Raw Go

gsx lets you embed arbitrary Go code inside a component body when you need to compute a local value, call a function for its side-effect, or otherwise run a Go statement that produces no markup output. The raw-Go form is the {{ stmt }} GoBlock — double braces signal "this is a Go statement, not an interpolation".

Note: single-brace { expr } is interpolation (it emits an escaped value into the output) — a different feature. See Interpolation for details.

GoBlock

A GoBlock runs a single Go statement inline without producing any HTML output. The most common use is assigning a local variable before interpolating it:

package views

component FullName(first string, last string) {
	<div>
		{{ full := first + " " + last }}
		<span>{ full }</span>
	</div>
}

Renders:

<div><span>Ada Lovelace</span></div>

▶ Open in Playground

A GoBlock can appear between elements or text nodes anywhere a child can appear. The statement is emitted verbatim into the generated Go and produces no HTML output; the assigned variable is available to all subsequent children in the same scope.

GoBlock vs ordered-attrs literal

The double-brace syntax appears in two distinct positions, and position alone disambiguates them:

Position	Syntax	Meaning
Body (between child nodes)	{{ full := x + y }}	GoBlock — a Go statement, no output
Attribute value	name={{ "key": value }}	Ordered-attrs literal — produces a gsx.Attrs (ordered slice)

When {{ … }} appears as a child of an element or at the top of a component body, it is always a GoBlock. When it appears after = as the value of an attribute, it is always an ordered-attrs literal producing a gsx.Attrs ordered slice that renders attributes in declaration order (useful for data-* directive ordering).

There is no ambiguity: the parser knows which context it is in before reading the {{.