WebExtension main JS to add current URL to PIM (PmWiki POST API)

background.js

// Based on https://github.com/mdn/webextensions-examples/tree/master/bookmark-it

/*
 * Add the bookmark on the current page.
 */
function addToBucket() {
  fetch('https://fabien.benetou.fr/PIMVRdata/URLBucketTest?action=source')
          .then( response => { return response.text() } )
          .then( data => {
                  var writeURL = 'https://fabien.benetou.fr/PIMVRdata/URLBucketTest?action=edit';
                  fetch(writeURL, {
                          method: 'POST',
                          headers: {'Content-Type':'application/x-www-form-urlencoded'},
                          body: "post=1&author=PIMVR&authpw=mypassword&text="+data+'%0a'+currentTab.url
                  }).then(res => res).then(res => console.log(res))
  })
}

browser.browserAction.onClicked.addListener(addToBucket);

/*
 * Switches currentTab to reflect the currently active tab
 */
function updateActiveTab(tabs) {

  function isSupportedProtocol(urlString) {
    var supportedProtocols = ["https:", "http:", ];
    var url = document.createElement('a');
    url.href = urlString;
    return supportedProtocols.indexOf(url.protocol) != -1;
  }

  function updateTab(tabs) {
    if (tabs[0]) {
      currentTab = tabs[0];
    }
  }

  var gettingActiveTab = browser.tabs.query({active: true, currentWindow: true});
  gettingActiveTab.then(updateTab);
}

// listen to tab URL changes
browser.tabs.onUpdated.addListener(updateActiveTab);

// listen to tab switching
browser.tabs.onActivated.addListener(updateActiveTab);

// listen for window switching
browser.windows.onFocusChanged.addListener(updateActiveTab);

// update when the extension loads initially
updateActiveTab();