Best practices to Write JavaScript for Project Online (Part 4)

Posted By Posted by: EPM Partners on June 27, 2017

Read input field values on a PDP 

Sometimes, in our script, we need to know the values of custom fields to render our own output. Case in point, I once had to draw cool d3.js based graphics representing project status based custom field values. See the sample output below:

Now I could have read the values from Project Odata endpoint /_api/ProjectData/Projects but the requirement was to update the graphics as soon as user changed those values. I’ll probably share some other key aspects of this script (rendering graphics and updating it when a user changes it) in a different future blog. The focus of this blog is the piece of code that I wrote to read input field values.

The input field values are displayed as editable input boxes if a project is in edit mode. As shown in the screenshot above.

In non-edit mode, the fields are displayed as simple text values inside a DIV tag which in turn resides inside a TD tag. However, even in edit mode, there are cases where fields would be displayed as simple text, e.g. when a field is a calculated field or it is locked in the current workflow stage etc. see output of non-edit mode below:

The importance of the code that I’m going to share are as follows:
  1. The code is in TypeScript but could easily be transformed to JavaScript. I highly recommend using TypeScript for any medium and large sized scripting apps.
  2. It depends on JQuery
  3. If in future, Microsoft changes the HTML Dom structure of a PDP page, the code will likely break and will require an update.

Without further ado, following is the code to read Number, Date & Text values from PDP in both edit and non-edit mode. This code can be downloaded from

Blog Posted In Blog Posted In: Blog, How to, Project Online
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