somtodaynt/content/js/index.js

console.log('Somtoday\'nt content script active');

function changeSlogan(message) 
{
    if (message == 'reload') {
        location.reload();
    } else {
        tonight = message[0];
        slogans = message[1];
    
        // Select random slogan
        console.log(`Loaded ${slogans.length} slogans`);
        if (slogans.length >= 1) {
            var random = Math.floor(Math.random() * slogans.length);
            var sloganText = slogans[random].toLowerCase();
            console.log(`Slogan changed to: ${sloganText}`);
        } else {
            var sloganText = "welkom bij somtodayn't";
            console.log('No slogans found')
        }
        
        // Split the slogan into array
        var sloganArray = sloganText.split(" ");
        var slogan = {
            white: '',
            blue: ''
        };
        
        // Set the last word in the array to be blue
        if (sloganArray.length > 1) {
            slogan.blue = sloganArray.pop();
            for (let index = 0; index < sloganArray.length; index++) {
                slogan.white = slogan.white + sloganArray[index] + " ";
            }
        } else {
            slogan.white = sloganArray;
        }
        
        // Edit HTML
        document.getElementById('slogan').innerHTML = 
            `<span class="white block">${slogan.white}</span>
             <span>${slogan.blue}</span>`
        ;
    
        // Add a little credit
        document.querySelectorAll('footer > span')[0].innerHTML = "Somtodayn't is een add-on door McArn.";
    
        // Set theme
        console.log(tonight);
        if (tonight) {
            var cssUrl = browser.runtime.getURL("content/css/index.css");
            var cssTag = `<link rel='stylesheet' href='${cssUrl}'>`;
            document.body.innerHTML += cssTag;
        }
    }
}

// Send request to background script
browser.runtime.sendMessage({ type: "get"});

// Receive response from background script
browser.runtime.onMessage.addListener(changeSlogan);