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VisualizaçõesReact error in console - Maximum update depth exceeded when input length is more than 5
I have an input component that accepts input upto 5 characters. When the input length is more that 5, it shows a message Limit Exceeds (only upto 5 characters accepted).
Sample component code :
import { useEffect, useState } from "react";
export function ConditionalInput() {
const [inputInfo, setInputInfo] = useState({ value: "", lengthCount: 0 });
const [warningMessageVisible, setWarningMessageVisible] = useState(false);
useEffect(() => {
if (inputInfo.value.length > 5) {
setInputInfo((s) => ({ ...s, lengthCount: 0 }));
}
}, [inputInfo, warningMessageVisible]);
const onChange = ({ target }) => {
setInputInfo((s) => ({ ...s, value: target.value }));
if (target.value.length > 5) {
setWarningMessageVisible(true);
}
};
return (
<div>
<input type="text" value={inputInfo.value} onChange={onChange} />
<div>Number of secrets: {inputInfo.lengthCount}</div>
{warningMessageVisible && (
<h3>Limit Exceeds (only upto 5 characters accepted)</h3>
)}
</div>
);
}On the UI everything looks ok but in the console I can see an error message printing in an infinite loop stating - Maximum update depth exceeded
Note - Above code is not the actual code I'm using but a mock of it. It have the same error and working
How can I fix this error showing in console? any advise or answer is appreciated
3 Respostas
Responde à pergunta0
It's because of the dependencies array you've added setInputInfo Your useEffect will trigger whenever there is a change in the inputInfo. And inside the useEffect you're modifying the inputInfo. So basically it's creating an infinite loop which will keep rendering the view.
To fix that you can remove inputInfo from the dependency array of your useEffect.
0
This issue happen from this useEffect
useEffect(() => {
if (inputInfo.value.length > 5) {
setInputInfo((s) => ({ ...s, lengthCount: 0 }));
}
}, [inputInfo, warningMessageVisible]);
This useEffect alway run when inputInfo change. So you need to remove the inputInfo at this useEffect like this:
useEffect(() => {
if (inputInfo.value.length > 5) {
setInputInfo((s) => ({ ...s, lengthCount: 0 }));
}
}, [warningMessageVisible]);
0
You need to do the following changes in your code :
- remove inputInfo from useEffect dependencies
- instead of using
infoInput.lengthCountuseinfoInput.value.lengthto show the length count.
Below is the working code
import { useEffect, useState } from "react";
export function ConditionalInput() {
const [inputInfo, setInputInfo] = useState({ value: "", lengthCount: 0 });
const [warningMessageVisible, setWarningMessageVisible] = useState(false);
useEffect(() => {
if (inputInfo.value.length > 5) {
setInputInfo((s) => ({ ...s, lengthCount: 0 }));
}
}, [warningMessageVisible]);
const onChange = ({ target }) => {
setInputInfo((s) => ({ ...s, value: target.value }));
if (target.value.length > 5) {
setWarningMessageVisible(true);
}
};
return (
<div>
<input type="text" value={inputInfo.value} onChange={onChange} />
<div>Number of secrets: {inputInfo.value.length}</div>
{warningMessageVisible && (
<h3>Limit Exceeds (only upto 5 characters accepted)</h3>
)}
</div>
);
}