An HTML templating language for Go that has great developer tooling.

Note: This is a fork of a-h/templ adapted for Go 1.24

The go1.24 branch downgrades the Go version requirement from 1.25 to 1.24 and fixes related compatibility issues.

Documentation

See user documentation at https://templ.guide

Go 1.24 Version Usage

Installation

International (GitHub):

go get github.com/tekintian/templ@go1.24

China Mainland (Gitee - faster access):

go get gitee.com/tekintian/templ@go1.24

Or use replace in your go.mod:

require github.com/a-h/templ v0.3.833

// International
replace github.com/a-h/templ => github.com/tekintian/templ go1.24

// China Mainland
replace github.com/a-h/templ => gitee.com/tekintian/templ go1.24

Compatibility Changes

This branch makes the following modifications to support Go 1.24:

1. Go version downgrade: go 1.25.0 → go 1.24.0
2. Dependency downgrade: golang.org/x/* packages downgraded to Go 1.24 compatible versions
3. Syntax fixes:
   • sync.WaitGroup.Go() (Go 1.25+) → traditional go func() + wg.Add/Done
   • for range N (Go 1.25+) → for i := 0; i < N; i++

Branch Information

Branch	Go Version	Description
main	1.25+	Upstream original version
go1.24	1.24+	This branch, Go 1.24 compatible version

Tasks

version-set

Set the version of templ to the current version.

version set --template="0.3.%d"

build

Build a local version.

version set --template="0.3.%d"
cd cmd/templ
go build

install-snapshot

Build and install current version.

# Remove templ from the non-standard ~/bin/templ path
# that this command previously used.
rm -f ~/bin/templ
# Clear LSP logs.
rm -f cmd/templ/lspcmd/*.txt
# Update version.
version set --template="0.3.%d"
# Install to $GOPATH/bin or $HOME/go/bin
cd cmd/templ && go install

build-snapshot

Use goreleaser to build the command line binary using goreleaser.

goreleaser build --snapshot --clean

generate

Run templ generate using local version.

go run ./cmd/templ generate -include-version=false

test

Run Go tests.

version set --template="0.3.%d"
go run ./cmd/templ generate -include-version=false
go test ./...

test-short

Run Go tests.

version set --template="0.3.%d"
go run ./cmd/templ generate -include-version=false
go test ./... -short

test-cover

Run Go tests.

# Create test profile directories.
mkdir -p coverage/fmt
mkdir -p coverage/generate
mkdir -p coverage/version
mkdir -p coverage/unit
# Build the test binary.
go build -cover -o ./coverage/templ-cover ./cmd/templ
# Run the covered generate command.
GOCOVERDIR=coverage/fmt ./coverage/templ-cover fmt .
GOCOVERDIR=coverage/generate ./coverage/templ-cover generate -include-version=false
GOCOVERDIR=coverage/version ./coverage/templ-cover version
# Run the unit tests.
go test -cover ./... -coverpkg ./... -args -test.gocoverdir="$PWD/coverage/unit"
# Display the combined percentage.
go tool covdata percent -i=./coverage/fmt,./coverage/generate,./coverage/version,./coverage/unit
# Generate a text coverage profile for tooling to use.
go tool covdata textfmt -i=./coverage/fmt,./coverage/generate,./coverage/version,./coverage/unit -o coverage.out
# Print total
go tool cover -func coverage.out | grep total

test-cover-watch

interactive: true

gotestsum --watch -- -coverprofile=coverage.out

test-fuzz

./parser/v2/fuzz.sh
./parser/v2/goexpression/fuzz.sh

benchmark

Run benchmarks.

go run ./cmd/templ generate -include-version=false && go test ./... -bench=. -benchmem

fmt

Format all Go and templ code.

gofmt -s -w .
go run ./cmd/templ fmt .

lint

Run the lint operations that are run as part of the CI.

golangci-lint run --verbose

ensure-generated

Ensure that templ files have been generated with the local version of templ, and that those files have been added to git.

Requires: generate

git diff --exit-code

push-release-tag

Push a semantic version number to GitHub to trigger the release process.

version push --template="0.3.%d" --prefix="v"

docs-run

Run the development server.

Directory: docs

npm run start

docs-build

Build production docs site.

Directory: docs

npm run build