Using props I was able to effectively pass state upwards from my child component to its parent, but a change in the state does not cause a re-render of the page.
import React, { useState } from "react";
import "./styles.css";
export default function App() {
const AddToList = (item) => {
setText([...text, item]);
};
const removeFromList = (item) => {
const index = text.indexOf(item);
text.splice(index, 1);
};
const [text, setText] = React.useState(["default"]);
return (
<div className="App">
<div>
<button
onClick={() => {
AddToList("hello");
}}
>
Add
</button>
</div>
{text.map((item) => {
return <ChildComponent text={item} removeText={removeFromList} />;
})}
</div>
);
}
const ChildComponent = ({ text, removeText }) => {
return (
<div>
<p>{text}</p>
<button
onClick={() => {
removeText(text);
}}
>
Remove
</button>
</div>
);
};
In the snippet, each time AddToList is called, a new child component is created and the page is re-rendered reflecting that. However, when i call removeFromList on the child component, nothing happens. The page stays the same, even though I thought this would reduce the number of childComponents present on the page. This is the problem I’m facing.