@jaredwray/fumanchu NPM

fumanchu

Handlebars + Helpers Together

Handlebars + Handlebars-helpers (helpers are now maintained in this project) combined into a single package. Easily use in your nodejs as it is a drop in replacement when using handlebars directly.

We plan to make significant changes over time with this project such as the following:

(Completed) Remove all dependencies on handlebars-helpers and maintain all helpers in this project
(In Progress) Migrate to Typescript with full typing support
(In Progress) Replace module dependencies that are no longer supported with supported ones
Migration to ESM and CJS support using cross compatible code
Migration to vitest as a testing framework
Migration to xo as a linting framework
Move to better documentation and examples where it makes sense
Add in browser support via CDN (this will remove the nodejs specific helpers)

Breaking Changes from v2 to v3

Because of the complexity in the legacy helpers library we have moved to exporting the libraries and a helper function to make it easier to use. Here are the exports:

handlebars - This is an instance of handlebars library without any helpers. It is the same as calling Handlebars.create()
helpers - This is a function that takes an object with a handlebars key and adds all the helpers to the handlebars instance. This is the same as calling helpers({ handlebars: handlebars })
createHandlebars - This is an async function that returns a handlebars instance with all the helpers added. This is the same as calling helpers({ handlebars: handlebars }) but async.
Handlebars - This is the handlebars library itself. It is the same as calling require('handlebars')

Please see the examples below for how to use the library.

Usage Nodejs

npm install @jaredwray/fumanchu --save

var {handlebars, helpers} = require('@jaredwray/fumanchu');
helpers({ handlebars: handlebars });
var template = handlebars.compile('{{#if (eq foo "bar")}}<p>Foo is bar</p>{{/if}}');
var html = template({foo: 'bar'});
console.log(html);

If using it with es6 you can access handlebars and helpers:

import {handlebars, helpers} from '@jaredwray/fumanchu';
helpers({ handlebars: handlebars });
const template = handlebars.compile('{{#if (eq foo "bar")}}<p>Foo is bar</p>{{/if}}');
const html = template({foo: 'bar'});
console.log(html);

If you want to just get an instance of handlebars via createHandlebars you can do the following (it is async):

import {createHandlebars} from '@jaredwray/fumanchu';
const handlebars = await createHandlebars(); //this will return a handlebars instance with all helpers
const template = handlebars.compile('{{#if (eq foo "bar")}}<p>Foo is bar</p>{{/if}}');
const html = template({foo: 'bar'});
console.log(html); // <p>Foo is bar</p>

It's just that easy! No need to add Handlebars to your project, it's already included.

Using Handlebars Helpers

If you only want to use handlebar helpers you can easily do that by doing the following:

var {helpers} = require('@jaredwray/fumanchu');
var handlebars = require('handlebars');
helpers({ handlebars: handlebars });
var fn = handlebars.compile('{{add value 5}}');
console.log(fn); // 10

If using it with es6 you can access helpers via destructuring:

import {helpers} from '@jaredwray/fumanchu';
import handlebars from 'handlebars';
helpers({ handlebars: handlebars });
const template = handlebars.compile('{{#if (eq foo "bar")}}<p>Foo is bar</p>{{/if}}');
const html = template({foo: 'bar'});
console.log(html); // <p>Foo is bar</p>

Helpers

More than 180 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

All helpers

array

Returns all of the items in an array after the specified index. Opposite of before.

Params

array {Array}: Collection
n {Number}: Starting index (number of items to exclude)
returns {Array}: Array exluding n items.

Example

<!-- array: ['a', 'b', 'c'] -->
{{after array 1}}
<!-- results in: '["c"]' -->

Cast the given value to an array.

Params

value {any}
returns {Array}

Example

{{arrayify "foo"}}
<!-- results in: [ "foo" ] -->

Return all of the items in the collection before the specified count. Opposite of after.

Params

array {Array}
n {Number}
returns {Array}: Array excluding items after the given number.

Example

<!-- array: ['a', 'b', 'c'] -->
{{before array 2}}
<!-- results in: '["a", "b"]' -->

Params

array {Array}
options {Object}
returns {String}

Example

<!-- array: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'] -->
{{#eachIndex array}}
  {{item}} is {{index}}
{{/eachIndex}}

Block helper that filters the given array and renders the block for values that evaluate to true, otherwise the inverse block is returned.

