首先，一些设置阶段的代码:varinstances=[];classParent{staticdoImportantStuff(){console.log('Parentdoingimportantstuff');returnfalse;}staticinit(){if(this.doImportantStuff())instances.push(newthis());}}classChild1extendsParent{staticdoImportantStuff(){console.log('Child1doingimportantstuff');if(someCondition)