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,...
in the vue-cli project, I registered service worker was registered with scope: static 1. Does this mean that service worker will only process requests that start with static? Other requests, such as logon, test, are no longer cached? 2. If...
two puzzles: 1 are production dependencies and development dependencies not duplicated? Does that mean local development depends on production + development? 2 won t executing build type dependencies into packages in development dependencies when the ...
if this is the problem, how to solve it? ...
want to install a linux family system for notebooks, such as home-made deepin,Manjaro systems with relatively complete functions and teams (with less bug than at night s image interface); 1. Tried the original centos7 everything can not boot is made of...
methods: { srcValue: function (status) { if(status==2) return Image OK.png if(status==3) return Image Error.png if(status==1) return Image waitin...