質問編集履歴
2
書式の改善
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https://www.gatsbyjs.org/packages/gatsby-image/#art-directing-multiple-images
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```jsx
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import React from "react"
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import { graphql } from "gatsby"
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import Img from "gatsby-image"
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export default ({ data }) => {
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// Set up the array of image data and `media` keys.
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// You can have as many entries as you'd like.
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const sources = [
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data.mobileImage.childImageSharp.fluid,
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{
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...data.desktopImage.childImageSharp.fluid,
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media: `(min-width: 768px)`,
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},
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]
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return (
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<div>
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<h1>Hello art-directed gatsby-image</h1>
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<Img fluid={sources} />
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</div>
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)
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}
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export const query = graphql`
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query {
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mobileImage: file(relativePath: { eq: "blog/avatars/kyle-mathews.jpeg" }) {
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childImageSharp {
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fluid(maxWidth: 1000, quality: 100) {
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...GatsbyImageSharpFluid
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}
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}
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}
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desktopImage: file(
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relativePath: { eq: "blog/avatars/kyle-mathews-desktop.jpeg" }
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) {
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childImageSharp {
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fluid(maxWidth: 2000, quality: 100) {
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...GatsbyImageSharpFluid
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}
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}
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}
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}
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`
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```
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こちらを参考にしながら試行錯誤しているもののなかなかうまくいきません。
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1
書式の改善
test
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File without changes
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test
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@@ -4,7 +4,103 @@
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画像の取り扱いについて
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```ここに言語を入力
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import React from 'react'
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import { StaticQuery, graphql } from 'gatsby'
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import Img from 'gatsby-image'
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// 画像ファイルパスをプロパティに取るようなコンポーネントを定義
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export default ({ filename }) => (
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// ページじゃないコンポーネントでもGraphQLが使えるように
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// StaticQueryタグを使う
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<StaticQuery
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// GraphQLのクエリ引数には何も指定しない！
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query={graphql`
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query {
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images: allFile {
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edges {
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node {
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relativePath
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name
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childImageSharp {
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sizes(maxWidth: 800) {
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...GatsbyImageSharpSizes
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}
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}
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}
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}
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}
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}
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`}
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// 全画像情報がdataに代入されている
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render={(data) => {
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// 指定した画像ファイルパス（コンポーネントのプロパティ）と
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// 一致するgatsby-image用の情報を取得
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const image = data.images.edges.find(n => {
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return n.node.relativePath.includes(filename)
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})
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if (!image) return
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// Imgタグでgatsby-imageで最適化された画像を表示する
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const imageSizes = image.node.childImageSharp.sizes
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return <Img sizes={imageSizes} />
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}}
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/>
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)
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```
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上記を参考に、パスを渡せばgatsby-imageで画像を表示はできるのですが、
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