webRequest.Streamfilter.error

A string that will contain an error message after the onerror event has fired.

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

This example adds an onerror listener which logs the value of error.

function listener(details) {
  let filter = browser.webRequest.filterResponseData("12345");

  filter.onerror = event => {
    console.log(`Error: ${filter.error}`);
  }

  //return {}; // not needed
}

browser.webRequest.onBeforeRequest.addListener(
  listener,
  {urls: ["<all_urls>"], types: ["main_frame"]},
  ["blocking"]
);