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todo.js
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todo.js
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todoMain();
function todoMain(){
const DEFAULT_OPTION = "Category";
let inputElem,
inputElem2,
button,
selectElem,
todoList = [];
getElements();
addListeners();
load();
renderRows();
updateSelectOptions();
function getElements(){
inputElem = document.getElementsByTagName("input")[0];
inputElem2 = document.getElementsByTagName("input")[1];
button = document.getElementById("addBtn");
selectElem = document.getElementById("categoryFilter");
}
function addListeners(){
button.addEventListener("click", addEntry, false);
selectElem.addEventListener("change", filterEntries, false);
}
function addEntry(event){
let inputValue = inputElem.value;
//ulElem.innerHTML += `<li>${inputValue}</li>`;
inputElem.value = "";
let inputValue2 = inputElem2.value;
inputElem2.value = "";
let obj = {
todo: inputValue,
category: inputValue2,
}
renderRow(obj);
todoList.push(obj);
save();
updateSelectOptions();
}
function filterEntries(){
let selection = selectElem.value;
if(selection ==DEFAULT_OPTION){
let rows = document.getElementsByTagName("tr");
Array.from(rows).forEach((row, index)=>{
row.style.display = "";
});
}else{
let rows = document.getElementsByTagName("tr");
Array.from(rows).forEach((row, index)=>{
if(index==0){
return;
}
let category = row.getElementsByTagName("td")[2].innerText;
if(category == selectElem.value ){
row.style.display = "";
}else{
row.style.display = "none";
}
});
}
}
function updateSelectOptions(){
let options = [];
let rows = document.getElementsByTagName("tr");
Array.from(rows).forEach((row, index)=>{
if(index==0){
return;
}
let category = row.getElementsByTagName("td")[2].innerText;
// if(!options.includes(category)){
options.push(category);
// }
});
let optionSet = new Set(options);
//empty the select options
selectElem.innerHTML = "";
let newOptionElem = document.createElement('option');
newOptionElem.value = DEFAULT_OPTION;
newOptionElem.innerText= DEFAULT_OPTION;
selectElem.appendChild(newOptionElem);
for(let option of optionSet){
let newOptionElem = document.createElement('option');
newOptionElem.value = option;
newOptionElem.innerText= option;
selectElem.appendChild(newOptionElem);
}
}
function save(){
let stringified = JSON.stringify(todoList);
localStorage.setItem("todoList", stringified);
}
function load(){
let retrieved = localStorage.getItem("todoList");
todoList = JSON.parse(retrieved);
if(todoList ==null)
todoList = [];
}
function renderRows(){
todoList.forEach(todoObj => {
// let todoEntry = todoObj["todo"];
// let key = "category";
// let todoCategory = todoObj[key];
renderRow(todoObj);
})
}
function renderRow({todo: inputValue, category: inputValue2}){
// let inputValue = obj.todo;
// let inputValue2 = obj.category;
// let {todo: inputValue, category: inputValue2} = obj;
//add a new row
let table = document.getElementById("todoTable");
let trElem = document.createElement("tr");
table.appendChild(trElem);
//checkbox cell
let checkboxElem = document.createElement("input");
checkboxElem.type= "checkbox";
checkboxElem.addEventListener("click", done, false);
let tdElem1 = document.createElement("td");
tdElem1.appendChild(checkboxElem);
trElem.appendChild(tdElem1);
//to-do list cell
let tdElem2 = document.createElement("td");
tdElem2.innerText = inputValue;
trElem.appendChild(tdElem2);
//category cell
let tdElem3 = document.createElement("td");
tdElem3.innerText = inputValue2;
trElem.appendChild(tdElem3);
//delete cell
let spanElem = document.createElement("span");
spanElem.innerText = "remove_circle_outline";
spanElem.className = "material-icons";
spanElem.addEventListener("click", deleteItem, false);
let tdElem4 = document.createElement("td");
tdElem4.appendChild(spanElem);
trElem.appendChild(tdElem4);
function deleteItem(){
trElem.remove();
updateSelectOptions();
}
function done(){
trElem.classList.toggle("strike");
}
}
}