html - react : Action on variable change

Question

有没有办法调用变量变化(状态)的方法。如何获取更改了哪些组件的列表？

 componentDidUpdate(prevProps, prevState) {

    const {ID} = this.state
        if (this.ID !== this.previousID || this.cmbID !== this.previoudcmbID) {
            if(this.ID !== undefined && this.cmbID !== undefined)
            {
                this.reload3();

            //  console.log(this.prevProps)
                console.log(this.state.settings[0])
                console.log(this.prevState.settings[0])

            }



    }
    this.prevState = this.state;
}

Answer 1

终于解决了

componentDidUpdate(PrevProps, prevState){
if(this.state.cmbID !== prevState.cmbID){

    this.reload2()
}   
if(this.state.ID !== prevState.ID){

    this.reload3()
}
}