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Thread: Migrating Extjs 4.1 to Extjs 6

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    Default Migrating Extjs 4.1 to Extjs 6

    HI,

    We already have an EXtjs application which is developed with version 4.1 . We need to migrate to latest version Extjs6.x

    What will be the possible or exact way to migrate?
    Do we need to migrate Extjs 4 to extjs 5 and then extjs 6?
    Any document/steps which help to do upgradation to Extjs 5 or Extjs6?

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    There are probably notes about this on the Sencha website. We did the same migration and it was fairly simple. How difficult it will be depends on your coding standards.

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    Where do i download Extjs 5.0.1 package ?

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    Honestly - just jump to the latest version. As long as your app is structured and organized according to Sencha's best practices and their conventions, you'll be okay.

    This was just recently asked here where you can see some other responses: https://www.sencha.com/forum/showthr...2-to-extjs-6-6

    Also, you download all versions of the framework where you downloaded your current version at - in the sencha support portal.

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    All Best
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    Oh yes, there was one area where we had to do busy-work/testing. Going from 4.2 to 6.6 there's a change in how it processes JSON. The property is Ext.USE_NATIVE_JSON which defaults to "true". This implies that it's using the browser parsing for JSON vs using low-level EXTJS code. In some cases your JSON parsing could fail unless you set it to false. We started with EXTJS 3, then moved to 4, then EXTJS 6. As such we weren't terribly disciplined in our JSON formatting from our server but the EXTJS code was forgiving, the browser default not so much.

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    I would also suggest upgrading right to the latest version instead of going to 5 first and then to 6.

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