Is it possible to modify the JSON options in html / template?

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3

html/template has a very convenient feature. If I have a template like this: 

<html>
...
<script>var x = '{{ .Data }}';</script>
...
</html>

The variable Data can be of any type, and html/template converts it to JSON. For example: 

<html>
...
<script>var x = '{"nombre":"José","edad":32}';</script>
...
</html>

My question is: Is it possible to use different options for the JSON format? I would like, for example, to use json.MarshalIndent() to make the template output easier to read.

    
asked by Flimzy 11.09.2016 в 20:52
source

2 answers

2

You can use Custom Template Functions ( custom template functions ) to give it the desired format.

  • We define the function marshalindent , which returns a template.JSStr (with valid escapes within a string of

    • answered by 13.09.2016 в 01:29
    1

    I do not know the go language, I had never seen it, but I can give an answer that I could develop by researching on the internet.

    Suppose this example, we have the following structure. 

    type keyvalue struct {Nombre, Edad string}

    With the following values. 

    x := []keyvalue{{"José", "32"}}

    In the following line you can see how I use MarshalIndent , put \t to tabulate. 

    json, _ := json.MarshalIndent(x, "", "\t")

    The result is indented as follows. 

    [
    {
        "Nombre": "José",
        "Edad": "32"
    }
]

    Final code.

    link 

    package main

import (
    "encoding/json"
    "html/template"
    "log"
    "os"
)

func main() {

    type keyvalue struct {
        Nombre, Edad string
    }
    x := []keyvalue{{"José", "32"}}
    tr, err := template.New("tr").Parse("{{.}}")
    if err != nil {
        log.Fatal(err)
    }
    json, _ := json.MarshalIndent(x, "", "\t")
    err = tr.ExecuteTemplate(os.Stdout, "tr", template.HTML(json))
}
        
    answered by 12.09.2016 в 12:27
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