Add tab.elem.find_id

qutebrowser/browser/browsertab.py

@@ -433,6 +433,15 @@ class AbstractElements:
         """
         raise NotImplementedError
 
+    def find_id(self, elem_id, callback):
+        """Find the HTML element with the given ID async.
+
+        Args:
+            callback: The callback to be called when the search finished.
+            elem_id: The ID to search for.
+        """
+        raise NotImplementedError
+
     def find_focused(self, callback):
         """Find the focused element on the page async.
 

qutebrowser/browser/webengine/webenginetab.py

@@ -351,6 +351,11 @@ class WebEngineElements(browsertab.AbstractElements):
         js_cb = functools.partial(self._js_cb_multiple, callback)
         self._tab.run_js_async(js_code, js_cb)
 
+    def find_id(self, elem_id, callback):
+        js_code = javascript.assemble('document', 'getElementById', elem_id)
+        js_cb = functools.partial(self._js_cb_single, callback)
+        self._tab.run_js_async(js_code, js_cb)
+
     def find_focused(self, callback):
         js_code = javascript.assemble('webelem', 'focus_element')
         js_cb = functools.partial(self._js_cb_single, callback)

qutebrowser/browser/webkit/webkittab.py

@@ -512,6 +512,9 @@ class WebKitElements(browsertab.AbstractElements):
 
         callback(elems)
 
+    def find_id(self, elem_id, callback):
+        self.find_css('#' + elem_id, callback)
+
     def find_focused(self, callback):
         frame = self._widget.page().currentFrame()
         if frame is None: