bugs-n-errors/script.js at main · pmccc-profile/bugs-n-errors · GitHub

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//console.dir(document); //shows all the properties, methods inside the <!DOCTYPE html>

/*
 * var = global variable declaration
 * let = accessible only to its function scope
 * const = fixed variable value
 * localStorage - saves data indefinitely until explicitly deleted
 */

//GLOBAL VARIABLES DECLARATION
const html_body = document.querySelector('body');
const main_header = document.querySelector('#main-header');
const navbar = document.querySelector('nav');
const main_section = document.querySelector('section');
const main_footer = document.querySelector('#main-footer');

const footerEnd = main_footer.querySelector('.footer-end');
/*****/

//FUNCTIONS

//retain theme on load
document.addEventListener("DOMContentLoaded",function(){
    const setMode = localStorage.getItem("mode"); //for UI theme
    const i_switchMode = localStorage.getItem("iconSwitch"); //for toggle icon state

    //update changes accordingly
    toggleMode(setMode);

    //retain icon state
    let toggleIcon = navbar.querySelector("#toggle-icon i");

    if(i_switchMode === "on"){
        //switch icon to 'on'
        toggleIcon.classList.add("fa-toggle-on");
        toggleIcon.classList.remove("fa-toggle-off");
    }else{
        //switch icon to 'off'
        toggleIcon.classList.add("fa-toggle-off");
        toggleIcon.classList.remove("fa-toggle-on");
    }
});

//toggle theme icon
navbar.querySelector("#toggle-icon").addEventListener("click",function(event){

    event.preventDefault(); //prevent page reload

    //check which element was clicked
    let i_icon = event.target;

    //if <a> or <li> was clicked, find the <i> inside it
    if (i_icon.tagName.toLowerCase() !== 'i') {
        i_icon = event.target.querySelector('i');
    }

    //if <i> was clicked or found, change its class name
    if (i_icon.tagName.toLowerCase() == 'i'){
        i_icon.classList.toggle("fa-toggle-off");
        i_icon.classList.toggle("fa-toggle-on");
    }

    let mode = i_icon.classList.contains("fa-toggle-on") ? "dark" : "light";

    let iconSwitch = i_icon.classList.contains("fa-toggle-on") ? "on" : "off";

    //update changes accordingly
    toggleMode(mode);

    //save toggle mode for UI theme
    localStorage.setItem("mode",mode);
    //save toggle icon state
    localStorage.setItem("iconSwitch",iconSwitch);
});

//mode is funciton's parameter
function toggleMode(mode){

    //mode = toggle

    const arrTags = [html_body,main_header,navbar,main_footer,footerEnd];
    let arrColor = ["white","black"];
    let brdrColor = "2px solid black";

    if(mode==="dark"){
        arrColor = ["black","white"];
        brdrColor = "2px solid red";
    }else{
        arrColor = ["white","black"];
        brdrColor = "2px solid black";
    }

    for(let i=0; i<arrTags.length; i++){

        arrTags[i].style.backgroundColor = arrColor[0];
        arrTags[i].style.color = arrColor[1];

        if(arrTags[i]===navbar || arrTags[i]===footerEnd){
            arrTags[i].style.borderBlock = brdrColor;
        }
        if(arrTags[i]===main_footer){
            arrTags[i].style.borderTop = brdrColor;
        }

        if(mode!="dark"){
            if(arrTags[i]===main_header || arrTags[i]===navbar || arrTags[i]===main_footer || arrTags[i]===footerEnd){
                arrTags[i].style.backgroundColor = "#FAF9F6";
                arrTags[i].style.color = arrTags[1];

                if(arrTags[i]===main_footer){
                    arrTags[i].style.borderTop = "none";
                }
            }
        }
    }

    //selects all a in the navbar
    const navlist = navbar.querySelectorAll('a');
    toggleMode_1(mode,navlist);

    //tricky, added to ensure functional and uniformed theme
    if(!(window.location.toString().includes("playground") || (window.location.toString().includes("cpp")))){

        //selects all img and button in main_section
        let descImg = main_section.querySelectorAll('img');
        let btn = main_section.querySelectorAll('button');

        let arrImgs = ["img/cpp.png","img/r.png","img/sql.png"];
        let imgBorder = "none";
        let imgRadius = "none";
        let btnBgColor = "white";

        if(mode==="dark"){
            arrImgs = ["img/cpp_dark1.png","img/r_dark1.png","img/sql_dark1.png"];
            imgBorder = "2px solid red";
            imgRadius = "50%";
            btnBgColor = "transparent";
        }else{
            arrImgs = ["img/cpp.png","img/r.png","img/sql.png"];
            imgBorder = "none";
            imgRadius = "none";
            btnBgColor = "white";
        }

        for(let i=0; i<arrImgs.length; i++){
            descImg[i].src = arrImgs[i];
            descImg[i].style.border = imgBorder;
            descImg[i].style.borderRadius = imgRadius;
        }

        for(let i=0; i<btn.length; i++){
            btn[i].style.backgroundColor = btnBgColor;
        }
    }

    //selects all a in the main_footer
    const footerlist = main_footer.querySelectorAll('a');
    toggleMode_1(mode,footerlist);

}

function toggleMode_1(mode,element){

    txtColor = "black";
    bgColor = "transparent";

    if(mode==="dark"){
        txtColor = "white";
        bgColor = "transparent";
    }else{
        txtColor = "black";
        bgColor = "transparent";
    }

    for(let i=0; i<element.length; i++){

        element[i].style.color = txtColor;
        element[i].style.backgroundColor = bgColor;

        //hover effect
        element[i].addEventListener('mouseenter', function(event) {

            if (mode==="dark"){
                txtColor = "red";
                bgColor = "black";
            }else{
                txtColor = "white";
                bgColor = "#36454F";
            }

            event.target.style.color = txtColor;
            event.target.style.backgroundColor = bgColor;

        });
        element[i].addEventListener('mouseleave', function(event) {

            if (mode==="dark"){
                txtColor = "white";
                bgColor = "black";
            }else{
                txtColor = "black";
                bgColor = "#FAF9F6";
            }

            event.target.style.color = txtColor;
            event.target.style.backgroundColor = bgColor;

        });
    }
}

const main_sect_button = main_section.querySelectorAll(".learn-more-button");
main_sect_button.forEach(sect_button=>{
    sect_button.addEventListener("click",()=>{
        if(sect_button.id === "btn-cpp"){
            document.location="cpp.html";
        }else{
            alert("A work in progress.");
        }
    });
});