Invalid Attempt To Spread Non Iterable Instance

Invalid Attempt To Spread Non Iterable Instance

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1 year, 5 months ago

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1 year, 5 months ago

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I am using an API to render data in cards, and each card has a heart icon which when clicked, will change the card's state to favorite. Each card has a corresponding modal (I'm using [material ui modal][1] and ) that has the heart icon as well and I need to do it so that when the heart on the modal is clicked, both the modal and the its corresponding card get the favorite state.
Initially I changed the state in the card and the modal components, and had a piece of code that looked like this:
The previous block of code handles the state, and the following is part of the returned html:
Now that I need to match the modal's state with the initial card's state, I have moved the state to the App component and I want to create an array to push the favorite items inside and trying to use the item's id:
Now when I click the heart on a card all the cards become favorite, and when I click the heart I'm getting "TypeError: Invalid attempt to spread non-iterable instance".
You're forgetting to spread your new value for favoriteBeers into an array:
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[Solved]-TypeError: Invalid attempt to spread non-iterable instance-React Native
function trySpread(object) {
let array;
try {
array = [...object];
console.log('No error', array);
} catch(error) {
console.log('error', error);
}
}

// error
trySpread({});
trySpread({foo: 'bar'});
trySpread(4);

// no error
trySpread([]);
trySpread(['foobar']);
trySpread('foobar');
let newMyObj = {...myObj} // this will works perfectly fine.Iteration is possible above way.

fetch(url, {
method: 'GET',
headers: {
Accept: 'application/json',
'Content-Type': 'application/json',
'x-sh-auth': userToken || userStoredToken,
},
})
.then(response => response.text())
.then(async responseText => {
let responseData = JSON.parse(responseText);
console.log('responseData HomeWhatsNewUser', responseData);
if (responseData.code == 200) {
setpageNumberwhatsnewap(pageNumberwhatsnewapi + 1);
setiSloding(false);
setWhatsNewAPiUser({...WhatsNewAPiUser, ...responseData});
// setWhatsNewAPiUser(responseData);
// setLoadMoreNewUserApiLink(responseData.load_more_url);
} else {
if (responseData.message === 'Your are un authorize') {
await AsyncStorage.removeItem('@userData');
await AsyncStorage.removeItem('@userToken');
props.navigation.navigate('HomeScreen');
}
Toast.show({
text1: responseData.message,
});
setiSloding(false);
}
})
.catch(error => {
setiSloding(false);
console.log(error, 'error from APi');
});
};

if(propSearch=="" || propSearch==null && this.state.currentPage!=1 && refresh!=true){
newData=[...this.state.articlesData,...response.data]
}
else{
newData=response.data
}

{
"presets": [
"module:metro-react-native-babel-preset"
],
"plugins": [
"syntax-trailing-function-commas",
"@babel/plugin-transform-flow-strip-types",
"@babel/plugin-proposal-class-properties",
"@babel/plugin-transform-regenerator",
"@babel/plugin-transform-async-to-generator",
"@babel/plugin-transform-runtime",
[
"@babel/plugin-transform-spread",
{
"loose": true
}
]
],
"sourceMaps": true
}

Copyright 2022 www.appsloveworld.com . All rights reserved.

console.log( 'No error' , array);
console.log( 'error' , error);
This is because it is a runtime error, not a “compile time” error.
Is there a line number associated with the error? Based on the question being about the spread operator I’ll assume it’s this line: newArticlesData=[...prevData,...response.data] . I assume your prevData is iterable, but is your response data? Try newArticlesData=[...prevData, response.data] ?
Here’s an example of invalid spread operator use:
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[Solved]-TypeError: Invalid attempt to spread non-iterable instance. In set an Array into state in class component-React Native
this.setState(({details}) => {return [...details, additional]})

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