javascript - 单击删除按钮时从本地存储中删除特定表行

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/

在这里您可以找到文件：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从本地删除该行当我点击垃圾桶时存储。

第二个问题是，当我做了 2 个笑话然后刷新页面时。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：问题 1问题 2

这是我的代码（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");
  }
});

标签： javascripthtmlcsslocal-storage

javascript - 单击删除按钮时从本地存储中删除特定表行

问题描述

解决方案

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