let array:number[]=[0,1,2,3,4,5,6];//Remove from the endlet removedElement=array.pop();//[0, 1, 2, 3, 4, 5]console.log(removedElement);//6console.log(array);//[0, 1, 2, 3, 4, 5] 3. Remove Item from Start usingarray.shift() Thearray.shift()methodremoves an item ...
constoItem:HTMLElement=createItem("div","todo-item",this.todoView(todo)) // const oItem:HTMLElement=document.createElement('div'); // oItem.className='todo-item' // oItem.innerHTML=this.todoView(todo) this.todoWarpper.appendChild(oItem) } protectedremoveItem(target:HTMLElement){ constoPa...
constlist:Array<number>=[1,2,3]constlist:number[]=[1,2,3] 元组。表示一个已知元素数量和类型的数组,各元素的类型不必相同。元组中包含的元素,必须与声明的类型一致,而且不能多、不能少,甚至顺序不能不符。堪称严格版的数组。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 constx:[string,number...
item.removeChild(item.firstChild as ChildNode); } }) 这是我最近写的一段代码(略微删改),在第一页有个add-ele元素的时候就删除它。这里我们将item.firstChild断言成了HTMLDivElement类型,如果不断言,item.firstChild的类型就是ChildNode,而ChildNode类型中是不存在classList属性的,所以就就会报错,当我们把他断...
比如我们需要编写一个经典的 Todo list。如果我们使用原生 DOM,是这样的: new item 1 X new item 2 X const todoList = document.querySelector('.todo-list'); const addButton = document.querySelector('button'); addButton.addEventListener('click', () => { const todoItem = document.createElement...
<template> <div> <ul> <li v-for="(item,index) in list" :key="item.id" style="cursor:pointer" @click='remove(index)'> {{item.name}}---{{item.age}} </li> </ul> </div> </template> <script> import { reactive } from 'vue' export default { name: 'App', setup() { int...
Useshift()to Remove an Array Item in TypeScript Theshift()method can delete an element from an array in TypeScript, but its capacity is limited. Usingshift()is only possible to remove the first element of a particular array and return it. ...
然后在components文件夹下新建TodoList.vue,这个组件用来实现处理每个待办事项的操作逻辑 <template> <div class="todo-item"> <el-checkbox v-model="todo!.done" /> <el-alert class="alert" :title="todo!.title" :type="todo!.done ? 'success' : 'warning'" :closable="false" /> ...
interfaceTodoItem{id:number;text:string;completed:boolean;}classTodoList{privateitems:TodoItem[]=[];addItem(text:string){constnewItem:TodoItem={id:this.items.length+1,text:text,completed:false};this.items.push(newItem);}removeItem(id:number){this.items=this.items.filter(item=>item.id!==id...
/** * @description: 将item转换为字符串 */ export function defaultToString(item: any): string { // 对于 null undefined和字符串的处理 if (item === null) { return 'NULL'; } else if (item === undefined) { return 'UNDEFINED'; } else if (typeof item === 'string' || item instanc...