    }
8  }
9}))
Alexus
18 Jul 2018
1this.setState({
2	lang1:{
3		...this.state.lang1,
4		name: "myExample"
5	}
6})
Charissa
08 Jan 2018
1this.state = {
2   jasper: { name: 'jasper', age: 28 },
3}
4
5this.setState({
6    jasper: {
7          ...this.state.jasper,
8          name: 'something'
9    }
10})
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