javascript - How to run a script once error handlers for all script tags have finished? -

-

i have few resources load defer cdn, so:

<script src="js/sri-fallback.js"></script> <script defer       src="https://code.jquery.com/jquery-3.1.0.min.js"       integrity="sha256-ccuebr6csya4/9szppfrx3s49m9vuu5bgtijj06wt/s="       data-fallback="js/jquery.min.js"       crossorigin="anonymous" onerror="resource_error(this)"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"         defer         data-fallback="js/bootstrap.min.js"         integrity="sha384-tc5iqib027qvyjsmfhjomalkfuwvxzxupncja7l2mcwnipg9mgcd8wgnicpd7txa"         crossorigin="anonymous" onerror="resource_error(this)"></script> <script src="js/do_jquery_stuff.js" defer></script>

sri-fallback.js script trying use automatically handle failure when loading cdn (such incorrect hash or cdn being down). looks this:

function resource_error(element) {     var fallback_url = element.dataset.fallback;     var script = document.createelement('script');     script.src = fallback_url;     document.head.appendchild(script); }

this works, problem resources loaded in order:

  1. jquery via cdn (fails)
  2. bootstrap via cdn (fails)
  3. do_jquery_stuff.js (succeeds)
  4. jquery locally (succeeds)
  5. bootstrap locally (succeeds)

this means do_jquery_stuff.js fails because depends on jquery, not loaded when runs.

how can run do_jquery_stuff.js when scripts have loaded?

as you're handling failure of loading file own js, think solution here make do_jquery_stuff.js runned dynamically, after checked scripts have been loaded.

one solution see, bind onload event on each of deferred scripts new function of sri-fallback.js. way, you'll able know scripts have succeeded, have failed, , you'll know when every of them succeed. you'll have count how many scripts have loaded.

once know every script has been loaded successfully, append do_jquery_stuff.js page dynamically.


Comments

Post a Comment

Popular posts from this blog

mysql - Dreamhost PyCharm Django Python 3 Launching a Site -

-
i'm new python/django , created simple django website using pycharm. site works fine running on computer, i'm lost when comes taking site onto host (dreamhost). i'm able upload files correct directories fine, , believe made correct changes database on mysql. i'm not sure go there though. right now, page shows files rather site. direction appreciated. much! you should not run django application using python manage.py runserver on production. how run application on django depends on server (apache, nginx) want use for apache - https://docs.djangoproject.com/en/1.10/howto/deployment/wsgi/modwsgi/ for nginx - https://www.digitalocean.com/community/tutorials/how-to-serve-django-applications-with-uwsgi-and-nginx-on-ubuntu-14-04 the mysql database should, of course, exist , have correct credentials. or, if choose use sqlite, file should accessible, readable , writable www-user (may different depending on linux distributive)
Read more

java - Sending SMS with SMSLib and Web Services -

-
i have made rest web service send smss using hsdpa usb modem. using smslib in java send smss. every time web service invoked, create gateway start service, send message, stop service , remove gateway. takes 20 seconds each message. found starting service takes lot of time. part of code use send smss service.getinstance().addgateway(gateway); service.getinstance().startservice(); outboundmessage msg = new outboundmessage(phonenumber, message); if (service.getinstance().sendmessage(msg)) { result = "message sent successfully!!"; } else { result = "could not send message."; } service.getinstance().stopservice(); service.getinstance().removegateway(gateway);//remove gateway is there way can start service once if not started , use send message when ever web service invoked? why dont group messages , send in 1 go? service.getinstance().sendmessages(messa...
Read more

java - How to resolve The method toString() in the type Object is not applicable for the arguments (InputStream) -

-
i'm trying read json file local machine. @path("/") public class jsonparsing { file f = new file("file.json"); if (f.exists()){ inputstream = new fileinputstream("file.json"); string jsontxt = ioutils.tostring(is); system.out.println(jsontxt); jsonobject json = new jsonobject(jsontxt); string = json.getstring("1000"); system.out.println(a); } } but i'm getting error in tostring() method. possible read .txt file containing json object local machine? if possible, how done? firstly: whenever ask question- add imports well. secondly: yes possible read .txt file containing json object. steps: 1. add maven dependency in pom.xml - <dependency> <groupid>com.googlecode.json-simple</groupid> <artifactid>json-simple</artifactid> <version>1.1.1</version> </dependency> or add jar of dependency. 2.import...
Read more