stammtv-helper/base/options/options.js

const stammTVBaseUrl = document.getElementById('stammtv-base-url');
const stammTVWSSUrl = document.getElementById('stammtv-wss-url');
const saveButton = document.getElementById('save');

// Saves options to chrome.storage
function save_options() {
    let valid = true;
    if (stammTVBaseUrl.value.startsWith('http')) {
        stammTVBaseUrl.classList.add('is-valid');
        valid = valid && true;
    } else {
        stammTVBaseUrl.classList.add('is-invalid');
        valid = false;
    }

    if (stammTVWSSUrl.value.startsWith('wss://')) {
        stammTVWSSUrl.classList.add('is-valid');
        valid = valid && true;
    } else {
        stammTVWSSUrl.classList.add('is-invalid');
        valid = false;
    }

    if(valid) {
        chrome.storage.local.set({
            baseURL: stammTVBaseUrl.value,
            wssURL: stammTVWSSUrl.value
        }, function () {
            // Update form controls to let user know options were saved.
            saveButton.classList.replace('btn-primary', 'btn-success');
            saveButton.classList.replace('btn-danger', 'btn-success');
            saveButton.textContent = '... saved!';
        });
    } else {
        saveButton.classList.replace('btn-primary', 'btn-danger');
        saveButton.classList.replace('btn-success', 'btn-danger');
        saveButton.textContent = '... failed to save!';
    }
}

// Restores select box and checkbox state using the preferences
// stored in chrome.storage.
function load_options() {
    chrome.storage.local.get({
        baseURL: 'Please fill in.',
        wssURL: 'Please fill in.'
    }, function (items) {
        stammTVBaseUrl.value = items.baseURL;
        stammTVWSSUrl.value = items.wssURL;
    });
}

document.addEventListener('DOMContentLoaded', load_options);
saveButton.addEventListener('click', save_options);