CODEWITHSUNDEEP
browsergwtversion-detection
Stevko
Stevko

Reputation: 4505

Browser version detect using GWT?

Is there GWT api that will tell me which browser version it detected?

I've found a flaw with IE7's regex handling and need to code around some tricky String.matches() expressions.

Upvotes: 27

Views: 21158

Answers (3)

Tapanayan Manna
Tapanayan Manna

Reputation: 99

If you are using the GXT library, you can use GXT.isChrome to detect chrome and you can find different data members of GXT class to detect a particular browser.

Upvotes: 7

Piotr
Piotr

Reputation: 5563

You could use GWT deferred binding using replacement and create two implementations of your class in which you use regex.

For example let's assume your class is named Parser and it contains code for all web browsers except for IE7. Then you can extend Parser and create ParserIE7 class for IE7. Then in your GWT module config file you can add:

<replace-with class="Parser">
  <when-type-is class="Parser"/>
</replace-with>

<replace-with class="ParserIE7">
  <when-type-is class="Parser" />
  <when-property-is name="user.agent" value="ie7"/>
</replace-with>

Then by calling 

Parser parser = GWT.create(Parser.class);

you should have a proper (web browser dependent) implementation of Parser in parser variable.

You can find more details here.

Upvotes: 27

Romain Hippeau
Romain Hippeau

Reputation: 24375

You can detect the browser type using the code below.

public static native String getUserAgent() /*-{
return navigator.userAgent.toLowerCase();
}-*/;

Then you can call that function and look at the type of the browser. For example the code below decides whether it is internet explorer or not.

if(getUserAgent().contains("msie"))
{
///////// Write your code for ie
}

This page has the User Agent for just about every browser known to man.

Upvotes: 28

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