index.js

let tableArr = [
    ["Fruits", "Mango", "Apple", "Banana"],
    ["Mango", "Fruits"],
    ["Apple", "Fruits"],
    ["Banana", "Fruits"],
    ["Oceans", "Arctic", "Atlantic", "Pacific", "Indian", "Southern"],
    ["Arctic", "Oceans"],
    ["Atlantic", "Oceans"],
    ["Pacific", "Oceans"],
    ["Indian", "Oceans"],
    ["Southern", "Oceans"]
]

var link

//Clearing screen/container code
function clearTable() {
    let divContainer = document.getElementById("container");
    divContainer.innerHTML = ""
    //Remove styling to container
    divContainer.classList.remove("dynCont");
}
//----------------------------------------------------------------

//Clear input text code
function clearText() {
    const input1 = document.getElementById("input1");
    const input2 = document.getElementById("input2");
    input1.value = ""
    input2.value = ""
}
//----------------------------------------------------------------

//Autocomplete code
function autocomplete(inp, arr) {
    /*the autocomplete function takes two arguments,
    the text field element and an array of possible autocompleted values:*/
    var currentFocus;
    /*execute a function when someone writes in the text field:*/
    inp.addEventListener("input", function (e) {
        var a, b, i, val = this.value;
        // console.log(a, b, i, val)
        // So that dude used this trick eh?>>>>>>>>>>>

        /*close any already open lists of autocompleted values*/
        closeAllLists();
        if (!val) { return false; }
        currentFocus = -1;
        /*create a DIV element that will contain the items (values):*/
        a = document.createElement("DIV");
        a.setAttribute("id", this.id + "autocomplete-list");
        a.setAttribute("class", "autocomplete-items");
        /*append the DIV element as a child of the autocomplete container:*/
        this.parentNode.appendChild(a);
        /*for each item in the array...*/
        for (i = 0; i < arr.length; i++) {
            /*check if the item starts with the same letters as the text field value:*/
            if (arr[i][0].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
                /*create a DIV element for each matching element:*/
                b = document.createElement("DIV");
                /*make the matching letters bold:*/
                b.innerHTML = "<strong>" + arr[i][0].substr(0, val.length) + "</strong>";
                b.innerHTML += arr[i][0].substr(val.length);
                /*insert a input field that will hold the current array item's value:*/
                b.innerHTML += "<input type='hidden' value='" + arr[i][0] + "'>";
                /*execute a function when someone clicks on the item value (DIV element):*/
                b.addEventListener("click", function (e) {
                    /*insert the value for the autocomplete text field:*/
                    inp.value = this.getElementsByTagName("input")[0].value;
                    /*close the list of autocompleted values,
                    (or any other open lists of autocompleted values:*/
                    closeAllLists();
                });
                a.appendChild(b);
            }
        }
    });
    /*execute a function presses a key on the keyboard:*/
    inp.addEventListener("keydown", function (e) {
        var x = document.getElementById(this.id + "autocomplete-list");
        if (x) x = x.getElementsByTagName("div");
        if (e.keyCode == 40) {
            /*If the arrow DOWN key is pressed,
            increase the currentFocus variable:*/
            currentFocus++;
            /*and and make the current item more visible:*/
            addActive(x);
        } else if (e.keyCode == 38) { //up
            /*If the arrow UP key is pressed,
            decrease the currentFocus variable:*/
            currentFocus--;
            /*and and make the current item more visible:*/
            addActive(x);
        } else if (e.keyCode == 13) {
            /*If the ENTER key is pressed, prevent the form from being submitted,*/
            e.preventDefault();
            if (currentFocus > -1) {
                /*and simulate a click on the "active" item:*/
                if (x) x[currentFocus].click();
            }
        }
    });
    function addActive(x) {
        /*a function to classify an item as "active":*/
        if (!x) return false;
        /*start by removing the "active" class on all items:*/
        removeActive(x);
        if (currentFocus >= x.length) currentFocus = 0;
        if (currentFocus < 0) currentFocus = (x.length - 1);
        /*add class "autocomplete-active":*/
        x[currentFocus].classList.add("autocomplete-active");
    }
    function removeActive(x) {
        /*a function to remove the "active" class from all autocomplete items:*/
        for (var i = 0; i < x.length; i++) {
            x[i].classList.remove("autocomplete-active");
        }
    }
    function closeAllLists(elmnt) {
        /*close all autocomplete lists in the document,
        except the one passed as an argument:*/
        var x = document.getElementsByClassName("autocomplete-items");
        for (var i = 0; i < x.length; i++) {
            if (elmnt != x[i] && elmnt != inp) {
                x[i].parentNode.removeChild(x[i]);
            }
        }
    }
    /*execute a function when someone clicks in the document:*/
    document.addEventListener("click", function (e) {
        closeAllLists(e.target);
    });
}
//----------------------------------------------------------------

