next
Version:
The React Framework
62 lines (61 loc) • 2.55 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = SideEffect;
var _interop_require_wildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default;
var _react = _interop_require_wildcard(require("react"));
function SideEffect(props) {
const { headManager , reduceComponentsToState } = props;
function emitChange() {
if (headManager && headManager.mountedInstances) {
const headElements = _react.Children.toArray(Array.from(headManager.mountedInstances).filter(Boolean));
headManager.updateHead(reduceComponentsToState(headElements, props));
}
}
if (isServer) {
var ref;
headManager == null ? void 0 : (ref = headManager.mountedInstances) == null ? void 0 : ref.add(props.children);
emitChange();
}
useClientOnlyLayoutEffect(()=>{
var ref1;
headManager == null ? void 0 : (ref1 = headManager.mountedInstances) == null ? void 0 : ref1.add(props.children);
return ()=>{
var ref;
headManager == null ? void 0 : (ref = headManager.mountedInstances) == null ? void 0 : ref.delete(props.children);
};
});
// We need to call `updateHead` method whenever the `SideEffect` is trigger in all
// life-cycles: mount, update, unmount. However, if there are multiple `SideEffect`s
// being rendered, we only trigger the method from the last one.
// This is ensured by keeping the last unflushed `updateHead` in the `_pendingUpdate`
// singleton in the layout effect pass, and actually trigger it in the effect pass.
useClientOnlyLayoutEffect(()=>{
if (headManager) {
headManager._pendingUpdate = emitChange;
}
return ()=>{
if (headManager) {
headManager._pendingUpdate = emitChange;
}
};
});
useClientOnlyEffect(()=>{
if (headManager && headManager._pendingUpdate) {
headManager._pendingUpdate();
headManager._pendingUpdate = null;
}
return ()=>{
if (headManager && headManager._pendingUpdate) {
headManager._pendingUpdate();
headManager._pendingUpdate = null;
}
};
});
return null;
}
const isServer = typeof window === 'undefined';
const useClientOnlyLayoutEffect = isServer ? ()=>{} : _react.useLayoutEffect;
const useClientOnlyEffect = isServer ? ()=>{} : _react.useEffect;
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