Params

array {Array}
value {any}
options {Object}
returns {String}

Example

<!-- array: ['a', 'b', 'c'] -->
{{#filter array "foo"}}AAA{{else}}BBB{{/filter}}
<!-- results in: 'BBB' -->

Returns the first item, or first n items of an array.

Params

array {Array}
n {Number}: Number of items to return, starting at 0.
returns {Array}

Example

{{first "['a', 'b', 'c', 'd', 'e']" 2}}
<!-- results in: '["a", "b"]' -->

Iterates over each item in an array and exposes the current item in the array as context to the inner block. In addition to the current array item, the helper exposes the following variables to the inner block:

index
total
isFirst
isLast Also, @index is exposed as a private variable, and additional private variables may be defined as hash arguments.

Params

array {Array}
returns {String}

Example

<!-- accounts = [
{'name': 'John', 'email': 'john@example.com'},
{'name': 'Malcolm', 'email': 'malcolm@example.com'},
{'name': 'David', 'email': 'david@example.com'}
] -->

{{#forEach accounts}}
  <a href="mailto:{{ email }}" title="Send an email to {{ name }}">
    {{ name }}
  </a>{{#unless isLast}}, {{/unless}}
{{/forEach}}

Block helper that renders the block if an array has the given value. Optionally specify an inverse block to render when the array does not have the given value.

Params

array {Array}
value {any}
options {Object}
returns {String}

Example

<!-- array: ['a', 'b', 'c'] -->
{{#inArray array "d"}}
  foo
{{else}}
  bar
{{/inArray}}
<!-- results in: 'bar' -->

Returns true if value is an es5 array.

Params

value {any}: The value to test.
returns {Boolean}

Example

{{isArray "abc"}}
<!-- results in: false -->

<!-- array: [1, 2, 3] -->
{{isArray array}}
<!-- results in: true -->

Returns the item from array at index idx.

Params

array {Array}
idx {Number}
returns {any} value

Example

<!-- array: ['a', 'b', 'c'] -->
{{itemAt array 1}}
<!-- results in: 'b' -->

Join all elements of array into a string, optionally using a given separator.

Params

array {Array}
separator {String}: The separator to use. Defaults to ,.
returns {String}

Example

<!-- array: ['a', 'b', 'c'] -->
{{join array}}
<!-- results in: 'a, b, c' -->

{{join array '-'}}
<!-- results in: 'a-b-c' -->

Returns true if the the length of the given value is equal to the given length. Can be used as a block or inline helper.

Params

value {Array|String}
length {Number}
options {Object}
returns {String}

Returns the last item, or last n items of an array or string. Opposite of first.

Params

value {Array|String}: Array or string.
n {Number}: Number of items to return from the end of the array.
returns {Array}

Example

<!-- var value = ['a', 'b', 'c', 'd', 'e'] -->

{{last value}}
<!-- results in: ['e'] -->

{{last value 2}}
<!-- results in: ['d', 'e'] -->

{{last value 3}}
<!-- results in: ['c', 'd', 'e'] -->

Returns the length of the given string or array.

Params

value {Array|Object|String}
returns {Number}: The length of the value.

Example

{{length '["a", "b", "c"]'}}
<!-- results in: 3 -->

<!-- results in: myArray = ['a', 'b', 'c', 'd', 'e']; -->
{{length myArray}}
<!-- results in: 5 -->

<!-- results in: myObject = {'a': 'a', 'b': 'b'}; -->
{{length myObject}}
<!-- results in: 2 -->

Alias for equalsLength

Returns a new array, created by calling function on each element of the given array. For example,

Params

array {Array}
fn {Function}
returns {String}

Example

<!-- array: ['a', 'b', 'c'], and "double" is a
fictitious function that duplicates letters -->
{{map array double}}
<!-- results in: '["aa", "bb", "cc"]' -->

Map over the given object or array or objects and create an array of values from the given prop. Dot-notation may be used (as a string) to get nested properties.

Params

collection {Array|Object}
prop {Function}
returns {String}

Example

// {{pluck items "data.title"}}
<!-- results in: '["aa", "bb", "cc"]' -->

Reverse the elements in an array, or the characters in a string.

