---
title: devtools.inspectedWindow.tabId
slug: Mozilla/Add-ons/WebExtensions/API/devtools/inspectedWindow/tabId
translation_of: Mozilla/Add-ons/WebExtensions/API/devtools.inspectedWindow/tabId
original_slug: Mozilla/Add-ons/WebExtensions/API/devtools.inspectedWindow/tabId
---
<div>{{AddonSidebar()}}</div>

<p>devtools のこのインスタンスがアタッチされる {{WebExtAPIRef("tabs.Tab", "tab")}} の ID。番号で表されます。</p>

<p>これは拡張機能のバックグラウンドページに送信できるため、バックグラウンドページは {{WebExtAPIRef("tabs")}} API を使用してタブと対話できます:</p>

<pre class="brush: js">// devtools-panel.js

const scriptToAttach = "document.body.innerHTML = 'Hi from the devtools';";

attachContentScriptButton.addEventListener("click", () =&gt; {
  browser.runtime.sendMessage({
    tabId: browser.devtools.inspectedWindow.tabId,
    script: scriptToAttach
  });
});</pre>

<pre class="brush: js">// background.js

function handleMessage(request, sender, sendResponse) {
  browser.tabs.executeScript(request.tabId, {
    code: request.script
  });
}

browser.runtime.onMessage.addListener(handleMessage);</pre>

<h2 id="ブラウザの対応状況">ブラウザの対応状況</h2>

<p>{{Compat("webextensions.api.devtools.inspectedWindow.tabId")}}</p>

<p>{{WebExtExamples}}</p>

<div class="note"><strong>謝辞</strong>

<p>この API は Chromium の <a href="https://developer.chrome.com/extensions/devtools"><code>chrome.devtools</code></a> API に基づいています。</p>

<p>Microsoft Edge の互換性データは Microsoft Corporation によって提供され、Creative Commons Attribution 3.0 United States License に含まれています。</p>
</div>

<div class="hidden">
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