telnet command to test mail server connectivity telnet mailaws.swiretest.com 25 helo mailaws.swiretest.com mail from: < [email protected] > #发件账户rcpt to: < [email protected] > #收件账户data Must be entered right the first time, no chance of fallback Each line entered should prompt 200 OK Indicates that the network connectivity between the server and the mail server is OK

After years of hard work, on June 6th, the IETF (Internet Engineering Task Force) officially released the HTTP/3 RFC, which is the third major version of the Hypertext Transfer Protocol (HTTP), and the complete RFC exceeds 20,000 Word, which explains HTTP/3 in great detail. HTTP history 1991 HTTP/1.1 2009 Google designed SPDY over TCP 2013

At present, more and more developers connect multiple monitors to work, but have you found that when you open a new window in the browser, it will only be displayed on your current monitor. If you want to place it in a browser , you need to drag the window over, is it possible to

On the PHP server side, there are concepts of Session and Cookie, and on the JS side, there are corresponding concepts of Session and Cookie. Cookie of JS, you can use cookie.js to complete the corresponding operation. For details, see the chapter Cookie.js realizes the operation of saving user name and password (4) . Use

sessionStorage can be set with setItem, obtained with getItem, deleted with removeItem, and cleared with clear. For details, see MDN MDN explained sessionStorage property allows you to access a session Storage object. It is similar to localStorage , the difference is that the data stored in localStorage has no expiration time setting, and the data

if (performance.navigation.type == 1) { alert( “This page is reloaded” ); } … The post js to detect if the page is refreshed (perform an action after each refresh) first appeared on Lenix Blog . This article is reprinted from https://blog.p2hp.com/archives/8917 This site is for inclusion only, and the copyright belongs to the original author.

.at() method on built-in indexables RegExp Match Indices Object.hasOwn Error cause Top-level await Class field declarations Ergonomic brand checks for private fields .at() method on built-in indexables .at method on built-in indexables ? . const cart = [ ‘?’ , … The post ES2022 New Features at a Glance first appeared on Lenix Blog .

The role of the sleep function is to let the thread sleep and wait until the specified time to wake up again. Method 1: This implementation uses a pseudo-infinite loop to block the main thread. Because JS is single threaded. So in this way, the real sleep() can be realized. function sleep(delay) { var start

var ws = new WebSocket(‘ws://localhost:9222/devtools/page/3c5c05fa-80b7-4cfe-8d1d-ebe79a7a5730’); ws.onopen= function() { ws.send(‘{“id”: 1, “method”: “Page.navigate”, “params”: {“url”: “https://www.fangdushi.com”}}’) }; ws.onmessage = function(evt) { console.log(‘Received a message from the server!’+evt.data); }; API documentation address https://chromedevtools.github.io/devtools-protocol/1-2 … The post Chrome debugging WebSocket first appeared on Lenix Blog . This article is reprinted from https://blog.p2hp.com/archives/8911 This site is for inclusion only,

How to check directory size in Linux ubuntu centos du command Reference article: how to check directory size in Linux Used to display the size of a directory or file. Display the current directory file or file occupied space: du Display the size of the specified file or folder: du test.txt Check the space occupied