Markdown Double Click Preview

Double-click to switch between a Markdown file and its preview. The line you clicked appears at the top of the other view.

Features

One rule: the line you click is shown at the top of the view you switch to.

Source → Preview: double-click any text in the Markdown editor. The preview opens with that line at the top.
Preview → Source: double-click in the preview. The editor opens with that line at the top.
Position is kept: when you come back to a preview tab, it shows where you were.
Stable with diagrams: for up to 10 seconds after opening, the preview returns to the same line even if Mermaid diagrams or images change the page height. It stops as soon as you scroll.

Nothing is sent outside your computer.

Open a Markdown (.md) file.

Goal	Action
Open the preview	Double-click text in the editor
Go back to the source	Double-click in the preview
Toggle with the keyboard	`Ctrl+Shift+V` (the cursor line goes to the top)
Select text in the editor	Drag with the mouse

Double-click no longer selects a word in Markdown editors. It switches to the preview instead. Drag to select text.
Double-click does nothing on an empty line.
After installing or updating, run Developer: Reload Window if it does not work.

Setting	Default	Meaning
`markdownDoubleClickPreview.doubleClickToPreview`	`true`	Double-click in the editor switches to the preview
`markdownDoubleClickPreview.cursorLineAtTopInEditor`	`true`	When returning from the preview, show the cursor line at the top of the editor
`markdownDoubleClickPreview.reloadOnRequest`	`true`	Reload the window when the file `~/.markdown-double-click-preview/reload-request` is newly written (a hook for scripts that update the extension)

This extension also turns on the built-in setting markdown.preview.doubleClickToSwitchToEditor.

MIT

マークダウンの元の字とプレビューを、ダブルクリックで切り替えます。クリックした行が、切り替えた先の画面のいちばん上に出ます。

決まりは 1つ: クリックした所が、切り替えた先の画面のいちばん上に出る。

外へは何も送りません。

やりたい事	操作
プレビューを開く	元の字の画面で字をダブルクリック
元の字に戻る	プレビューでダブルクリック
キーで切り替える	`Ctrl+Shift+V`（カーソルの行がいちばん上に出る）
字を選ぶ	マウスでなぞる

設定	既定	意味
`markdownDoubleClickPreview.doubleClickToPreview`	入	元の字の画面のダブルクリックでプレビューに切り替える
`markdownDoubleClickPreview.cursorLineAtTopInEditor`	入	プレビューから戻った時に、カーソルの行をいちばん上に出す
`markdownDoubleClickPreview.reloadOnRequest`	入	`~/.markdown-double-click-preview/reload-request` が新しく書かれたら窓を読み直す（入れ替え用の口）

あわせて、標準の設定 markdown.preview.doubleClickToSwitchToEditor を入にします。