Merge commit '30b577138dda685f65a8529be1866afa6e321845' as 'thirdparty/preact'

1 files changed, 25 insertions, 0 deletions

diff --git a/thirdparty/preact/src/vdom/functional-component.js b/thirdparty/preact/src/vdom/functional-component.js
new file mode 100644
index 000000000..04bc5a464
--- /dev/null
+++ b/thirdparty/preact/src/vdom/functional-component.js
@@ -0,0 +1,25 @@
+import { EMPTY } from '../constants';
+import { getNodeProps } from './index';
+import { isFunction } from '../util';
+
+
+/** Check if a VNode is a reference to a stateless functional component.
+ *	A function component is represented as a VNode whose `nodeName` property is a reference to a function.
+ *	If that function is not a Component (ie, has no `.render()` method on a prototype), it is considered a stateless functional component.
+ *	@param {VNode} vnode	A VNode
+ *	@private
+ */
+export function isFunctionalComponent(vnode) {
+	let nodeName = vnode && vnode.nodeName;
+	return nodeName && isFunction(nodeName) && !(nodeName.prototype && nodeName.prototype.render);
+}
+
+
+
+/** Construct a resultant VNode from a VNode referencing a stateless functional component.
+ *	@param {VNode} vnode	A VNode with a `nodeName` property that is a reference to a function.
+ *	@private
+ */
+export function buildFunctionalComponent(vnode, context) {
+	return vnode.nodeName(getNodeProps(vnode), context || EMPTY);
+}