React Review Stars

An example project for rendering review stars for a single average review, taking rating and maxRating as parameters.

Here's the heart of the code, where we determine the number of full stars, empty stars, and the inevitable partial star that exists between them.

const renderStars = (rating, maxRating) => {
  const baseRating = basify(rating),
    hasPartialStar = rating % 1 > 0,
    fullStars = Array.from(new Array(baseRating), (star, i) => <Star key={i}>★</Star>),
    emptyStarCount = rating >= maxRating - 1 ? 0 : maxRating - baseRating - 1,
    emptyStars = Array.from(new Array(emptyStarCount), (star, i) => <Star key={i}>☆</Star>);

  return (
    <React.Fragment>
      <figure style={{ display: 'flex' }}>
        {fullStars.map(star => star)}
        {hasPartialStar && (
          <PartialStarContainer>
            <PartialStar percent={ratingPercent(rating % 1, 1)}>★</PartialStar>
            <Star>☆</Star>
          </PartialStarContainer>
        )}
        {emptyStars.length > 0 && emptyStars.map(star => star)}
      </figure>
    </React.Fragment>
  );
};

This project was bootstrapped with Create React App.

Available Scripts

In the project directory, you can run:

npm start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

Learn More

You can learn more in the Create React App documentation.