Code edit and preview icon as toggle

[saran13raj]

How can I show edit and preview by using a single icon as toggle without using 2 different icons in toolbar?
I don't need these 3 icons:

Instead, show the edit and preview as a toggle:

[jaywcjlove]

https://codesandbox.io/embed/react-md-editor-custom-toolbars-https-github-com-uiwjs-react-md-editor-issues-433-9mwuob?fontsize=14&hidenavigation=1&theme=dark

@saran13raj

import React, { useContext } from "react";
import MDEditor, {
  commands,
  ICommand,
  EditorContext
} from "@uiw/react-md-editor";

const Button = () => {
  const { preview, dispatch } = useContext(EditorContext);
  const click = () => {
    dispatch!({
      preview: preview === "edit" ? "preview" : "edit"
    });
  };
  if (preview === "edit") {
    return (
      <svg width="12" height="12" viewBox="0 0 520 520" onClick={click}>
        <polygon
          fill="currentColor"
          points="0 71.293 0 122 319 122 319 397 0 397 0 449.707 372 449.413 372 71.293"
        />
        <polygon
          fill="currentColor"
          points="429 71.293 520 71.293 520 122 481 123 481 396 520 396 520 449.707 429 449.413"
        />
      </svg>
    );
  }
  return (
    <svg width="12" height="12" viewBox="0 0 520 520" onClick={click}>
      <polygon
        fill="currentColor"
        points="0 71.293 0 122 38.023 123 38.023 398 0 397 0 449.707 91.023 450.413 91.023 72.293"
      />
      <polygon
        fill="currentColor"
        points="148.023 72.293 520 71.293 520 122 200.023 124 200.023 397 520 396 520 449.707 148.023 450.413"
      />
    </svg>
  );
};

const codePreview: ICommand = {
  name: "preview",
  keyCommand: "preview",
  value: "preview",
  icon: <Button />
};

export default function App() {
  const [value, setValue] = React.useState("**Hello world!!!**");
  return (
    <div className="container">
      <div>The system automatically sets the theme</div>
      <MDEditor
        value={value}
        preview="edit"
        extraCommands={[codePreview, commands.fullscreen]}
        onChange={(val) => {
          setValue(val!);
        }}
      />
    </div>
  );
}

[saran13raj]

Thanks a lot. @jaywcjlove

[pranavmalvawala]

This is great! but how can you do this in next.js?

When you import the context like this

import { EditorContext } from "@uiw/react-md-editor/lib/Context";

It loses the actual value

https://codesandbox.io/s/react-md-editor-296-forked-33p4i2?file=/fullscreencmd.js