Check if a given key already exists in the dictionary

I want to test whether a key exists in the dictionary before updating its value. I wrote the following code: i...

From [HTMLdiscussion group] 2023-10-08 11:38:59 0  2  878

是不是所有后台给的接口都需要跨域？

前后端分离，后台只是给一个接口给前端，前端是不是对所有后台给的接口作跨域处理.

From [HTMLdiscussion group] 2016-11-12 13:26:47 0  2  878

How to format a date with time zone offset using ISO 8601 in JavaScript?

Goal: Find the local time and UTC time offset and then construct the URL in the following format. Example URL:...

From [HTMLdiscussion group] 2024-03-25 15:40:11 0  2  877

Share data between HTML pages

I want to send some data from one HTML page to another. I send data via query parameters like http://localhost...

From [HTMLdiscussion group] 2023-10-16 22:00:21 0  2  877

javascript - Problems with vue.extend in different development environments! !

First of all, my development environment is the webpack project of vue init. As a newbie who is learning vue.j...

From [HTMLdiscussion group] 2017-06-22 11:53:54 0  1  877

How to practice practical skills in html?

From [HTMLdiscussion group] 2017-06-16 15:40:51 0  1  877

html5 - html table标签到底重在哪里？该不该用？

在刚接触html的时候，从某地方看到说html的table标签非常重型，会降低性能，最好不用。(国内某大型在线教育平台官推的课程的老师， 绝对说过 我还记了笔记...) 于是这句话被当时自己深深记在脑海。能用div的地方...

From [HTMLdiscussion group] 2017-04-17 14:51:40 0  8  877

前端 - 如何通过设置viewport让页面在手机上480px和640px自适应显示？

如何通过设置viewport让页面在手机上480px和640px自适应显示？

From [HTMLdiscussion group] 2017-04-17 11:26:29 0  1  877

Merging HTML and C++: Realizing the combination of HTML and C++

I'm new to both html and c++ but have a lot of knowledge in c#. I just wrote my first 100% C++ program, a smal...

From [HTMLdiscussion group] 2023-09-02 17:11:20 0  1  876

createjs 小游戏点击画布内对象 卡顿

做了一个很简单小游戏，东西上升，点击后消失，用的框架是createjs。但发现在微信端点击游戏里面的对象时会有短暂的卡顿 不知道是代码写的哪里不对影响性能了，并且andriod 在微信里看的时候对象上升也会有一些卡顿。求...

From [HTMLdiscussion group] 2016-10-28 10:42:44 0  1  876

nodejs代理包含图片的formdata请求

怎么用nodejs转发包含img的formdata请求，自己写了一个，但不对var request = http.request(options,function(result){ ...

From [HTMLdiscussion group] 2016-10-24 13:51:47 0  0  876

HTML5 video M3U8 encoded with Base64

I want to add a base64 encoded M3U8 file in the Video tag of HTML5, how can I do it<!DOCTYPEhtml><htm...

From [HTMLdiscussion group] 2023-09-09 23:07:18 0  1  875

I want to modify the initial value of time, please give me some advice.

From [HTMLdiscussion group] 2021-02-14 17:36:21 0  0  875

javascript - How vue.js captures the front-end exception triggered by the user and gets the number of lines of code before it is packaged.

Before the project goes online, prepare an exception capture function to proactively understand where bugs exi...

From [HTMLdiscussion group] 2017-06-20 10:06:27 0  1  875

javascript - Front-end page problem: Divide a page into several pages to write, but when running an index, the complete page is displayed

Front-end page problem: Divide a page into several pages to write, but when running an index, the complete pag...

From [HTMLdiscussion group] 2017-06-07 09:24:23 0  5  875