Set the default value for disform. aspx and editform. aspx.

The default value here refers to external data, such as querystring,

1. Train of Thought. Javascript gets the value passed by querystring,

Of course, you can write it by yourself,

Provided by init. js under SharePoint layoutsGeturlkeyvalue

VaR action = geturlkeyvalue ('action ');

Helpful SharePoint JavaScript Functions

2. F12: Find the control of the field for which the default value is to be set,

In this case, the clientid may change,

Use JavaScript to obtain the control,

Gettagfromidentifierandtitle. The disadvantage is that you need to know the displayname of the field ......

Using JavaScript to manipulate a list form field

3. If you want to set the space to read-only, you need to set the attribute readonly = true instead of disable = true.

Why?

Difference between disable and readonly