{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# `ui.mermaid`\n",
    "\n",
    "Mermaid 图表\n",
    "\n",
    "渲染使用受 Markdown 启发的 [Mermaid 语言](https://mermaid.js.org/)编写的图表和图形。通过向 `ui.markdown` 元素提供扩展字符串 `'mermaid'`，也可以在 Markdown 元素中使用 mermaid 语法。\n",
    "\n",
    "`content`：要显示的 Mermaid 内容"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<nicegui.elements.mermaid.Mermaid at 0x22a6fe97c90>"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from nicegui import ui\n",
    "\n",
    "ui.mermaid('''\n",
    "graph LR;\n",
    "    A --> B;\n",
    "    A --> C;\n",
    "''')\n",
    "\n",
    "# ui.run()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 处理错误\n",
    "\n",
    "您可以通过监听 `error` 事件来处理错误。事件参数包含属性 `hash`、`message`、`str` 以及一个带有额外信息的错误对象。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<nicegui.elements.mermaid.Mermaid at 0x22a031bd590>"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from nicegui import ui\n",
    "\n",
    "ui.mermaid('''\n",
    "graph LR;\n",
    "    A --> B;\n",
    "    A -> C;\n",
    "''').on('error', lambda e: print(e.args['message']))\n",
    "\n",
    "# ui.run()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "py311",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.11.7"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}