Golang：自定义模板功能“捕获”

I want to write template function like Smarty's capture.
How can I capture html inside

{{capture}}
    ...
{{/capture}}

How to do this?

You would do it in the application: Use a template for the HTML snippet you want to capture, render it, save it to a string and use it in subsequent template rendering.

{{define "T1"}}ONE{{end}}
{{define "T2"}}TWO{{end}}
{{define "T3"}}{{template "T1"}} {{template "T2"}}{{end}}
{{template "T3"}}

ONE TWO