SharePoint form context for list item from js – WPQ2FormCtx

SharePoint 2013 provides useful javascript object called WPQ2FormCtx. That object holds information about List, List Item, DisplayForm, ViewForm, EditForm and NewForm.

For example, list information:

ListData:

As you can see, there is information about ItemAttributes, ItemContentTypeId, ItemContentTypeName and others.

Task from life:

Override postback action in edit/new form, check condition and submit form:

As you can see, on line

using object WPQ2FormCtx for getting listitem field value.

Postback attaches due presave action:

javascript sharepoint