Params

value {Array|String}
returns {Array|String}: Returns the reversed string or array.

Example

<!-- value: 'abcd' -->
{{reverse value}}
<!-- results in: 'dcba' -->
<!-- value: ['a', 'b', 'c', 'd'] -->
{{reverse value}}
<!-- results in: ['d', 'c', 'b', 'a'] -->

Block helper that returns the block if the callback returns true for some value in the given array.

Params

array {Array}
iter {Function}: Iteratee
{Options}: Handlebars provided options object
returns {String}

Example

<!-- array: [1, 'b', 3] -->
{{#some array isString}}
  Render me if the array has a string.
{{else}}
  Render me if it doesn't.
{{/some}}
<!-- results in: 'Render me if the array has a string.' -->

Sort the given array. If an array of objects is passed, you may optionally pass a key to sort on as the second argument. You may alternatively pass a sorting function as the second argument.

Params

array {Array}: the array to sort.
key {String|Function}: The object key to sort by, or sorting function.

Example

<!-- array: ['b', 'a', 'c'] -->
{{sort array}}
<!-- results in: '["a", "b", "c"]' -->

Sort an array. If an array of objects is passed, you may optionally pass a key to sort on as the second argument. You may alternatively pass a sorting function as the second argument.

Params

array {Array}: the array to sort.
props {String|Function}: One or more properties to sort by, or sorting functions to use.

Example

<!-- array: [{a: 'zzz'}, {a: 'aaa'}] -->
{{sortBy array "a"}}
<!-- results in: '[{"a":"aaa"}, {"a":"zzz"}]' -->

Use the items in the array after the specified index as context inside a block. Opposite of withBefore.

Params

array {Array}
idx {Number}
options {Object}
returns {Array}

Example

<!-- array: ['a', 'b', 'c', 'd', 'e'] -->
{{#withAfter array 3}}
  {{this}}
{{/withAfter}}
<!-- results in: "de" -->

Use the items in the array before the specified index as context inside a block. Opposite of withAfter.

Params

array {Array}
idx {Number}
options {Object}
returns {Array}

Example

<!-- array: ['a', 'b', 'c', 'd', 'e'] -->
{{#withBefore array 3}}
  {{this}}
{{/withBefore}}
<!-- results in: 'ab' -->

Use the first item in a collection inside a handlebars block expression. Opposite of withLast.

Params

array {Array}
idx {Number}
options {Object}
returns {String}

Example

<!-- array: ['a', 'b', 'c'] -->
{{#withFirst array}}
  {{this}}
{{/withFirst}}
<!-- results in: 'a' -->

Block helper that groups array elements by given group size.

Params

array {Array}: The array to iterate over
size {Number}: The desired length of each array "group"
options {Object}: Handlebars options
returns {String}

Example

<!-- array: ['a','b','c','d','e','f','g','h'] -->
{{#withGroup array 4}}
  {{#each this}}
    {{.}}
  {{each}}
  <br>
{{/withGroup}}
<!-- results in: -->
<!-- 'a','b','c','d'<br> -->
<!-- 'e','f','g','h'<br> -->

Use the last item or n items in an array as context inside a block. Opposite of withFirst.

Params

array {Array}
idx {Number}: The starting index.
options {Object}
returns {String}

Example

<!-- array: ['a', 'b', 'c'] -->
{{#withLast array}}
  {{this}}
{{/withLast}}
<!-- results in: 'c' -->

Block helper that sorts a collection and exposes the sorted collection as context inside the block.

Params

array {Array}
prop {String}
options {Object}: Specify reverse="true" to reverse the array.
returns {String}

Example

<!-- array: ['b', 'a', 'c'] -->
{{#withSort array}}{{this}}{{/withSort}}
<!-- results in: 'abc' -->

Block helper that return an array with all duplicate values removed. Best used along with a each helper.

Params

array {Array}
options {Object}
returns {Array}

Example

<!-- array: ['a', 'a', 'c', 'b', 'e', 'e'] -->
{{#each (unique array)}}{{.}}{{/each}}
<!-- results in: 'acbe' -->

Embed code from an external file as preformatted text.

