Implementation of React star rating component

<StarScore score={data.wm_poi_score}/>

let wm_poi_score = this.props.score || '';
let score = wm_poi_score.toString();
let scoreArray = score.split('.');

// Full star number let fullstar = parseInt(scoreArray[0]);
// Number of half stars let halfstar = parseInt(scoreArray[1]) >= 5 ? 1 : 0;
// Number of gray stars let nullstar = 5 - fullstar - halfstar;

let starjsx = [];
// Render full stars for (let i = 0; i < fullstar; i++) {
  starjsx.push(<div key={i + 'full'} className="star fullstar"></div>)
}
// Render half star if (halfstar) {
  for (let j = 0; j < halfstar; j++) {
    starjsx.push(<div key={j + 'half'} className="star halfstar"></div>)
  }
}
// Render gray star if (nullstar) {
  for (let k = 0; k < nullstar; k++) {
    starjsx.push(<div key={k + 'null'} className="star nullstar"></div>)
  }
}

<div className="star-area">
  {this.renderStar()}
</div>

doEva(i) {
  this.setState({
    startIndex: i + 1
  });
}

renderStar() {
  let array = []
  for (let i = 0; i < 5; i++) {
    let cls = i >= this.state.startIndex ? "star-item" : "star-item light"
    array.push(
      <div onClick={() => this.doEva(i)} key={i} className={cls}></div>
    )
  }
  return array
}

import React from 'react';
import './StarScore.scss';

// Render 5 star score method class StarScore extends React.Component {
  renderScore() {
    let wm_poi_score = this.props.score || '';
    let score = wm_poi_score.toString();
    let scoreArray = score.split('.');
    // Full star number let fullstar = parseInt(scoreArray[0]);
    // Number of half stars let halfstar = parseInt(scoreArray[1]) >= 5 ? 1 : 0;
    // Number of gray stars let nullstar = 5 - fullstar - halfstar;
    let starjsx = [];

    // Render full stars for (let i = 0; i < fullstar; i++) {
      starjsx.push(<div key={i + 'full'} className="star fullstar"></div>)
    }
    // Render half star if (halfstar) {
      for (let j = 0; j < halfstar; j++) {
        starjsx.push(<div key={j + 'half'} className="star halfstar"></div>)
      }
    }
    // Render gray star if (nullstar) {
      for (let k = 0; k < nullstar; k++) {
        starjsx.push(<div key={k + 'null'} className="star nullstar"></div>)
      }
    }
    return starjsx;
  }
  render() {
    return <div className="star-score">{this.renderScore()}</div>;
  }
}

export default StarScore;

.star-score {
  .star {
    width: 10px;
    height: 10px;
    float: left;
    background-size: cover;
  }

  .fullstar {
    background-image: url('./img/fullstar.png');
  }

  .halfstar {
    background-image: url('./img/halfstar.png');
  }

  .nullstar {
    background-image: url('./img/gray-star.png');
  }
}

import './Main.scss';
import React from 'react';

class Main extends React.Component {
  constructor(props) {
    super(props);
    }
  }
  
  /**
   * Click to rate */
  doEva(i) {
    this.setState({
      startIndex: i + 1
    });
  }
  /**
   * Stars for rendering rating */
  renderStar() {
    let array = []
    for (let i = 0; i < 5; i++) {
      let cls = i >= this.state.startIndex ? "star-item" : "star-item light"
      array.push(
        <div onClick={() => this.doEva(i)} key={i} className={cls}></div>
      )
    }
    return array
  }
  render() {
    return (
      <div className="content">
        <div className="star-area">
            {this.renderStar()}
          </div>
      </div>
    );
  }
}

export default Main;

.content {
  height: 100%;
  .eva-content {
    background-color: #fff;
    overflow: hidden;
    margin: px2rem(10px);
    margin-top: px2rem(74px);
  }
  .star-area {
    text-align: center;
    margin-top: px2rem(30px);
  }
  .star-item {
    width: px2rem(32px);
    height: px2rem(32px);
    background-image: url('./img/gray-star.png');
    background-size: cover;
    display: inline-block;
    margin-right: px2rem(10px);

    &.light {
      background-image: url('./img/light-star.png');
    }
  }
}