for example, there is a need to process the picture at the front end to determine whether the picture uploaded by the user is found on ps"s
website. I don"t seem to have seen any article in this area. I don"t know whether js has this ability
for example, there is a need to process the picture at the front end to determine whether the picture uploaded by the user is found on ps"s
website. I don"t seem to have seen any article in this area. I don"t know whether js has this ability
focus on, a very useful question.
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How to use the mobile SPA developed by vue2.0 to call the navigation and calling function of the mobile phone?
want to use vue2.0 to develop a small web application for the company, running on the mobile side. How can the above functions be achieved? ...
Feb.26,2021
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Weird problems with traversing json data?
The json string returned by the backend is converted into a json object through JSON.parse (). but appears during data traversal rendering: ( ccd is never rendered into a tag like 666)
:
json:
...
Feb.28,2021
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Ask the seniors, the problem of an abnormal display of a broadcast picture in Google browser!
novice practice, write a seamless rotation. It works well under Firefox and IE11. The first time it runs under Google browser, some pictures will not be displayed, but there is no specific error message. It needs to be manually refreshed several times b...
Mar.02,2021
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How should hotcss be used with px2rem-loader?
requirements: if my design draft is based on ip6, then in px2rem-loader s remUnit=75, hotcss
document.documentElement.style.fontSize = ( innerWidth*20 320 ) + px ;
Is 320 set to 375 for ?
...
Mar.02,2021
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How to use js to simulate text as a password type?
since my website does not use https, to access the login page of my website under firefox, firefox will clearly indicate that the link to this site is not secure and the login information entered will be stolen.
I would like to ask, how can I change t...
Mar.02,2021
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About the front-end template engine?
template engine can greatly simplify the rendering of front-end data, so who is better in terms of performance than the template engine or the native string stitching through loops? Are there any good lightweight template engines available? ...
Mar.02,2021
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About the vue data-driven problem?
questions and requirements: it is said that vue is data-driven, so for requirements similar to accordion (click on a li, to display the contents of the corresponding li, how can it be achieved through data-driven without operating dom? )
such as the f...
Mar.05,2021
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The implementation scheme of vue: generating route (dynamic route) according to the value from the background
the company wants to do a background management system, and then different roles may correspond to different left menus, that is, a dynamic route, and everyone can see different things. I have seen the document of "Flower underpants " before, that is,...
Mar.06,2021
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Some encapsulation about the common functions of the page?
question: in some current projects, such as the first column of the first row of the table is fixed, the form radio and all selections are implemented by themselves using js (not considering using the framework for the time being). So how to effectively ...
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How do I cache jquery selectors?
demand:
var str = $( -sharpdiv1 .list );
after caching the above code, how should I reuse str if I want to use $( - sharpdiv1. List td ) later in the coding process?
...
Mar.15,2021
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What is the problem with an instance of new?
html:
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>test< title>
<link rel="stylesheet" href=". showbox.css">
< head>
<bod...
Mar.19,2021
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About the source code of the javascript plug-in?
the source code of many js plug-ins is as follows:
CommonJs
if (typeof module !== undefined && module.exports) module.exports = MyPlugin;
AMD CMD
if (typeof define === function ) define(function() { return MyPlugin; });
what is th...
Mar.21,2021
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What on earth is webpack4 sideEffects?
Wow! I carefully read webpack > v4.16.0 > documentation > Guide > Tree Shaking s introduction to sideEffects, whether in terms of the meaning on the surface of his document or in context, the attribute sideEffects seems to be used to cut out unintroduc...
Mar.28,2021
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How does WeChat Mini Programs achieve this different drop-down refresh?
my layout implementation here is handwritten tab navigation (all, essence line). The drop-down refresh provided by WeChat Mini Programs must pull the entire Page page, which will pull down the navigation bar, so it uses the scrolltoupper event of < scro...
Apr.03,2021
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Vue's animated transition doesn't work.
< script src= ".. vue.js " > < script >
<title>Document< title>
<style>
.fade-enter{
opacity: 1;
}
.fade-enter-active{
transition: opacity 3s;
}
< style>
< head > < body >
<div id=&qu...
Apr.08,2021
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What is the method of front-end persistent storage with simple operation, good compatibility and can store a large amount of data?
recently the development process encountered a problem: there is a large amount of data on the page that needs to be temporarily stored, used in other modules, and cleared when the page is closed. the original sessionStorage, is easy to use and has go...
May.26,2021
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Ask for help to design an algorithm, but you can't figure out how to achieve it. How to write this in code?
write a merge function
[
{ start: 1, end: 2 },
{ start: 2, end: 3 },
{ start: 5, end: 6 },
{ start: 3, end: 5 },
{ start: 8, end: 9 },
]
The parameter is an array
if the parameters only have {start: ...
Jul.15,2021
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For the picture upload process, the front end asks for an explanation.
Image upload process. The front end asks for an explanation ...
Nov.23,2021
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How do front-end developers set technical goals?
how to find a point that is good for team development project and start to do it for newcomers who are just getting started one idea is that they can find ways to improve according to the troubles and other problems encountered at work, but I really ...
Jun.17,2022
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What is the use of constructor? you can print successfully without writing it.
function Animal(){
this.species = "";
}
function Cat(name,color){
this.name = name;
this.color = color;
}
Cat.prototype = new Animal();
Cat.prototype...
Jun.18,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-28f1e81-b8b4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-28f1e81-b8b4.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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