chrome/common/extensions/docs/templates/articles/manifest/externally_connectable.html

   1 <h1>externally_connectable</h1>
   2
   3 <p>
   4 The <code>externally_connectable</code> manifest property declares which extensions, apps, and web pages can connect to your {{platform}} via <a href="../runtime#method-connect">runtime.connect</a> and <a href="../runtime#method-sendMessage">runtime.sendMessage</a>.
   5 </p>
   6
   7 <p>
   8 For a tutorial on message passing see <a href="../messaging#external">cross-extension and app messaging</a> and <a href="../messaging#external-webpage">sending messages from web pages</a>.
   9 </p>
  10
  11 <h2 id="without-externally-connectable">Connecting without externally_connectable</h2>
  12
  13 <p>
  14 If <code>externally_connectable</code> is not declared in your {{platform}}'s manifest, all extensions and apps can connect, but no webpages can connect. As a consequence, when updating your manifest to use <code>externally_connectable</code>, if <code>"ids": ["*"]</code> is not specified then other extensions and apps will lose the ability to connect to your {{platform}}. This may be an unintended consequence, so keep it in mind.
  15 </p>
  16
  17 <h2 id="manifest">Sample manifest.json</h2>
  18 <pre data-filename="manifest.json">
  19 {
  20   "name": "My externally connectable {{platform}}",
  21   "externally_connectable": {
  22     // Extension and app IDs. If this field is not specified, no
  23     // extensions or apps can connect.
  24     "ids": [
  25       "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
  26       "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
  27       ...
  28       // Alternatively, to match all extensions and apps, specify only
  29       // "*".
  30       "*"
  31     ],
  32     // Match patterns for web pages. Does not affect content scripts.
  33     // If this field is not specified, no webpages can connect.
  34     "matches": [
  35       "https://*.google.com/*",
  36       "*://*.chromium.org/*",
  37       ...
  38     ],
  39     // Indicates that the extension would like to make use of the TLS
  40     // channel ID of the web page connecting to it. The web page must
  41     // also opt to send the TLS channel ID to the extension via setting
  42     // <code>includeTlsChannelId</code> to <code>true</code> in $(ref:runtime.connect)'s connectInfo
  43     // or $(ref:runtime.sendMessage)'s options.
  44     "accepts_tls_channel_id": false
  45   },
  46   ...
  47 }
  48 </pre>
  49
  50 <h2 id="reference">Reference</h2>
  51 <p class="api_reference">
  52 The externally_connectable manifest key can have the following properties:
  53 {{+partials.manifest_type type:data/}}
  54 </p>