【发布时间】：2020-04-20 19:21:15
【问题描述】：
我对编程很陌生（只有几个星期），并且正在尝试做一个小型练习项目，您可以在其中创建笑话，然后将它们与您的姓名和年龄一起存储在本地存储中。右侧还有一个垃圾桶，您可以在其中删除笑话。
您可以在此处查看该网站：https://nostalgic-poitras-17b692.netlify.app/
您可以在此处找到文件：https://github.com/Dannus90/JavaScript_Practise_Own_Project_Unfinished
到目前为止，您可以输入所有内容，它会检测您是否已输入。然后笑话被存储在本地存储中并显示在表格的屏幕上。
目前有两个问题： - 如果我点击任何垃圾桶，它会从本地存储中删除所有行，我知道它为什么在代码中这样做，但我不知道如何定位特定行，并且只有在我点击垃圾桶时才从本地存储中删除该行。
- 第二个问题是当我开了like 2个笑话然后刷新了页面。他们还在那里，所以一切正常。但是，如果我在刷新后输入新的笑话，它们会覆盖旧的本地存储而不是添加到它，所以如果我再次刷新，只会显示最近的笑话。
问题应该在以下图片中找到： Problem1 Problem2
这是我目前的代码（在来自 GitHub 的文档中，您还可以看到随机 ID 生成器。把它拿走以减少混乱:-)）：
// Variables
const jokeInput = document.getElementById("text-1");
const nameInput = document.getElementById("text-2");
const ageInput = document.getElementById("number");
const submitBtn = document.querySelector(".btn");
const output = document.querySelector(".output-container");
// Eventlisteners
submitBtn.addEventListener("click", validateFields);
// Error
function showError(input) {
const formControl = input;
formControl.style.border = "3px solid red";
removeStyle(formControl);
}
// Show Error message
function showErrorMessage(input, message) {
input.classList.add("error");
input.innerText = message;
setTimeout(() => {
input.classList.remove("error");
}, 3000);
}
// Show success
function showSuccess() {
jokeInput.style.border = "3px solid green";
nameInput.style.border = "3px solid green";
ageInput.style.border = "3px solid green";
const small = document.querySelector(".small-3");
small.classList.add("success");
small.innerText = "You have successfully entered all fields";
setTimeout(() => {
small.classList.remove("success");
}, 3000);
removeStyle(jokeInput, nameInput, ageInput);
}
// Remove Style
function removeStyle(input, input2, input3) {
setTimeout(() => {
input.style.removeProperty("border");
input2.style.removeProperty("border");
input3.style.removeProperty("border");
}, 3000);
}
// Main Function
function validateFields(e) {
e.preventDefault();
if (jokeInput.value === "") {
showError(jokeInput);
const small = document.querySelector(".small-1");
showErrorMessage(small, "Please provide a joke");
}
if (nameInput.value === "") {
showError(nameInput);
const small = document.querySelector(".small-2");
showErrorMessage(
small,
"Please fill in your name with alpabetical characters only"
);
}
if (ageInput.value === "") {
showError(ageInput);
const small = document.querySelector(".small-3");
showErrorMessage(small, "Please enter your age");
}
if (
jokeInput.value !== "" &&
nameInput.value !== "" &&
ageInput.value !== ""
) {
showSuccess();
updateDOM(jokeInput.value, nameInput.value, ageInput.value);
}
}
// Save DOM Data
let savedLocalStorage1 = [];
let savedLocalStorage2 = [];
let savedLocalStorage3 = [];
let savedLocalStorage4 = [];
// Update local storage
function updateLocalStorage() {
localStorage.setItem(
"savedLocalStorage1",
JSON.stringify(savedLocalStorage1)
);
localStorage.setItem(
"savedLocalStorage2",
JSON.stringify(savedLocalStorage2)
);
localStorage.setItem(
"savedLocalStorage3",
JSON.stringify(savedLocalStorage3)
);
localStorage.setItem(
"savedLocalStorage4",
JSON.stringify(savedLocalStorage4)
);
}
// Update DOM
function updateDOM(input1, input2, input3) {
const outputContainer = document.querySelector(".output-container");
const row = outputContainer.insertRow(1);
const cell1 = row.insertCell(0);
const cell2 = row.insertCell(1);
const cell3 = row.insertCell(2);
const cell4 = row.insertCell(3);
cell1.innerHTML = `${input1}`;
cell2.innerHTML = `${input2}`;
cell3.innerHTML = `${input3}`;
cell4.innerHTML = `<i class="fas fa-trash-alt id4"></i>`;
savedLocalStorage1.push({ id: uuidv4(), cell_1: `${input1}` });
savedLocalStorage2.push({ id: uuidv4(), cell_2: `${input2}` });
savedLocalStorage3.push({ id: uuidv4(), cell_3: `${input3}` });
savedLocalStorage4.push({
id: uuidv4(),
cell_4: `<i class="fas fa-trash-alt id4"></i>`,
});
updateLocalStorage();
const rows = document.querySelectorAll("tr");
if (rows.length > 2) {
resetBounce();
}
}
window.onload = (e) => {
function DOMOutput() {
const sto1 = JSON.parse(localStorage.getItem("savedLocalStorage1"));
const sto2 = JSON.parse(localStorage.getItem("savedLocalStorage2"));
const sto3 = JSON.parse(localStorage.getItem("savedLocalStorage3"));
const sto4 = JSON.parse(localStorage.getItem("savedLocalStorage4"));
const outputContainer = document.querySelector(".output-container");
for (let i = 0; i < sto1.length; i++) {
const row = outputContainer.insertRow(1);
const cell1 = row.insertCell(0);
cell1.innerHTML = sto1[i].cell_1;
const cell2 = row.insertCell(1);
cell2.innerHTML = sto2[i].cell_2;
const cell3 = row.insertCell(2);
cell3.innerHTML = sto3[i].cell_3;
const cell4 = row.insertCell(3);
cell4.innerHTML = sto4[i].cell_4;
}
}
DOMOutput();
};
// Delete from local Storage
// Reset bounce function
function resetBounce() {
setTimeout(() => {
const cell4 = document.querySelectorAll(".fas");
cell4.forEach((element) => element.classList.remove("fas", "fa-trash-alt"));
}, 50);
setTimeout(() => {
const cell4 = document.querySelectorAll(".id4");
console.log(cell4);
cell4.forEach((element) => element.classList.add("fas", "fa-trash-alt"));
}, 75);
}
// Delete Function
output.addEventListener("click", function clearRow(e) {
if (e.target.className.includes("fas")) {
e.target.parentElement.parentElement.remove();
// Needs to be fixed!
localStorage.removeItem("savedLocalStorage1");
localStorage.removeItem("savedLocalStorage2");
localStorage.removeItem("savedLocalStorage3");
localStorage.removeItem("savedLocalStorage4");
}
});
【问题讨论】：
标签： javascript html css local-storage