ktyr report

import {
    View,
    Text,
    useSettings,
    reactExtension,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension("purchase.checkout.block.render", () => (
    <Extension />
));

function Extension() {
    const { title,left,border } = useSettings();
    const _title = title ? title : 'タイトル';
    const _left = left ? "start" : "center"
    const _border = border ? "none" : "base"
    return (
        <View display="block" padding="base" border={_border} cornerRadius="base" inlineAlignment={_left}>
            <Text size="base" emphasis="bold">{_title}</Text>
        </View>
    );
}

　
shopify.extension.tomlに追記

[extensions.settings]
[[extensions.settings.fields]]
key = "title"
type = "single_line_text_field"
name = "表示する文言"
description = "表示する文言を入力してください"
[[extensions.settings.fields]]
key = "left"
type = "boolean"
name = "テキストを左寄せにする"
[[extensions.settings.fields]]
key = "border"
type = "boolean"
name = "枠線を表示しない"

Checkout.jsx

import {
    Banner,
    TextBlock,
    reactExtension,
    useSettings,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension("purchase.checkout.block.render", () => (
    <Extension />
));
function Extension() {
    const { title,desc,banner_status } = useSettings();
    const _title = title ? title : '';
    const _desc = desc ? desc : '';
    const _banner_status = banner_status ? banner_status : 'warning';
    const descs = _desc.split("\n").map((item,i)=>{
    return <TextBlock size="base" appearance={_banner_status}>{item}</TextBlock>
    });
    return (
    <Banner title={_title} status={_banner_status}>
        {descs}
    </Banner>
    );
}

shopify.extension.tomlに追記

[extensions.settings]
[[extensions.settings.fields]]
key = "title"
type = "single_line_text_field"
name = "表示するタイトル"
description = "表示するタイトルを入力してください"
[[extensions.settings.fields]]
key = "desc"
type = "multi_line_text_field"
name = "表示する文言"
description = "表示する文言を入力してください"
[[extensions.settings.fields]]
key = "banner_status"
type = "single_line_text_field"
name = "バナーの状態"
[[extensions.settings.fields.validations]]
name = "choices"
value = '["info", "success","warning","critical"]'

import {
  View,
  Text,
  Grid,
  GridItem,
  Link,
  Divider,
  useApi,
  useAttributeValues,
  useSettings,
  reactExtension,
} from '@shopify/ui-extensions-react/checkout';

export default reactExtension("purchase.checkout.block.render", () => (
  <Extension />
));

function Extension() {
  const { attributes_lines,hide_empty,hide_edit } = useSettings();
  const attributeKeys = attributes_lines ? attributes_lines.split("\n") : [];
  if(!attributeKeys.length){
    return '';
  }
  let i,j,tmp;
  let key,value;
  /* 指定キーのattributeを表示 */
  const attributeValues = attributeKeys.length ? useAttributeValues(attributeKeys) : [];
  const { shop } = useApi();
  const cartUrl = shop.storefrontUrl.replace(/\/$/,'') + '/cart';
  const rowSpan = attributeKeys.length + 1;
  let rows = [];
  let attributeKeysIndexList = [];
  for (i=0;i<attributeKeys.length;i++) {
    value = i < attributeValues.length ? attributeValues[i] : ' ';
    if(value){
      if(!hide_empty || (hide_empty && value.replace(/[ 　]+/g,'') != '')){
        attributeKeysIndexList.push(i);
      }
    }
  }
  for (j=0;j<attributeKeysIndexList.length;j++) {
    i = attributeKeysIndexList[j];
    /* ラベル */
    key = attributeKeys[i];
    tmp = attributesAltLineKeyValues.find((elm) => elm[0] == key);
    if(tmp && 1 < tmp.length && tmp[1]){
      key = tmp[1];
    }
    /* 値 */
    value = i < attributeValues.length ? attributeValues[i] : ' ';
    rows.push(<View border="none" padding="base" key={`${j}_key`}><Text size="base">{key}</Text></View>);
    rows.push(<View border="none" padding="base" key={`${j}_value`}><Text size="base">{value}</Text></View>);
    if(j < 1 && !hide_edit){
      rows.push(
      <GridItem rowSpan={rowSpan} spacing="base" key={`${j}_griditem`}>
        <View border="none" padding="base" key={`${j}_grid`}>
          <Link to={cartUrl} padding="none">変更</Link>
        </View>
      </GridItem>
      );
    }
    if(1 < attributeKeysIndexList.length && j < attributeKeysIndexList.length-1){
      rows.push(
        <GridItem columnSpan={2} key={`${j}_divider`}>
          <Divider></Divider>
        </GridItem>
      );
    }
  }
  let gridColumns = hide_edit ? ['auto', 'fill'] : ['auto', 'fill', 'auto'];
  let gridRows = [];
  for(i=0;i<attributeKeysIndexList.length+(attributeKeysIndexList.length-1);i++){
    gridRows.push('auto');
  }
  return (
    <Grid
      border="base"
      cornerRadius='base'
      padding='none'
      columns={gridColumns}
      rows={gridRows}
    >
      {rows}
    </Grid>
  );
}

