problem scenario: the recently developed Vue project found that the network is too poor, causing the first screen of the page to go blank for nearly 3 seconds. You want to optimize the first screen rendering problem. Optimization scheme: 1 reduce co...
what is the default for css if you do not specify line-height? Is it equal to font-size? Sometimes it feels like setting it manually to be the same as font-size is not the same as letting him not set it by default. ...
question 1: the combined class selector selects the node behind it, so how do you choose the previous one? <a href="https: segmentfault.com" class="p1">This is a paragraph.1< a> <a href="https: segmen...
encounters a problem with first-child
multiple layers are nested with each other, and then use the p:first-child selector, which cannot be selected correctly. Code: <body> 111 222 333 < body> use p:first-child {color:red;} at this time,...
I currently use kong as a gateway, thinking that I can add simple authentication through basic auth. After practice, it is found that ajax requests can not be sent. I know that ajax can add headers to do basic auth, but I don t want to change the app...
there is a Thinkpad notebook with a label Windows 8 pro, at the bottom. At present, the boot automatically enters the Centos system. How to verify whether there is a Windows system? from the boot boot point of view, you can only choose different kernel v...
use the form component of antd, the form element limit is required, and the form has the function of uploading attachments. I call an interface with ajax and assemble data including attachments with FormData. At this time, you need to set the parameter ...
the default program entry for projects created using create-react-app is index.js,. The default home page is public index.html. But I want to do multiple web pages in the project, how can I associate index.js and index.html in the about directory? ...
1.1: 3.4: ? : :; :3.2,APP ; ? ...