Chrome - Extension - isAllowedFileSchemeAccess - Demo

ext_isAllowedFileSchemeAccess_demo.js

const LOCAL_FILE_REGEX_WINDOWS = new RegExp('^([A-Za-z]:[^\<\>\:\"\|\?\*]+)');
const LOCAL_FILE_REGEX_MAC = new RegExp('^(file:\//\/)');

chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
  if (!tabs[0]) {
    return;
  }

  let url = tabs[0].url;

  if (url.match(LOCAL_FILE_REGEX_WINDOWS) || url.match(LOCAL_FILE_REGEX_MAC)) {

    chrome.extension.isAllowedFileSchemeAccess(
      function(isAllowedAccess) {
        if (!isAllowedAccess) {
        
          alert('Please allow the extension to access your local files')
          // You can get the message from 1i8n (internationalization) like the following code:
          // alert(chrome.i18n.getMessage('<your variable name>'));
          
          // create a new tab to show the information of your extension
          chrome.tabs.create({
            url: 'chrome://extensions/?id=' + chrome.runtime.id
          });
          
          return
        } // if condition
      } // isAllowedFileSchemeAccess function callback
    ) // isAllowedFileSchemeAccess function
  } else {

    // Do something ...

  }
})