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Diffstat (limited to 'thirdparty/preact/src/vdom/functional-component.js')
-rw-r--r-- | thirdparty/preact/src/vdom/functional-component.js | 25 |
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); +} |