How to load remote data into page field?

[Tengfei_Liu]

Hi, I am developing my plugin and have a question about the default value of the field.

There are many fields on the issue page, I want to load remote data as a default value into the field, which is provided by Jira or other plugins, when the issue page is opened.

For example:

The issue page has four fields

field1

field2

field3

field4

when the page is loaded complete, I want to execute my js and load data from the server, then fill the data into the field1.