web | 易学教程

Why is the event dispatched by window not captured by other elements?

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问题 <body> <div id="d"></div> <script> document .getElementById("d") .addEventListener("test", () => console.log("div"), true); document.body.addEventListener("test", () => console.log("body"), true); window.addEventListener("test", () => console.log("window")); window.dispatchEvent(new CustomEvent("test")); </script> </body> If you run the code above, you will only see one output. 回答1: Custom event was only set for window. Try this in your script. <script> document.getElementById("d")

Xampp mysql not starting v3.2.4

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问题 I tried deleting the aria_log_control file I tried changing the port I tried deleting aria_log.0000001 file I tried deleting both aria_log_control and aria_log.0000001 file I am running the control panel as admin I also tried restarting my computer multiple times it was working properly just a day ago though i had to delete aria_log_control file multiple times edit : after a lot of research I found my answer in this post so I am linking it here turns out i had to run the aria_chk file in bin

Xampp mysql not starting v3.2.4

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Xampp mysql not starting v3.2.4

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Flutter Web: How to disable backward button of browser in flutter web application

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问题 After successfully login the user redirected to the Home page but when the user clicks on the browser back button it easily redirected to the login screen. What should I do to disable backward redirection? 回答1: class SecondPage extends StatelessWidget { @override Widget build(BuildContext context) { /// Hope WillPopScope will do the job for you. return WillPopScope( onWillPop: () async => null, child: Scaffold( body: Center( child: Text('asd'), ), ), ); } } 来源： https://stackoverflow.com

Firebase Hosting Flutter Web App not clearing Cache of first deploy

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问题 We build a flutter web app and deployed it via firebase hosting. Unfortunately, we didnt configure any caching settings in our initial deploy. Now we deployed a newer version of our website but people still get the old website shown form the first deploy. What we tried so far: Adding version no. to our index.html: <"script src="main.dart.js?version=1" type="application/javascript"></script> Adding meta Data in our header in index.html: <meta http-equiv="Cache-Control" content="no-cache, no

Firebase Hosting Flutter Web App not clearing Cache of first deploy

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Can we override parent website's web.config?

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问题 I have a website and a sub website. Now I am facing problem that is my sub website's web.config file is inheriting parent website's web.config file. My parent website's web.config file has some <configSections> and my sub website does not need these <configSections> . How can I do this ? I try to search net but find nothing helpful. 回答1: Yes, you can specify allowOverride in the parent web.config in a location section to allow child web.config values to override the parent ones. You can also

Can we override parent website's web.config?

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Firebase web push notification Service worker issue

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问题 I am new to web push notification area. I want to send firebase web notifications from web to web. I tried doing that and ended up with this error FirebaseError: Messaging: We are unable to register the default service worker. Failed to register a ServiceWorker: A bad HTTP response code (404) was received when fetching the script. (messaging/failed-serviceworker-registration) I dont know where am I went wrong. Thanks in Advance 回答1: You need to add the service worker file firebase-messaging