components/ancestor.js (ancestor-component):

Component({     relations: {         "./descendant": {             type: "descendant",             linked() {                 console.log("linked");             }         }     } });

components/component.wxml (some-component):

<ancestor-component>     <slot /> </ancestor-component>

components/descendant.js (descendant-component):

Component({     relations: {         "./ancestor": {             type: "ancestor"         }     } });

index.wxml:

<some-component>     <descendant-component /> </some-component>