//Code for creating the table
function createTable() {
    autocomplete(document.getElementById("input1"), tableArr);
    autocomplete(document.getElementById("input2"), tableArr);
    let key = document.getElementById("input1").value;
    let link = document.getElementById("input2").value;

    // let tabValue = []
    // Check if the key already exists and append that row instead of creating a new row
    let exists = tableArr.find(el => el[0] === key)
    if (exists) {
        exists[exists.length] = link
    }
    else {
        tableArr.push([key, link])
        // console.log(tableArr)
    }

    //Do the same if link exists since link as a new row too
    let existsL = tableArr.find(el => el[0] === link)
    if (existsL) {
        existsL[existsL.length] = key
    }
    else {
        tableArr.push([link, key])
        // console.log(tableArr)
    }

    // tabValue.push(key)
    // tabValue.push(link)
    // console.log(tabValue)
    // tableArr.push(tabValue)

    let table = document.createElement('table');//iterate over every array(row) within tableArr
    for (let row of tableArr) {//Insert a new row element into the table element
        let newRow = table.insertRow();//Iterate over every index(cell) in each array(row)
        newRow.id = row[0]
        // console.log(newRow.id)
        for (let cell of row) {//While iterating over the index(cell)
            //insert a cell into the table element
            let newCell = table.rows[table.rows.length - 1].insertCell();//add text to the created cell element
            newCell.innerHTML = `<div class="cell"><input type="checkbox"><label><a href="#" class="linkrow">${cell}</a></label></div>`;
        }
    }
    //append the compiled table to the DOM
    let divContainer = document.getElementById("container");
    divContainer.appendChild(table);
    // document.body.appendChild(table);

    //Add styling to container
    divContainer.classList.add("dynCont");

    // Code to scroll down to particular row>>>>>>>>>>>>>>>>>>>>>>>
    link = $('.linkrow');
    // console.log(link)
    link.click(function (e) {
        e.preventDefault();
        // console.log('clicked');
        var rowVal = $(this)[0].innerHTML,
            row;
        // console.log(rowVal)

        row = $('#' + rowVal);
        // console.log(row)
        if (row.length) {
            // console.log(row.offset().top);
            // console.log(document.documentElement.scrollHeight / 2);
            let y = (row.offset().top)
            // console.log(y)
            $(window).scrollTop(y)
        }
    });
    //----------------------------------------------------------------

}
//----------------------------------------------------------------

//Search table code
function searchTable() {
    autocomplete(document.getElementById("input1"), tableArr);
    let key = document.getElementById("input1").value;
    // alert("within search")
    let exists = tableArr.find(el => el[0] === key)
    let table2 = document.createElement('table');//iterate over every array(row) within tableArr
    let noRow = document.createElement('h3');

    if (exists) {
        // alert("within if")
        // let table2 = document.createElement('table');//iterate over every array(row) within tableArr
        //Insert a new row element into the table element
        table2.insertRow();//Iterate over every index(cell) in each array(row)
        for (let cell of exists) {//While iterating over the index(cell)
            //insert a cell into the table element
            // alert(exists)
            let newCell = table2.rows[table2.rows.length - 1].insertCell();//add text to the created cell element
            // alert(newCell)
            newCell.innerHTML = `<div class="cell"><input type="checkbox">${cell}</input><div>`;
            let divContainer = document.getElementById("container");
            // alert(table)
            divContainer.appendChild(table2);
            //Add styling to container
            divContainer.classList.add("dynCont");
        }
    }
    else {
        // let noRow = document.createElement('h3');
        noRow.textContent = "Row does not exist~"
        let divContainer = document.getElementById("container");
        // alert(table)
        divContainer.appendChild(noRow);
        //Add styling to container
        divContainer.classList.add("dynCont");
    }
    //append the compiled table to the DOM
    // document.body.appendChild(table);
}
//----------------------------------------------------------------

