Why doesn't the image from the external link work in gatsby? - node.js

Question

Excuse me, please, I am just learning. In some gatsby templates I can insert as Image - an image from a URL and in some templates Image don't want to display it.
What does it depend on and how to edit the code to make the url work? (My knowledge about graphql is rather basic)
this is the code for the blog template:
/** #jsx jsx */
import { jsx } from 'theme-ui'
import { Link, graphql } from "gatsby"
import Img from "gatsby-image"
import { RiArrowRightLine, RiArrowLeftLine } from "react-icons/ri"
import Layout from "../components/layout"
import SEO from '../components/seo';
const styles = {
'article blockquote': {
'background-color': 'cardBg'
},
pagination: {
'a': {
color: 'muted',
'&.is-active': {
color: 'text'
},
'&:hover': {
color: 'text'
}
}
}
}
const Pagination = (props) => (
<div
className="pagination -post"
sx={styles.pagination}
>
<ul>
{(props.previous && props.previous.frontmatter.template === 'blog-post') && (
<li>
<Link to={props.previous.frontmatter.slug} rel="prev">
<p
sx={{
color: 'muted'
}}
>
<span className="icon -left"><RiArrowLeftLine/></span> Previous</p>
<span className="page-title">{props.previous.frontmatter.title}</span>
</Link>
</li>
)}
{(props.next && props.next.frontmatter.template === 'blog-post') && (
<li>
<Link to={props.next.frontmatter.slug} rel="next">
<p
sx={{
color: 'muted'
}}
>Next <span className="icon -right"><RiArrowRightLine/></span></p>
<span className="page-title">{props.next.frontmatter.title}</span>
</Link>
</li>
)}
</ul>
</div>
)
const Post = ({ data, pageContext }) => {
const { markdownRemark } = data // data.markdownRemark holds your post data
const { frontmatter, html, excerpt } = markdownRemark
const Image = frontmatter.featuredImage ? frontmatter.featuredImage.childImageSharp.fluid : ""
const { previous, next } = pageContext
let props = {
previous,
next
}
return (
<Layout className="page">
<SEO
title={frontmatter.title}
description={frontmatter.description ? frontmatter.description : excerpt}
image={Image}
article={true}
/>
<article className="blog-post">
<header className="featured-banner">
<section className="article-header">
<h1>{frontmatter.title}</h1>
<time>{frontmatter.date}</time>
</section>
{Image ? (
<Img
fluid={Image}
objectFit="cover"
objectPosition="50% 50%"
alt={frontmatter.title + ' - Featured image'}
className="featured-image"
/>
) : ""}
</header>
<div
className="blog-post-content"
dangerouslySetInnerHTML={{ __html: html }}
/>
</article>
{(previous || next) && (
<Pagination {...props} />
)}
</Layout>
)
}
export default Post
export const pageQuery = graphql`
query BlogPostQuery($id: String!) {
markdownRemark(
id: { eq: $id }
) {
id
html
excerpt(pruneLength: 148)
frontmatter {
date(formatString: "MMMM DD, YYYY")
slug
title
description
featuredImage {
childImageSharp {
fluid(maxWidth: 1980, maxHeight: 768, quality: 80, srcSetBreakpoints: [350, 700, 1050, 1400]) {
...GatsbyImageSharpFluid
...GatsbyImageSharpFluidLimitPresentationSize
}
sizes {
src
}
}
}
}
}
}
`
typical post:
---
template: blog-post
title: my title
slug: /plant/bud
date: 2020-05-13 12:37
description: abc
featuredImage: /assets/screen-post-hixmjdah9xhoo-unsplash.jpg (but online image from imgurl png doesnt work)
---
post nr 1
edited ///
plugins: [
{
resolve: `gatsby-source-filesystem`,
options: {
path: `${__dirname}/static/assets/`,
name: `assets`,
},
},
{
resolve: `gatsby-source-filesystem`,
options: {
path: `${__dirname}/src/content/`,
name: `content`,
},
},
`gatsby-transformer-sharp`,
`gatsby-plugin-sharp`,
{
resolve: `gatsby-transformer-remark`,
options: {
gfm: true,
plugins: [
netlifyCmsPaths,
`gatsby-remark-reading-time`,
{
resolve: `gatsby-remark-images`,
options: {
maxWidth: 1024,
showCaptions: true,
linkImagesToOriginal: false,
tracedSVG: true,
loading: "lazy",
},
},
`gatsby-remark-responsive-iframe`,
{
resolve: `gatsby-remark-prismjs`,
options: {
classPrefix: "language-",
inlineCodeMarker: null,
aliases: {},
showLineNumbers: false,
noInlineHighlight: false,
// By default the HTML entities <>&'" are escaped.
// Add additional HTML escapes by providing a mapping
// of HTML entities and their escape value IE: { '}': '{' }
escapeEntities: {},
},
},
],
},
},

Answer 1

In Gatsby, you can insert images from external sources using the standard HTML <img> tag with the src property:
<img src="https://via.placeholder.com/150" alt="Alt text" width="500" height="600">
If you want to keep the benefits of gatsby-image across the external (or online) images, you should need to use some dependencies to achieve lazy loading and other features.
However, to use gatsby-image you need to allow Gatsby and the inferred GraphQL schema to use their transformers (gatsby-transformer-sharp and sharps (gatsby-plugin-sharp) across with the filesystem (gatsby-source-filesystem) or in other words, Gatsby needs to have access to the images that needs to parse to create a valid queryable GraphQL schema, that will be consumed with the gatsby-image.
In addition, you need to specify the folder of your project where those images belong (setting the filesystem):
const path = require(`path`)
module.exports = {
plugins: [
{
resolve: `gatsby-source-filesystem`,
options: {
name: `images`,
path: path.join(__dirname, `src`, `images`),
},
},
`gatsby-plugin-sharp`,
`gatsby-transformer-sharp`,
],
}
Once the filesystem is set and the images are processed, a GraphQL node is created, and you are allowed to use the fragments like the one you've provided:
featuredImage {
childImageSharp {
fluid(maxWidth: 1980, maxHeight: 768, quality: 80, srcSetBreakpoints: [350, 700, 1050, 1400]) {
...GatsbyImageSharpFluid
...GatsbyImageSharpFluidLimitPresentationSize
}
sizes {
src
}
}
}
Since the external images can't be directly processed by Gatsby, they can't be used with gatsby-image. Depending on the source of those images, some plugins allow you to keep using gatsby-image from external sources (usually from CMSs like Contentful and others).
You can check for further documentation in Working with images docs.
Update (01/06/2021)
In the last Gatsby version (v2.30) they've added a new experimental feature, still in beta to support external images in a <StaticImage> component. To enable it, just upgrade to the latest Gatsby version (via npm or yarn) and add the following flags in your running scripts:
GATSBY_EXPERIMENTAL_REMOTE_IMAGES=1 gatsby develop
GATSBY_EXPERIMENTAL_REMOTE_IMAGES=1 gatsby build
You can then pass absolute URLs to StaticImage:
<StaticImage src="https://placekitten.com/400/400" alt="Kittin" />