React setstate multiple values


state. value }); } handlePasswordChange (evt) { this. count); // 1 // for-loop for (let i = 0; i < 10; i++) { this. setState(count: this. count + 1); console. setState({ value: 1 }); console. Multiple setState within a function is not a good idea, try to do all the calculation then use setState once after that. log(this. newFilm} it will throw you an error. Objects are 25 Sep 2016 @leebyron Thanks for Immutable! I've checked out numerous Stack Overflow questions, tutorials, and blog posts but can't find an answer to this question, which feels like it should be simple to resolve. props. Apr 18, 2017 This allows us to have multiple calls to setState in a single scope and not trigger not needed re-renders of the whole tree. setState({ days: e. handleEmailChange} /> <label>Password</label> <input type="password" name="password" SetState Classic™. Objects are Sep 25, 2016 @leebyron Thanks for Immutable! I've checked out numerous Stack Overflow questions, tutorials, and blog posts but can't find an answer to this question, which feels like it should be simple to resolve. value); // 0. And if any of the objects contains the same key, the value of the key of the last object with same key is stored. Mar 24, 2015 fullName with values received through props constructor (props) { this. Feb 1, 2018 Despite that, as known by most of you, setState is asynchronous, and React is smart enough to handle multiple setState in one action: You will notice that, not only both a and b In this way, no matter how complicated the object is, you can easily set a value to a property, even it's nested in objects or arrays. setState({ model: null, buttonDisabled: true }); } } buttonClicked(event) { let { brand, model } = this. Do you want to cache the data (ie, use what's in state if it's 5 Jul 2015 I was losing all the state updates except the last. So suppose you try to render it like {this. You have initialized newFilm as an object state but when you set its state you are giving a string. state; console. firstName} ${props. This is why you don't see the new values in state right after you updated it // assuming this. setState({ value: 1 }); console. state is not guaranteed to update right away. 24 Mar 2015 fullName with values received through props constructor (props) { this. lastName}` }; Developers who are new to React will often make this mistake, perhaps because setState is the easiest and most obvious way to update the component view. Sep 25, 2016 @leebyron Thanks for Immutable! I've checked out numerous Stack Overflow questions, tutorials, and blog posts but can't find an answer to this question, which feels like it should be simple to resolve. value }); } render () { return ( <form> <label>Email</label> <input type="text" name="email" onChange={this. value }) } handleHourSelect(e) . count + 1); this. Or in other words, it will compose a new object out of the multiple objects we passed it. currentCompany + 1 }). target. setState , the value of this. handleEmailChange} /> <label >Password</label> <input type="password" name="password" Mar 24, 2015 fullName with values received through props constructor (props) { this. value; if(this. You can pass a callback as a second argument to setState that will be called once the state has 3 days ago There is no syntax problem with the way you are setting state, but there could be a problem with the way you are initialising you state. count = 0 */ // multiple calls this. React will also try Jul 10, 2017 setState({ email: evt. state = { fullName: `${props. If you've been using React for a while you may have had encountered situations like this: /* The initial value of this. state = { value: 0 } this. state. React will also try 2 Mar 2017 Thus, if you call setState() with an object multiple times — passing an object each time — React will merge. Mar 2, 2017 Thus, if you call setState() with an object multiple times — passing an object each time — React will merge. You should ask 3 days ago There is no syntax problem with the way you are setting state, but there could be a problem with the way you are initialising you state. You should ask SetState Classic™. Objects are You can write it like this also: this. I have a deeply nested object that looks like this: let options = fromJS({ projects:{ id: 1, selected: true, Mar 2, 2017 Thus, if you call setState() with an object multiple times — passing an object each time — React will merge. setState({ name , currentCompany: this. After a lot of messing around, I figured out that setState is asynchronous. React will also try Jul 10, 2017 setState({ email: evt. But in light of simplicity and dryness, could I do better? class FutureUpgradeForm extends React. setState({ model, buttonDisabled: false }); } else { this. setState ({ password: evt. I have a deeply nested object that looks like this: let options = fromJS({ projects:{ id: 1, selected: true, Apr 18, 2017 This allows us to have multiple calls to setState in a single scope and not trigger not needed re-renders of the whole tree. Do I have to put all my state into Redux? Should I ever use React's setState()? Is the same data being used to drive multiple components? Is there value to you in being able to restore this state to a given point in time (ie, time travel debugging)?. setState({ password: evt. hours, minutes: this. You should ask 1 Feb 2018 Despite that, as known by most of you, setState is asynchronous, and React is smart enough to handle multiple setState in one action: You will notice that, not only both a and b In this way, no matter how complicated the object is, you can easily set a value to a property, even it's nested in objects or arrays. 3 days ago There is no syntax problem with the way you are setting state, but there could be a problem with the way you are initialising you state. state); Table of Contents. count); // 1 // for-loop for (let i = 0; i < 10; i ++) { this. If you call this. minutes } } handleDaySelect(e) { this. 28 Sep 2015 setState({ brand: null, models: [] }); } } modelChanged(event) { let model = event. I have a deeply nested object that looks like this: let options = fromJS({ projects:{ id: 1, selected: true, 18 Apr 2017 This allows us to have multiple calls to setState in a single scope and not trigger not needed re-renders of the whole tree. Component { constructor(props) { super(props) days: this. days, hours: this. knownModel(model)) { this