Squashed 'thirdparty/preact/' content from commit b2d90cc

git-subtree-dir: thirdparty/preact
git-subtree-split: b2d90cc116f1d1998f7a7c98dc6986bf4c1841f4

1 files changed, 25 insertions, 0 deletions

diff --git a/src/vdom/functional-component.js b/src/vdom/functional-component.js
new file mode 100644
index 000000000..04bc5a464
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+++ b/src/vdom/functional-component.js
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+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);
+}