在 Next.js 中实施 Cloudinary Product Gallery

Question

我正在尝试在我的电子商务 - Next.js 项目中使用 Cloudinary Product Gallery，但很难将其组合在一起。

这里是 Cloudinary 产品库：https://cloudinary.com/documentation/product_gallery

我得到的错误： Cannot read property 'galleryWidget' of undefined。让我知道我做错了什么。

文件 - _document.js

import Document, { Html, Head, Main, NextScript } from 'next/document';

class MyDocument extends Document {
  render() {
    return (
      <Html>
        <Head />
        <body>
          <script
            src="https://product-gallery.cloudinary.com/all.js"
            type="text/javascript"
          ></script>
          <Main />
          <NextScript />
        </body>
      </Html>
    );
  }
}

export default MyDocument;

文件 - SingleProduct.jsx

import React, { useRef } from 'react';

const SingleProduct = ({ product }) => {
  const { slug } = product;
  const cloudnaryGalleryRef = useRef(null);

  if (!cloudnaryGalleryRef.current) {
    cloudnaryGalleryRef.current = window.cloudinary
      .galleryWidget({
        container: '#my-gallery',
        cloudName: 'cloudName',
        carouselStyle: 'thumbnails',
        thumbnailProps: {
          width: 75,
          height: 75,
          spacing: 4,
          navigationColor: 'green',
        },
        mediaAssets: [{ tag: slug }],
      })
      .render();
  }

  return <div id="my-gallery"></div>;
};

export default SingleProduct;

Answer 1

假设你的脚本没有问题，你需要在执行函数之前检查window是否可用..

例如

if (typeof window !== 'undefined') {
    ..... window.cloudinary.galleryWidget(.....)
}

您会注意到这在 nextjs 应用程序中会非常频繁地发生，并且您需要包括这些必要的检查，因为 next.js 在大多数情况下是服务器端生成的，并且在浏览器中加载页面之前，window 未定义。

Answer 2

这是一个可行的解决方案

import React, { useRef } from 'react';
const SingleProduct = ({ product }) => {
  const { slug } = product;
  const [loaded, setLoaded] = useState(false);

  useEffect(() => {
    const scriptTag = document.createElement('script');
    scriptTag.src = 'https://product-gallery.cloudinary.com/all.js';
    scriptTag.addEventListener('load', () => setLoaded(true));
    document.body.appendChild(scriptTag);
  }, []);

  const cloudnaryGalleryRef = useRef(null);

  useEffect(() => {
    if (!loaded) return;
    const myGallery = window.cloudinary.galleryWidget({
      container: '#my-gallery',
      cloudName: 'dhvi46rif',
      carouselStyle: 'thumbnails', // default value: included for clarity
      thumbnailProps: {
        width: 75,
        height: 75,
        spacing: 4,
        navigationColor: 'green',
      },
      mediaAssets: [{ tag: slug }],
    });
    if (!cloudnaryGalleryRef.current && typeof window !== 'undefined') {
      cloudnaryGalleryRef.current = myGallery.render();
    }
    return () => {
      cloudnaryGalleryRef.current = myGallery.destroy(); // Important To avoid memory leaks and performance issues, make sure to use the destroy method before removing the Product Gallery widget container element from your DOM.
    };
  }, [loaded, slug]);

  return <div id="my-gallery" />;
};

export default SingleProduct;

在 Next.js 中实施 Cloudinary Product Gallery

Implementing Cloudinary Product Gallery in Next.js

javascript

reactjs

next.js

cloudinary