A string that will contain an error message after the
onerror
event has fired.
BCD tables only load in the browser
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"]
);
最后修改： , 由 MDN 贡献者