//Download CSV code
function htmlToCSV(html, filename) {
    //alert("Inside htmlToCSV")
    var data = [];
    var rows = document.querySelectorAll("table tr");

    for (var i = 0; i < rows.length; i++) {
        var row = [], cols = rows[i].querySelectorAll("td, th");

        for (var j = 0; j < cols.length; j++) {
            row.push(cols[j].innerText);
        }

        data.push(row.join(","));
    }
    downloadCSVFile(data.join("\n"), filename);
}

function downloadCSVFile(csv, filename) {
    var csv_file, download_link;
    csv_file = new Blob([csv], { type: "text/csv" });
    download_link = document.createElement("a");
    download_link.download = filename;
    download_link.href = window.URL.createObjectURL(csv_file);
    download_link.style.display = "none";
    document.body.appendChild(download_link);
    download_link.click();
}

function downloadFunc() {
    //alert("Inside event listener")
    var html = document.querySelector("table").outerHTML;
    htmlToCSV(html, "graphToTable.csv");
}
//----------------------------------------------------------------

//Top button code c
const toTop = document.querySelector(".goTo-top-btn");

window.addEventListener("scroll", () => {
    if (window.pageYOffset > 100) {
        toTop.classList.add("active");
    } else {
        toTop.classList.remove("active");
    }
})
//----------------------------------------------------------------

//Dark mode c
window.addEventListener("storage", function () {
    if (localStorage.lightMode == "dark") {
        app.setAttribute("light-mode", "dark");
    } else {
        app.setAttribute("light-mode", "light");
    }
}, false);
var app = document.getElementsByTagName("BODY")[0];
if (localStorage.lightMode == "dark") {
    app.setAttribute("light-mode", "dark");
}

function toggle_light_mode() {
    var app = document.getElementsByTagName("BODY")[0];
    if (localStorage.lightMode == "dark") {
        localStorage.lightMode = "light";
        app.setAttribute("light-mode", "light");
    } else {
        localStorage.lightMode = "dark";
        app.setAttribute("light-mode", "dark");
    }
}
//----------------------------------------------------------------

//sorting the table by minimum number of nodes 
function sortTableMin() {
   
    tableArr.sort(function(a, b){
        if(a.length == b.length) {
            return 0;
        }
        return (a.length < b.length)? -1:1;
    });

    generateTable();
}
//----------------------------------------------------------------

//sorting the table by maximum number of nodes
function sortTableMax() {

    tableArr.sort(function(a, b){
        if(a.length == b.length) {
            return 0;
        }
        return (a.length > b.length)? -1:1;
    });

    generateTable();
}
//----------------------------------------------------------------

function generateTable() {
    let table = document.createElement('table');//iterate over every array(row) within tableArr
    for (let row of tableArr) {//Insert a new row element into the table element
        let newRow = table.insertRow();//Iterate over every index(cell) in each array(row)
        newRow.id = row[0]
        // console.log(newRow.id)
        for (let cell of row) {//While iterating over the index(cell)
            //insert a cell into the table element
            let newCell = table.rows[table.rows.length - 1].insertCell();//add text to the created cell element
            newCell.innerHTML = `<div class="cell"><input type="checkbox"><label><a href="#" class="linkrow">${cell}</a></label></div>`;
        }
    }
    //append the compiled table to the DOM
    let divContainer = document.getElementById("container");
    divContainer.appendChild(table);
    // document.body.appendChild(table);

    //Add styling to container
    divContainer.classList.add("dynCont");
}