每当我向数组添加待办事项时,它都不会在 html 中刷新,我需要什么来解决这个问题?另外,如何将循环创建的删除按钮连接到函数?
const form = document.querySelector('form')
const input = document.querySelector('input')
const btnAdd = document.querySelector('button')
let ul = document.querySelector('ul')
let todos = ["one", "two", "three"];
pushTodos = (e) => {
e.preventDefault();
todos.push(input.value);
input.value = '';
console.log(todos);
}
for(let i of todos) {
createList = document.createElement("li");
createList.innerHTML+=i + '<button>Delete</delete>';
console.log(todos);
ul.appendChild(createList);
}
form.addEventListener('submit', pushTodos)
你遇到的问题是你只在文档加载时更新 DOM 一次。更新列表后您无需执行任何操作。要解决此问题,请创建一个同步函数来将内存与 DOM 同步,并在每次更新列表时调用它:
let todos = ["one", "two", "three"];
const syncTodosWithDOM = () => {
ul.innerHTML = "";
for (let i of todos) {
createList = document.createElement("li");
createList.innerHTML+=i + '<button>Delete</delete>';
console.log(todos);
ul.appendChild(createList);
}
};
pushTodos = (e) => {
e.preventDefault();
todos.push(input.value);
input.value = '';
console.log(todos);
syncTodosWithDOM();
}
syncTodosWithDOM();
form.addEventListener('submit', pushTodos)
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