语法

值传递与引用字面量传递

值传递

//father
myComponent(this.params)
//son
@Builder 
function myComponent(params){
	params
}

引用字面量传递

引用字面量必须带"{}"，且值传递无法让父组件的值刷新

myComponent({attr1:a1,attr2:a2})
//son
@Builder 
function myComponent(params){
	params.attr1
}
export interface Params{
	attr1:Attr1
	attr2:Attr2
}

取反

doLike:(item:ReplyItemModel)=>void =(item: ReplyItemModel)=>{
}

传入匿名函数

this.click=!this.clic

类型断言

xx as Type
data:GoodsModule=new GoodsModule({} as GoodsInfo)

对Object数组排序

if(sortMethod===true){
	this.commentsInfoArr.sort((x:CommentsInfo,y:CommentsInfo)=> {
		if (x.date >y.date) {
			return -1;
		}
		if (x.date <y.date) {
			return 1;
		}
		return 0}
	)
}

对Object数组去重

let newCart:Foods[] = []
 this.shoppingCartArr.forEach((item:Foods)=>{
   return newCart.includes(item)?'':newCart.push(item)
 })
 this.shoppingCartArr = newCart

日期格式化

@State now: Date = new Date()
@State formattedDate: string = this.now.toLocaleDateString("en-US");

随机数

rnd = Math.random()*RANGE

时间相关

setTimeout

t时间后才执行

setTimeout(()=>{
	},t)

setInterval

每隔t时间执行一次

taskId:number = -1
this.taskId = setTnterval(()=>{
	++this.cnt
	clearInterval(this.taskId)
},t)