68 lines
1.3 KiB
JavaScript
68 lines
1.3 KiB
JavaScript
import React from 'react';
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import PropTypes from 'prop-types';
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export default class ImageLoader extends React.PureComponent {
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static propTypes = {
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alt: PropTypes.string,
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src: PropTypes.string.isRequired,
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previewSrc: PropTypes.string.isRequired,
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width: PropTypes.number.isRequired,
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height: PropTypes.number.isRequired,
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}
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static defaultProps = {
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alt: '',
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};
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state = {
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loading: true,
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error: false,
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}
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componentWillMount() {
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this._loadImage(this.props.src);
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}
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componentWillReceiveProps(props) {
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this._loadImage(props.src);
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}
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_loadImage(src) {
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const image = new Image();
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image.onerror = () => this.setState({ loading: false, error: true });
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image.onload = () => this.setState({ loading: false, error: false });
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image.src = src;
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this.setState({ loading: true });
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}
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render() {
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const { alt, src, previewSrc, width, height } = this.props;
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const { loading } = this.state;
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return (
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<div className='image-loader'>
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<img
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alt={alt}
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className='image-loader__img'
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src={src}
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width={width}
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height={height}
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/>
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{loading &&
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<img
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alt=''
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src={previewSrc}
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className='image-loader__preview-img'
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/>
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}
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</div>
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);
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}
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}
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