3 examples of 'ionic lifecycle events' in JavaScript

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lifecycle(modalEvent) {
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    const el = this.usersElement;
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    const name = LIFECYCLE_MAP[modalEvent.type];
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    if (el && name) {
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        const ev = new CustomEvent(name, {
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            bubbles: false,
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            cancelable: false,
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            detail: modalEvent.detail
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        });
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        el.dispatchEvent(ev);
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    }
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}

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function handleLifeCycle(event, component) {
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  // todo: early exit logic, if we've crawled a parent alreadycd
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  // then lets not crawl it again.
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  let walk = (event, component) => {
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    let handler =
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      component[event.type] ||
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      (component.props && component.props[event.type]);
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    if (handler) {
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      // if the component is currently already awaiting notification queue
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      // then notify
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      let lifeCycleID = component.uuid + event.type;
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      lifeCycleQueue.unshift(lifeCycleID);
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      // only register if the lifecycleid isn't found, or the component in the notifier has changed
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      if (
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        !lifeCycleNotifiers[lifeCycleID] ||
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        lifeCycleNotifiers[lifeCycleID].component !== component
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      ) {
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        lifeCycleNotifiers[lifeCycleID] = {
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          component: component,
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          event: event,
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        };
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      }
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    }
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  };
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  walk(event, component);
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  fireLifeCycle(lifeCycleNotifiers);
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}

27
ngOnChanges(changes: {[propertyName: string]: SimpleChange}){console.log('ngOnChanges',changes)}