Category: React

Sometimes, we want to style React Material UI text field with JavaScript.

In this article, we’ll look at how to style React Material UI text field with JavaScript.

How to style React Material UI text field with JavaScript?

To style React Material UI text field with JavaScript, we can use the sx or inputProps prop.

For instance, we write

<TextField sx={{ marginTop: 10 }} inputProps={{ sx: { color: "#fff" } }} />;

to set the sx prop to an object with the styles for the text field.

We also set inputProps to an object with the sx property set to an object with the styles to style the text field.

Conclusion

To style React Material UI text field with JavaScript, we can use the sx or inputProps prop.

Sometimes, we want to render React components with promises inside the render method.

In this article, we’ll look at how to render React components with promises inside the render method.

How to render React components with promises inside the render method?

To render React components with promises inside the render method, we use the react-promise library.

To install it, we run

npm i react-promise

Then we use it by writing

import usePromise from "react-promise";

const ExampleWithAsync = (props) => {
  const { value, loading } = usePromise(prom);
  if (loading) {
    return null;
  }
  return <div>{value}</div>;
};

We call the usePromise hook with the prom promise.

And we get the resolve value of prom from value.

If loading is true, then prom is being run.

Conclusion

To render React components with promises inside the render method, we use the react-promise library.

Sometimes, we want to render repeating React elements.

In this article, we’ll look at how to render repeating React elements.

How to render repeating React elements?

To render repeating React elements, we use the array map method.

For instance, we write

<table>
  {[...Array(3)].map((_, index) => (
    <tr key={index} />
  ))}
</table>;

to call map on an array with a callback that returns tr elements.

We set the key prop to a unique value so React can identify each item rendered.

Conclusion

To render repeating React elements, we use the array map method.

Sometimes, we want to fix Objects are not valid as a React child (found: [object Promise]) error.

in this article, we’ll look at how to fix Objects are not valid as a React child (found: [object Promise]) error.

How to fix Objects are not valid as a React child (found: [object Promise]) error?

To fix Objects are not valid as a React child (found: [object Promise]) error, we sure make sure we aren’t creating function components with async functions.

For instance, we write

const HelloApp = (props) => {
  return (
    <div>
      <h2>Hello World</h2>
    </div>
  );
};
ReactDOM.render(<HelloApp />, document.querySelector("#app"));

to create the HelloApp component with a regular JavaScript function.

Then this error should go away since regular functions can return JSX.

Conclusion

To fix Objects are not valid as a React child (found: [object Promise]) error, we sure make sure we aren’t creating function components with async functions.

Sometimes, we want to intercept or handle browser’s back button in React Router v5.

In this article, we’ll look at how to intercept or handle browser’s back button in React Router v5.

How to intercept or handle browser’s back button in React Router v5?

To intercept or handle browser’s back button in React Router v5, we can use the Prompt component.

For instance, we write

<Prompt
  message={(location, action) => {
    if (action === "POP") {
      // ...
    }
    return true;
  }}
/>;

to add the Prompt component with the message prop set to a function that runs when we navigate.

In it, we check if action is 'POP'.

If it is, then we’re navigating with the back button.

Conclusion

To intercept or handle browser’s back button in React Router v5, we can use the Prompt component.