Template action
A template action is a delimited instruction in a template that evaluates data, expressions, control flow, definitions, or function calls.
Learn Go with Pocket-Sized Projects
A template action is a delimited instruction in a template that evaluates data, control flow, definitions, or function calls.
- How it is used
- Uses delimited actions to generate structured output from data instead of cumbersome fmt.Sprintf or strings.Builder code.
- How deep it goes
- Explains parsing, execution, dot-based interpolation, field access, iteration, conditionals, and scoped contexts.
- Examples
- Demonstrates {{.}} in an HTML habits page and executes it with the value 5.
- What you can do after
- Apply it via Go templates to interpolate values and express conditionals, iteration, field access, and scoped output.
Read how Learn Go with Pocket-Sized Projects explains template action →
Go in Practice, Second Edition
A Go action is a command or data expression enclosed in double curly brackets within a Go template.
- How it is used
- Uses double-curly-bracket expressions to render, iterate, format, and control values in HTML templates.
- How deep it goes
- Explains field actions, range iteration, pipelines, custom functions, and context-aware escaping without detailing the complete action language.
- Examples
- Demonstrates title and content fields, comment iteration, URL escaping, HTML escaping, and custom date formatting.
- What you can do after
- Build HTML templates that render data, iterate collections, apply pipelines, and call registered Go formatting functions.
Read how Go in Practice, Second Edition explains template action →
Related concepts
- define actionincludes · A define action is a Go template action that declares a named template body terminated by an end action.
- templatepart of · A template is a reusable structure with fixed elements and variable parts for creating or generating similar content, outputs, or artifacts.
- pipelineuses · A pipeline is an ordered or coordinated sequence of connected processing stages or tasks that passes data, work, or results toward an outcome.
- template dotused by · The template dot is the Go template data-context expression representing the current value available to template actions.
- instructionkind of · An instruction is a directive that specifies an action, task, operation, constraint, or expected behavior for a person or computational system.
- compiler directivekind of · A compiler directive is a source-level instruction that controls compilation or directs related tooling without being an ordinary executable statement.
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