lmmfy / goejs

write ejs in golang

goejs

provider a powerful template by using ejs in go interpreter. But you should very careful to using it in a high traffic business.

Usage

basic

// default
e := otto.NewDefaultOttoEngine()
got, _ := e.Exec("hello, <%= name %>!", map[string]interface{}{"name": "goejs"}, &contract.Option{
	Debug: true,
})
fmt.Println(got) // hello, goejs!

// config 
e := otto.NewOttoEngine(ejs.NewJsScript(ejs.WithOpenDelimiter("{"), ejs.WithOpenDelimiter("}")))
got, _ := e.Exec("hello, {%= name %}!", map[string]interface{}{"name": "goejs"}, &contract.Option{
	Debug: true,
})
fmt.Println(got) // hello, goejs!

advanced

1. keep json original

person := struct {
	Name string
	Age int
}{
	Name: "go-ejs",
	Age: 20,
}

e := otto.NewDefaultOttoEngine()
got, _ := e.Exec("person: <%- JSON.stringify(person) %>", map[string]interface{}{"person": person}, &contract.Option{
	Debug: true,
})
fmt.Println(got) // person: {"Age":20,"Name":"go-ejs"}

2. register js library

// lib.js
if (typeof sum == 'function') { 
	function sum(a, b) {
		return a + b;
	}
}

e := otto.NewOttoEngine(ejs.NewJsScript(ejs.WithOpenDelimiter("{"), ejs.WithOpenDelimiter("}")))
e.RegisterLibrary("./lib.js")
got, _ := e.Exec("{%= sum(1, 2) %}!", nil, nil)
fmt.Println(got) // 3

goja exists error, use otto first.

why use ejs

compare top js template engine on bestofjs, feature(call function in template) in ejs is most powerful.

feature

• keep most of the features of ejs(js version)
• support register js library

diff with ejs

• not support include, partials
• not use strict
• remove opts.scope
• remove opts.async
• remove opts.client
• remove opts.destructuredLocals

best Scene

• admin page
• config template
• dev tool

more ejs syntax

https://ejs.co/#docs

Thanks

• ejs
• otto