vue3使用codemirror搜索功能

要在Vue 3中使用CodeMirror搜索功能，需要执行以下步骤：

1. 安装CodeMirror和CodeMirror搜索库

npm install codemirror @codemirror/search

2. 在Vue组件中导入CodeMirror和CodeMirror搜索库

import { EditorState, EditorView, basicSetup } from "@codemirror/basic-setup";
import { defaultHighlightStyle } from "@codemirror/highlight";
import { searchCursor } from "@codemirror/search";
import { EditorState, EditorView, basicSetup } from "@codemirror/basic-setup";
import { defaultHighlightStyle } from "@codemirror/highlight";
import { searchCursor } from "@codemirror/search";

3. 在Vue组件的模板中添加CodeMirror编辑器

<template>
  <div>
    <div ref="editor"></div>
    <button @click="search">搜索</button>
  </div>
</template>

4. 在Vue组件的脚本中初始化CodeMirror编辑器

import { EditorState, EditorView, basicSetup } from "@codemirror/basic-setup";
import { defaultHighlightStyle } from "@codemirror/highlight";
import { searchCursor } from "@codemirror/search";

export default {
  mounted() {
    const editor = this.$refs.editor;

    const state = EditorState.create({
      doc: "Hello, world!",
      extensions: [
        basicSetup,
        defaultHighlightStyle,
        searchCursor(),
        EditorView.updateListener.of((v) => {
          console.log(v.state.doc.toString());
        }),
      ],
    });

    new EditorView({
      state,
      parent: editor,
    });
  },
  methods: {
    search() {
      const state = this.$refs.editor.view.state;
      const cursor = searchCursor(state, /o/g);

      if (cursor.findNext()) {
        console.log(cursor.from(), cursor.to());
      } else {
        console.log("没有找到匹配项");
      }
    },
  },
};

在上面的例子中，我们在Vue组件的mounted钩子函数中初始化了CodeMirror编辑器，并为其添加了搜索扩展。我们还添加了一个按钮，以便用户可以手动启动搜索。在search方法中，我们获取了CodeMirror编辑器的状态和搜索光标，并使用正则表达式/ o / g执行了搜索。如果找到了匹配项，则输出其位置，否则输出“没有找到匹配项”。