javascript - CSS 不透明度过渡不适用于 Safari

Question

我正在尝试实现某种惰性背景图像加载。我希望图像在加载后立即淡入。因此，我在加载时更改了 holding div 的不透明度。 它适用于 Chrome 或 Firefox，但不知何故不适用于 Safari。使用 Safari 时，图像只显示而没有任何过渡。为何如此？

import React, {Component} from 'react';

import './ImageHolder.css'

class LazyImage extends Component {

    state = {
        src: null,
    };

    componentDidUpdate(prevProps, prevState, snapshot) {

        if (prevProps.image !== this.props.image) {
            this.setState({src: null});
            this.loadImage();
        }
    }

    componentDidMount() {
        this.loadImage();
    }

    loadImage = () => {
        const src = this.props.image;

        const imageLoader = new Image();
        imageLoader.src = src;

        imageLoader.onload = () => {
            this.setState({src: src})
        };
    };

    classList = (classes) => {
        return Object
            .entries(classes)
            .filter(entry => entry[1])
            .map(entry => entry[0])
            .join(' ');
    };

    render() {
        const style = {
            backgroundImage: 'url(' + this.state.src + ')',
        };

        return(
            <div className="h-image-wrapper" style={{backgroundColor: this.props.bgColor}}>
                <div className={this.classList({
                    'h-image-holder': true,
                    'h-image-loaded': this.state.src,
                })} style={style} />
            </div>
        );
    }
}

export default LazyImage;

.h-image-holder {
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    will-change: opacity, transform;
    pointer-events: none;
    opacity: 0;
    width: 100%;
    height: 100%;
    transition: opacity .6s ease;
    -webkit-transition: opacity .6s ease;
}

.h-image-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    will-change: transform;
    pointer-events: none;
}

.h-image-loaded {
    opacity: 1;
}

Answer 1

也许这会有所帮助。关于Safari CSS Visual Effects Guide据说你必须使用这个:

-webkit-transition-property: opacity;

您还可以更改它的持续时间:

-webkit-transition-duration: 2s;"