reflected_mustache 1.0.4

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Mustache templates - Reflected-Version

This is a clone of Greg Lowes mustace-package

This 'reflected'-package uses reflection instead of mirrors wich makes it Dart 2.x/Browser compatible


Live on
Source on GitHub

Mustache / Dart

A Dart library to parse and render mustache templates.

See the mustache manual for detailed usage information.

This library passes all mustache specification tests.

Example usage - browser

import 'dart:html' as dom;
import 'package:reflected_mustache/mustache.dart';

import 'main.reflectable.dart';

class Version {
    final int major;
    final int minor;

    Version(this.major, this.minor);

class DartLang {
    final String name;
    final Version version;
    final String message;

    DartLang(, this.version, this.message);

void main() {

    final Template template = new Template(
            Language: {{name}}<br>
            Version: {{version.major}}.{{version.minor}}<br>
            Comment: {{message}}
        """.trim(), lenient: false,htmlEscapeValues: false);
    final DartLang language = new DartLang("Dart",new Version(1,13),"Your Dart app is running.");

    final String content = template.renderString(language);
    final dom.Element child = new dom.Element.html(content);


      .removeWhere((final String selector) => selector == "loading");

Example usage - cmdline

import 'package:mustache/mustache.dart';

main() {
	var source = '''
	  {{# names }}
            <div>{{ lastname }}, {{ firstname }}</div>
	  {{/ names }}
	  {{^ names }}
	    <div>No names.</div>
	  {{/ names }}
	  {{! I am a comment. }}

	var template = new Template(source, name: 'template-filename.html');

	var output = template.renderString({'names': [
		{'firstname': 'Greg', 'lastname': 'Lowe'},
		{'firstname': 'Bob', 'lastname': 'Johnson'}


A template is parsed when it is created, after parsing it can be rendered any number of times with different values. A TemplateException is thrown if there is a problem parsing or rendering the template.

The Template contstructor allows passing a name, this name will be used in error messages. When working with a number of templates, it is important to pass a name so that the error messages specify which template caused the error.

By default all output from {{variable}} tags is html escaped, this behaviour can be changed by passing htmlEscapeValues : false to the Template constructor. You can also use a {{{triple mustache}}} tag, or a unescaped variable tag {{&unescaped}}, the output from these tags is not escaped.


This library uses reflection to get runtime type information. This means - no mirrors necessary

For more info check out the reflectable-package

Differences between strict mode and lenient mode.

Strict mode (default)

  • Tag names may only contain the characters a-z, A-Z, 0-9, underscore, period and minus. Other characters in tags will cause a TemplateException to be thrown during parsing.

  • During rendering, if no map key or object member which matches the tag name is found, then a TemplateException will be thrown.

Lenient mode

  • Tag names may use any characters.
  • During rendering, if no map key or object member which matches the tag name is found, then silently ignore and output nothing.

Nested paths

  var t = new Template('{{ }}');
  var output = template.renderString({'author': {'name': 'Greg Lowe'}});

Partials - example usage

var partial = new Template('{{ foo }}', name: 'partial');

var resolver = (String name) {
   if (name == 'partial-name') { // Name of partial tag.
     return partial;

var t = new Template('{{> partial-name }}', partialResolver: resolver);

var output = t.renderString({'foo': 'bar'}); // bar

Lambdas - example usage

var t = new Template('{{# foo }}');
var lambda = (_) => 'bar';
t.renderString({'foo': lambda}); // bar
var t = new Template('{{# foo }}hidden{{/ foo }}');
var lambda = (_) => 'shown'};
t.renderString({'foo': lambda); // shown
var t = new Template('{{# foo }}oi{{/ foo }}');
var lambda = (LambdaContext ctx) => '<b>${ctx.renderString().toUpperCase()}</b>';
t.renderString({'foo': lambda}); // <b>OI</b>
var t = new Template('{{# foo }}{{bar}}{{/ foo }}');
var lambda = (LambdaContext ctx) => '<b>${ctx.renderString().toUpperCase()}</b>';
t.renderString({'foo': lambda, 'bar': 'pub'}); // <b>PUB</b>
var t = new Template('{{# foo }}{{bar}}{{/ foo }}');
var lambda = (LambdaContext ctx) => '<b>${ctx.renderString().toUpperCase()}</b>';
t.renderString({'foo': lambda, 'bar': 'pub'}); // <b>PUB</b>