shopify.extension.toml

[extensions.settings]
[[extensions.settings.fields]]
key = "attributes_lines"
type = "multi_line_text_field"
name = "表示するattribute.key"
description = ""
[[extensions.settings.fields]]
key = "hide_attributes"
type = "multi_line_text_field"
name = "非表示条件のcart.attributesのキー:値"
description = ""
[[extensions.settings.fields]]
key = "hide_empty"
type = "boolean"
name = "値が空欄の項目を表示しない"
[[extensions.settings.fields]]
key = "hide_edit"
type = "boolean"
name = "変更リンクを表示しない"

index.tsx

import React from 'react';
import ReactDOM from 'react-dom/client';
import FetchData from './FetchData';

const importantTarget = ReactDOM.createRoot(
  document.querySelector(".notice .notice-inner") as HTMLElement
);
importantTarget.render(<FetchData wrapper=".notice" url="/notice/?mode=important" />);

　
FetchData.tsx

import { useEffect,useState } from "react";
import parse from "html-react-parser";

type params = {
    wrapper  : string;
    url      : string;
};
function FetchData(props:params){
    const {wrapper,url} = props;
    const [html, setHtml] = useState<string>("");
    const wrapperElm:HTMLElement | null = document.querySelector(wrapper);

    useEffect(() => {
        fetch(url)
        .then((response)=>{
            if (!response.ok) {
                throw new Error();
            }
            return response.text();
        })
        .then((text) => {
            if(text.replace(/\s/g,'')){
                setHtml(text);
                if(wrapperElm){
                    wrapperElm.classList.remove("hide");
                }
            }
        })
        .catch((error) => {

        });
    }, []);

    return <>{html == "" ? "" : parse(html)}</>;
};
FetchData.defaultProps = {
    wrapper  : '',
    url      : '',
};
export default FetchData;

const Router = require('koa-router');
const router = new Router();
router.get('/', async (ctx, next) => {
    if(エラー条件){
        ctx.status = 400;//500
        return;
    }
    await ctx.render('index', {});
});

import { useState } from "react"
export const App = () => {
    const [num, setNum] = useState(0);
    const onClickButton = () => {
        setNum(num + 1);
    };
    return (
        <>
        <button onClick={onClickButton}>Button</button>
        <p>{num}</p>
        </>
    );
};

blueMessage.jsx

export const blueMessage = (props) => {
    console.log(props);
    const contentStyle = {
        color : props.color,
        fontSize : "20px"
    };
    return <p style={contentStyle}>{props.message}</p>
};

　
App.jsx

import { blueMessage } from "./components/blueMessage";
export const App = () => {
    const onClickButton = () => {
        alert();
    };
    const contentStyle = {
        color : "blue",
        fontSize : "20px"
    };
    return (
        <>
        <h2 style={{ color:"red" }}>Hello</h2>
        <p style={contentStyle}>World</p>
        <blueMessage color="green" message="Great" />
        <blueMessage color="red" message="Bad" />
        <button onClick={onClickButton}>button</button>
        </>
    );
}

　
childrenを使う場合
blueMessage.jsx

export const blueMessage = (props) => {
    console.log(props);
    const contentStyle = {
        color : props.color,
        fontSize : "20px"
    };
    return <p style={contentStyle}>{props.children}</p>
};

　
App.jsx

import { blueMessage } from "./components/blueMessage";
export const App = () => {
    const onClickButton = () => {
        alert();
    };
    const contentStyle = {
        color : "blue",
        fontSize : "20px"
    };
    return (
        <>
        <h2 style={{ color:"red" }}>Hello</h2>
        <p style={contentStyle}>World</p>
        <blueMessage color="green">Great</blueMessage>
        <blueMessage color="red">Bad</blueMessage>
        <button onClick={onClickButton}>button</button>
        </>
    );
}

App.jsx

export const App = () => {
    const onClickButton = () => {
        alert();
    };
    const contentStyle = {
        color : "blue",
        fontSize : "20px"
    };
    return (
        <>
        <h2 style={{ color:"red" }}>Hello</h2>
        <p style={contentStyle}>World</p>
        <button onClick={onClickButton}>button</button>
        </>
    );
}

App.jsx

export const App = () => {
    return (
        <>
            <h2>Hello</h2>
            <p>World</p>
        </>
    );
}

　
index.js

import ReactDOM from "react-dom";
import { App } from "./App";
ReactDOM.render(<App />,document.getElementById("root"));

import ReactDOM from "react-dom";
import { Fragment } from "react";
const App = () => {
    return (
        <Fragment>
            <h2>Hello</h2>
            <p>World</p>
        </Fragment>
    );
}
ReactDOM.render(<App />,document.getElementById("root"));

　
省略できる

import ReactDOM from "react-dom";
const App = () => {
    return (
        <>
            <h2>Hello</h2>
            <p>World</p>
        </>
    );
}
ReactDOM.render(<App />,document.getElementById("root"));