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App Inventor 2 MQTT拓展入门（保姆级教程） · App Inventor 2 中文网
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APPINVENTOR测试平台：AppInventor2中文网（https://www.fun123.cn）
MQTT组件：已内置，设计器「通信连接」里的「MQTT客户端」直接拖入即可，本教程用到的功能它全都有；需要证书认证、遗嘱消息等高级用法时，...
App Inventor 2 接入腾讯云 CloudBase：让你的 App 瞬间拥有专业级后端能力...
...入方案，此拓展将免费开放给所有用户！
官方文档：https://www.fun123.cn/reference/extensions/CloudBase.html
五大核心组件，覆盖全场景
1. CloudBaseAuth - 身份认证：注册、登录、图片验证码、短信/邮箱验证码、Token管理
2. CloudBaseFuncti...
URL query parameters to dict python
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
What is a “surrogate pair” in Java?
... in Java-12, should work in all Java versions above 5.
As mentioned here: https://stackoverflow.com/a/47505451/2987755,
whichever character (whose Unicode is above U+FFFF) is represented as a surrogate pair, which Java stores as a pair of char values, i.e. the single Unicode character is represente...
CSS: Change image src on img:hover
...displayed or hidden accordingly on :hover
HTML
<a>
<img src="https://cdn4.iconfinder.com/data/icons/imoticons/105/imoticon_15-128.png" />
<img src="https://cdn4.iconfinder.com/data/icons/imoticons/105/imoticon_12-128.png" />
</a>
CSS
a img:last-child {
display: ...
How to send JSON instead of a query string with $.ajax?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Deadly CORS when http://localhost is the origin
... extensions worked for me, so I installed a simple local proxy. In my case https://www.npmjs.com/package/local-cors-proxy
It is a 2-minute setup:
(from their site)
npm install -g local-cors-proxy
API endpoint that we want to request that has CORS issues:
https://www.yourdomain.ie/movies/...
App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件 - Ap...
...是最大门槛，但只需要做一次。
# 1. 克隆仓库
git clone https://github.com/mit-cml/appinventor-sources.git
cd appinventor-sources
# 2. 确认依赖
# 需要 JDK 8、ant、Python 2.7（或3.x兼容模式）
java -version
# 3. 编译核心库
ant MakeExtensions
国内...
How to get URL of current page in PHP [duplicate]
...
Should you not check if HTTPS:// is enabled? I found this function to check: function isSSL() { return (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') || $_SERVER['SERVER_PORT'] == 443; }
– Dendro...
How to extract base URL from a string in JavaScript?
... human readable and this way is better... in my opinion.
var pathArray = "https://somedomain.com".split( '/' );
var protocol = pathArray[0];
var host = pathArray[2];
var url = protocol + '//' + host;
Or use Davids solution from below.
...