In the following example LambdaContext.renderSource(source) re-parses the source string in the current context, this is the default behaviour in many mustache implementations. Since re-parsing the content is slow, and often not required, this library makes this step optional.

var t = new Template('{{# foo }}{{bar}}{{/ foo }}');
var lambda = (LambdaContext ctx) => ctx.renderSource(ctx.source + ' {{cmd}}')};
t.renderString({'foo': lambda, 'bar': 'pub', 'cmd': 'build'}); // pub build

Change Log for reflected_mustache

Mustache template library



  • Works under Dart II and with reflectable 2.0.x 03b67f5



v1.0 - 2018-07-11


  • Mustache supports Key/Value pairs 7e8b1dd


v0.2 - 2018-07-05


  • Dart 2.x ready, works with reflectable ab012d3


This was generated with Changelog for Dart

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  reflected_mustache: ^1.0.4

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter packages get

Alternatively, your editor might support pub get or flutter packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:reflected_mustache/mustache.dart';
Version Uploaded Documentation Archive
1.0.4 Aug 28, 2018 Go to the documentation of reflected_mustache 1.0.4 Download reflected_mustache 1.0.4 archive
Describes how popular the package is relative to other packages. [more]
Code health derived from static analysis. [more]
Reflects how tidy and up-to-date the package is. [more]
Weighted score of the above. [more]
Learn more about scoring.

We analyzed this package on Sep 18, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0
  • pana: 0.12.3


Detected platforms: Flutter, web, other

No platform restriction found in libraries.


The description is too short.

Add more detail about the package, what it does and what is its target use case. Try to write at least 60 characters.

Format lib/mustache.dart.

Run dartfmt to format lib/mustache.dart.

Fix lib/src/lambda_context.dart.

Analysis of lib/src/lambda_context.dart reported 1 hint:

line 14 col 14: The value of the field '_isSection' isn't used.

Format lib/src/parser.dart.

Run dartfmt to format lib/src/parser.dart.

Format lib/src/renderer.dart.

Run dartfmt to format lib/src/renderer.dart.

Fix lib/src/scanner.dart.

Analysis of lib/src/scanner.dart reported 12 hints, including:

line 38 col 14: The value of the field '_lenient' isn't used.

line 357 col 11: The top level variable '_QUOTE' isn't used.

line 358 col 11: The top level variable '_APOS' isn't used.

line 363 col 11: The top level variable '_LT' isn't used.

line 371 col 11: The top level variable '_A' isn't used.

Maintain an example.

None of the files in your example/ directory matches a known example patterns. Common file name patterns include: main.dart, example.dart or you could also use reflected_mustache.dart.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0 <3.0.0
logging >=0.11.3 <1.0.0 0.11.3+2
reflectable ^2.0.0 2.0.7
Transitive dependencies
analyzer 0.32.5 0.33.0-alpha.0
args 1.5.0
async 2.0.8
build 0.12.7+3
build_config 0.3.1+2
build_resolvers 0.2.2+3
build_runner_core 0.3.1+5
built_collection 4.0.0
built_value 6.1.3
charcode 1.1.2
cli_util 0.1.3+2
code_builder 3.1.3
collection 1.14.11
convert 2.0.2
crypto 2.0.6
csslib 0.14.5
dart_style 1.1.3
fixnum 0.10.8
front_end 0.1.4+1 0.1.5
glob 1.1.7
graphs 0.1.2+1
html 0.13.3+3
http 0.11.3+17
http_multi_server 2.0.5
http_parser 3.1.3
io 0.3.3
js 0.6.1+1
json_annotation 1.1.0
kernel 0.3.4+1 0.3.5
matcher 0.12.4
meta 1.1.6
mime 0.9.6+2
package_config 1.0.5
package_resolver 1.0.4
path 1.6.2
pedantic 1.1.0
plugin 0.2.0+3
pool 1.3.6
pub_semver 1.4.2
pubspec_parse 0.1.2+2
quiver 2.0.0+1
shelf 0.7.3+3
shelf_web_socket 0.2.2+4
source_span 1.4.1
stack_trace 1.9.3
stream_channel 1.6.8
stream_transform 0.0.14+1
string_scanner 1.0.4
typed_data 1.1.6
utf 0.9.0+5
watcher 0.9.7+10
web_socket_channel 1.0.9
yaml 2.1.15
Dev dependencies
build_runner any 0.10.2
build_test any
build_web_compilers any
test any