handlebars-loader

2019-10-11 admin

handlebars-loader是什么

什么是handlebars-loader,handlebars loader module for webpack

handlebars-loader使用教程帮助文档

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handlebars-loader

A handlebars template loader for webpack.

Handlebars 4 now supported

Installation

npm i handlebars-loader --save

General Usage

webpack configuration

{
  ...
  module: {
    rules: [
      ...
      { test: /\.handlebars$/, loader: "handlebars-loader" }
    ]
  }
}

Your JS making use of the templates

var template = require("./file.handlebars");
// => returns file.handlebars content as a template function

Details

The loader resolves partials and helpers automatically. They are looked up relative to the current directory (this can be modified with the rootRelative option) or as a module if you prefix with $.

A file "/folder/file.handlebars".
{{> partial}} will reference "/folder/partial.handlebars".
{{> ../partial}} will reference "/partial.handlebars".
{{> $module/partial}} will reference "/folder/node_modules/module/partial.handlebars".
{{helper}} will reference the helper "/folder/helper.js" if this file exists.
{{[nested/helper] 'helper parameter'}} will reference the helper "/folder/nested/helper.js" if this file exists, passes 'helper parameter' as first parameter to helper.
{{../helper}} {{$module/helper}} are resolved similarly to partials.

The following query (or config) options are supported:

  • helperDirs: Defines additional directories to be searched for helpers. Allows helpers to be defined in a directory and used globally without relative paths. You must surround helpers in subdirectories with brackets (Handlerbar helper identifiers can’t have forward slashes without this). See example

  • runtime: Specify the path to the handlebars runtime library. Defaults to look under the local handlebars npm module, i.e. handlebars/runtime.

  • extensions: Searches for templates with alternate extensions. Defaults are .handlebars, .hbs, and ‘’ (no extension).

  • inlineRequires: Defines a regex that identifies strings within helper/partial parameters that should be replaced by inline require statements.

  • rootRelative: When automatically resolving partials and helpers, use an implied root path if none is present. Default = ./. Setting this to be empty effectively turns off automatically resolving relative handlebars resources for items like {{helper}}. {{./helper}} will still resolve as expected.

  • knownHelpers: Array of helpers that are registered at runtime and should not explicitly be required by webpack. This helps with interoperability for libraries like Thorax helpers.

  • exclude: Defines a regex that will exclude paths from resolving. This can be used to prevent helpers from being resolved to modules in the node_modules directory.

  • debug: Shows trace information to help debug issues (e.g. resolution of helpers).

  • partialDirs: Defines additional directories to be searched for partials. Allows partials to be defined in a directory and used globally without relative paths. See example

  • ignorePartials: Prevents partial references from being fetched and bundled. Useful for manually loading partials at runtime.

  • ignoreHelpers: Prevents helper references from being fetched and bundled. Useful for manually loading helpers at runtime.

  • precompileOptions: Options passed to handlebars precompile. See the Handlebars.js documentation for more information.

  • config: Tells the loader where to look in the webpack config for configurations for this loader. Defaults to handlebarsLoader.

  • config.partialResolver You can specify a function to use for resolving partials. To do so, add to your webpack config:

    handlebarsLoader: {
        partialResolver: function(partial, callback){
            // should pass the partial's path on disk
            // to the callback. Callback accepts (err, locationOnDisk)
        }
    }
    
  • config.helperResolver You can specify a function to use for resolving helpers. To do so, add to your webpack config:

    handlebarsLoader: {
        helperResolver: function(helper, callback){
            // should pass the helper's path on disk
            // to the callback if one was found for the given parameter.
            // Callback accepts (err, locationOnDisk)
            // Otherwise just call the callback without any arguments
        }
    }
    

See webpack documentation for more information regarding loaders.

Full examples

See the examples folder in this repo. The examples are fully runnable and demonstrate a number of concepts (using partials and helpers) – just run webpack in that directory to produce dist/bundle.js in the same folder, open index.html.

Change Log

See the CHANGELOG.md file.

License

MIT (http://www.opensource.org/licenses/mit-license)

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