There is a problem with the preview trigger scrolling

[wjjhhh]

https://codesandbox.io/embed/markdown-editor-mermaid-for-react-uvtsx?fontsize=14&hidenavigation=1&theme=dark

[kevynull]

https://codesandbox.io/embed/markdown-editor-mermaid-for-react-uvtsx?fontsize=14&hidenavigation=1&theme=dark

Me too, but verison 2.1.11 doesn't have this BUG

https://codesandbox.io/s/vigilant-sammet-i2vyn?from-embed

[jaywcjlove]

Scrolling issues caused by mermaid code preview example?

[jaywcjlove]

@wjjhhh @kevynull I updated the example. https://codesandbox.io/embed/recursing-water-08i59s?fontsize=14&hidenavigation=1&theme=dark

import React, { useState, useRef, useEffect } from "react";
import ReactDOM from "react-dom";
import MDEditor from "@uiw/react-md-editor";
import mermaid from "mermaid";

const mdMermaid = `The following are some examples of the diagrams, charts and graphs that can be made using Mermaid and the Markdown-inspired text specific to it. 

\`\`\`mermaid
graph TD
A[Hard] -->|Text| B(Round)
B --> C{Decision}
C -->|One| D[Result 1]
C -->|Two| E[Result 2]
\`\`\`

\`\`\`mermaid
sequenceDiagram
Alice->>John: Hello John, how are you?
loop Healthcheck
    John->>John: Fight against hypochondria
end
Note right of John: Rational thoughts!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
\`\`\`
`;

const randomid = () => parseInt(String(Math.random() * 1e15), 10).toString(36);

const Code = ({ inline, children = [], className, ...props }: any) => {
  const demoid = useRef(`dome${randomid()}`);
  const code = getCode(children);
  const demo = useRef(null);
  useEffect(() => {
    if (demo.current) {
      try {
        const str = mermaid.render(
          demoid.current,
          code,
          () => null,
          demo.current
        );
        // @ts-ignore
        demo.current.innerHTML = str;
      } catch (error) {
        // @ts-ignore
        demo.current.innerHTML = error;
      }
    }
  }, [code, demo]);

  if (
    typeof code === "string" &&
    typeof className === "string" &&
    /^language-mermaid/.test(className.toLocaleLowerCase())
  ) {
    return (
      <code ref={demo}>
        <code id={demoid.current} style={{ display: "none" }} />
      </code>
    );
  }
  return <code className={String(className)}>{children}</code>;
};

const getCode = (arr = []) =>
  arr
    .map((dt) => {
      if (typeof dt === "string") {
        return dt;
      }
      if (dt.props && dt.props.children) {
        return getCode(dt.props.children);
      }
      return false;
    })
    .filter(Boolean)
    .join("");

export default function App() {
  const [value, setValue] = useState(mdMermaid);
  return (
    <MDEditor
      onChange={(newValue = "") => setValue(newValue)}
      textareaProps={{
        placeholder: "Please enter Markdown text"
      }}
      height={500}
      value={value}
      previewOptions={{
        components: {
          code: Code
        }
      }}
    />
  );
}

ReactDOM.render(<App />, document.getElementById("container"));