If you’re in the global scope, there’s not much difference. Read Kangax’s answer for explanation If you are in a function, then var will create a local variable, “without var” will look up the scope chain until it finds the variable or reaches the global scope (at which point it will create it) There is […]
What is the difference between declaring a variable with and without var in javascript Read More »
1. Pop up a full screen window <html> <body onload=”window.open(‘http://lre.cn’,’example01′,’fullscreen’);”>; <b>www.lre.cn</b> </body> </html> 2. Pop up a window that has been transformed by F11 <html> ＜body onload=”window.open(”http://lre.cn’,’example02′,’channelmode’);”>; <b>www.lre.cn</b> </body> </html> 3. Pop up a window with a favorite link toolbar <html> ＜body onload=”window.open(‘http://lre.cn’,’example03′,’width=400,height=300,directories’);”> <b>www.lre.cn</b> </body> </html> 4. Web page dialog <html> <SCRIPT LANGUAGE=” javascript ”>
js popup window list Read More »
Author of this issue SYS team The System Department (SYS) team of Station B provides infrastructure support for all services of Station B, including data center, network, computing power, system software, and hybrid cloud management. 01 Background As we all know, Station B has become an Internet company with considerable size without knowing it. Xiaopozhan,
Bilibili Server Basic Performance Tuning and Evaluation Practice – AMD Articles Read More »
Method 1: sfnttool sfnttool.jar is a tool in Google’s open source project sfntly, which can extract the desired text from a specified font and export a smaller font size. Download address: https://github.com/googlefonts/sfntly This must be allowed in a java environment. So if there is no java environment, you can install the java environment first Download
font compression tool Read More »
1. Use the sfnttool tool. sfnttool is a java tar package. The download address is Alibaba Cloud Disk. 2. Unzip after downloading, open powershell in the download folder for windows, and run the following commands directly in the current folder for linux (the java runtime environment is required, and the configuration method of the Java
PHP+java realizes dynamic generation of fonts Read More »
… The post Asynchronous Programming: Promise, async, await (#js #javascript) first appeared on Lenix Blog . This article is reprinted from https://blog.p2hp.com/archives/9802 This site is for inclusion only, and the copyright belongs to the original author.
Asynchronous programming: understand Promise, async, await in one go (#js #javascript) Read More »
Because JavaScript syntax is not rigorous enough, it has been criticized by people. For example, when using a variable, it can be declared in advance without using the var keyword (for example: url = ‘http://javascript.p2hp.com/’; ), at this time The JavaScript interpreter automatically creates this variable for you. In order to make the code more
JS strict mode (use strict) detailed Read More »
The video tag will not automatically fill the entire div, even if it is set to a height of 100%; so when the video tag needs to fill the entire div, you can add the ‘object-fit:fill’ style to the video tag, so that That’s it! <div class=”videoContent”> <video class=”videoElement” controls preload=”auto” width=”100%” height=”100%”></video> </div> .videoContent{
The video tag style covers the full screen Read More »
Generally, product list pages are all product pictures with a white background. Sometimes I feel that the white background is not good. If I want to change to a gray or other light background, do I need to reprocess the pictures? The bottom picture is displayed transparently, so that we define any background color under
Drag and drop does not move the element, if you want the element to move on drop you have to set the element’s new position in the drop event. I made an example that works for Firefox and Chrome, here are the gist: function drag_start ( event ) { var style = window.getComputedStyle( event .target,
HTML5 drag and drop elements anywhere on the screen Read More »
This refers to the page zoom level caused by Ctrl + scroll wheel Use Math.round(window.devicePixelRatio * 100); That’s it. … The post How to detect the zoom level of a page first appeared on Lenix Blog . This article is reprinted from https://blog.p2hp.com/archives/9789 This site is for inclusion only, and the copyright belongs to the
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Abstract: The purpose of maintaining the server is to keep the performance of the server in the best state, solve problems in time, and tune related applications and configurations without problems. The daily maintenance of the server includes hardware maintenance and software maintenance. When maintaining the server, you must first perform security testing, perform data
HTTP (Hypertext Transfer Protocol) is the application layer transport protocol on which the World Wide Web is based. Originally conceived in the late 1980s as a single-line text-based protocol, initially documented as HTTP/0.9 , its first fully functional iteration (v. 1.0) was documented in 1996 in RFC 1945. As the use and expectations of the
HTTP/2 vs HTTP/3: Comparison Read More »