Yes, you read correctly. The modern team sites got image renditions or at least predefined image formats that will be used by the responsive experience of modern team sites.
Back in the past image renditions was exclusively available in publishing sites only. Well, you were able to use them in team sites too, but the publishing features had to be enabled at site collection level. In addition, classic image renditions might cause negative performance impacts. This was first spotted and documented by Chris O┬┤Brien.
I guess this new feature doesn’t have much to do with the traditional image rendition and you are able to use it in your web part code too. For example, if you like to write a custom image gallery or develop a classic display template.
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Yo! SimpleStyle - Yeoman generator for you next Styl Guide

Last year I released a style guide generator for your SharePoint and Office 365 development.
This year I proudly present a yeoman generator that helps you to get started faster on your next project. There is no need to clone the old repository anymore. Simply create a new project as needed based on this template engine.
To be honest the old version of the Simple Style Guide is currently outdated and shouldn’t be used anymore.

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The new SharePoint Framework has a safety net when you develop and style your components. Whenever you write a new style sheet class this will be picked up by a SASS preprocessor that first compiles the SASS file and then applies a special random string to the class name.
This should theoretically avoid that two web parts have conflicting style sheet classes. If one web part uses the style sheet class ‘item’ and another web part uses the same class name. The last web part embedded on the page will win the battle how the item should look like. Through this renaming you make sure that every web part has an individual definition of the item. In general this is a good behavior.
On the other hand, you have frameworks or Office UI Fabric where those classes won’t be renamed.
There are also some negative impacts caused by that method and there is also an easy way to disable this renaming of style sheet classes. If you do so, then you need to be aware of certain things on how to make your styles available exclusively just for your web part.

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The SharePoint framework improved a lot during the last drops. I thought to myself what fancy sample can I build using the framework. During the Hackathon at the European SharePoint Conference we saw a lot of great uses of this new framework. One team was even able to add a framework web part to SharePoint 2007.
Actually, last weekend I came up with an idea. It was more a proof of concept I would like to try. I asked myself the question. Will I be able to drag and drop data between two individual web parts.
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spfx-update

With every new drop of the SharePoint Framework it seems that always the same procedure needs to be executed to update existing projects.
Luckily npm is capable of scripting. To be able to execute a script, it needs to be added to the ‘package.json’ file.
Open the ‘package.json’ and look out for the script section. To register the update script create a new entry “update-spfx” and chain all commands delimited by ampersand together.

*** Update 21.09.2016 for Drop 4 of SPFX use the following update-spfx command ***

Now you are ready to execute the following command

After all the steps have been finished, you are ready to go with your new drop of the new SharePoint Framework.
If you think it feels like hacking. Well, it is the normal way to handle such things in NodeJS.
For the next drop or a version of the SharePoint framework you just need to execute the script again. In case something have changed please check out the documentation or simply modify the update script to the changed requirements.

How it works

Like mentioned before you can chain all the commands together. The first part contains npm update. After the update you can specify all the node modules you like to update. You can simply add all packages right after the update and don’t need to update them individually.
You also don’t need to fumble around with the package versions the npm update command does this for you.
I this case we had three packages to update.

  • sp-client-base
  • sp-client-preview
  • sp-webpart-workbench

Right after the package name you see and additional @-sign. This defines to which version you like to update. ‘@latest’ indicates the latest version which actually is the version of the current drop. Luckily, there is only latest version with every new drop.
The next commands that needs to be executed are npm prune, followed by npm dedupe, followed by gulp nuke, followed by gulp.
In case you like to make sure you really rebuild your project can use gulp build. This will explicitly call a rebuild. The next update can come and you only need to execute npm run update-spfx again. Before you execute you should definitely check if something might have been changed.
In this case you can add or modify the commands.

Final hint – npm rebuild

The new SharePoint Framework contains a lot of binary components. Those components needs to be rebuilt / recompiled on your client first.
Sadly rebuild only happens when you install a package, but not during an update. The additional command that needs to be executed in this case is.

Optionally you can change this command to your npm update script too. In this case make sure that all those components are freshly built. Eve if not required it won’t hurt your installation.