facebook - this.state.text.split() is undefined error when using onSubmitEditing -


according facebook's official documentation:

onchangetext takes function called every time text changes

and

onsubmitediting takes function called when text submitted

i'm following official facebook tutorial on text input handling, code:

export default class pizzatranslator extends component {   constructor(props) {     super(props);     this.state = {text: ''};   }    render() {     return (       <view style={{padding: 10}}>         <textinput           style={{height: 40}}           placeholder="type here translate!"           onchangetext={(text) => this.setstate({text})}         />         <text style={{padding: 10, fontsize: 42}}>           {this.state.text.split(' ').map((word) => word && '🍕').join(' ')}         </text>       </view>     );   } }

takes sentence , change of words 🍕 emojis, if change onchangetext onsubmitediting, error saying this.state.text.split not function. (in 'this.state.text.split('')', 'this.state.text.split' undefined) when submit text.

the documentation correct on point, both onchangetext , onsubmitediting take callback function executed. essential difference argument supplied callback function. onchangetext gives new value string , onsubmitediting executes callback function object first argument. can view result using

<textinput   onchangetext={(text) => {this.setstate({text}); console.warn('text', text);}}   onsubmitediting={(argument) => console.warn(object.keys(argument))} />

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