webRequest.StreamFilter.error

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

Browser compatibility

Examples

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

js
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"],
);