Params

filepath {String}: filepath to the file to embed.
language {String}: Optionally specify the language to use for syntax highlighting.
returns {String}

Example

{{embed 'path/to/file.js'}}
<!-- optionally specify the language to use -->
{{embed 'path/to/file.hbs' 'html')}}

Embed a GitHub Gist using only the id of the Gist

Params

id {String}
returns {String}

Example

{{gist "12345"}}

Generate the HTML for a jsFiddle link with the given params

Params

params {Object}
returns {String}

Example

{{jsfiddle id="0dfk10ks" tabs="true"}}

collection

Inline, subexpression, or block helper that returns true (or the block) if the given collection is empty, or false (or the inverse block, if supplied) if the colleciton is not empty.

Params

collection {Object}
options {Object}
returns {String}

Example

<!-- array: [] -->
{{#isEmpty array}}AAA{{else}}BBB{{/isEmpty}}
<!-- results in: 'AAA' -->

<!-- array: [] -->
{{isEmpty array}}
<!-- results in: true -->

Block helper that iterates over an array or object. If an array is given, .forEach is called, or if an object is given, .forOwn is called, otherwise the inverse block is returned.

Params

collection {Object|Array}: The collection to iterate over
options {Object}
returns {String}

comparison

Helper that renders the block if both of the given values are truthy. If an inverse block is specified it will be rendered when falsy. Works as a block helper, inline helper or subexpression.

Params

a {any}
b {any}
options {Object}: Handlebars provided options object
returns {String}

Example

<!-- {great: true, magnificent: true} -->
{{#and great magnificent}}A{{else}}B{{/and}}
<!-- results in: 'A' -->

Render a block when a comparison of the first and third arguments returns true. The second argument is the arithemetic operator to use. You may also optionally specify an inverse block to render when falsy.

Params

a {}
operator {}: The operator to use. Operators must be enclosed in quotes: ">", "=", "<=", and so on.
b {}
options {Object}: Handlebars provided options object
returns {String}: Block, or if specified the inverse block is rendered if falsey.

Block helper that renders the block if collection has the given value, using strict equality (===) for comparison, otherwise the inverse block is rendered (if specified). If a startIndex is specified and is negative, it is used as the offset from the end of the collection.

Params

collection {Array|Object|String}: The collection to iterate over.
value {any}: The value to check for.
[startIndex=0] {Number}: Optionally define the starting index.
options {Object}: Handlebars provided options object.

Example

<!-- array = ['a', 'b', 'c'] -->
{{#contains array "d"}}
  This will not be rendered.
{{else}}
  This will be rendered.
{{/contains}}

`{{default}}`

Returns the first value that is not undefined, otherwise the default value is returned.

Params

value {any}
defaultValue {any}
returns {String}

Block helper that renders a block if a is equal to b. If an inverse block is specified it will be rendered when falsy. You may optionally use the compare="" hash argument for the second value.

Params

a {String}
b {String}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Block helper that renders a block if a is greater than b.

If an inverse block is specified it will be rendered when falsy. You may optionally use the compare="" hash argument for the second value.

Params

a {String}
b {String}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Block helper that renders a block if a is greater than or equal to b.

If an inverse block is specified it will be rendered when falsy. You may optionally use the compare="" hash argument for the second value.

Params

a {String}
b {String}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Block helper that renders a block if value has pattern. If an inverse block is specified it will be rendered when falsy.

Params

val {any}: The value to check.
pattern {any}: The pattern to check for.
options {Object}: Handlebars provided options object
returns {String}

Returns true if the given value is falsey. Uses the falsey library for comparisons. Please see that library for more information or to report bugs with this helper.

Params

val {any}
options {Options}
returns {Boolean}

Returns true if the given value is truthy. Uses the falsey library for comparisons. Please see that library for more information or to report bugs with this helper.

Params

val {any}
options {Options}
returns {Boolean}

Return true if the given value is an even number.

Params

number {Number}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Example

{{#ifEven value}}
  render A
{{else}}
  render B
{{/ifEven}}

Conditionally renders a block if the remainder is zero when a operand is divided by b. If an inverse block is specified it will be rendered when the remainder is not zero.

Params

{}: {Number}
{}: {Number}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Block helper that renders a block if value is an odd number. If an inverse block is specified it will be rendered when falsy.

Params

value {Object}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Example

{{#ifOdd value}}
  render A
{{else}}
  render B
{{/ifOdd}}

`{{is}}`

Block helper that renders a block if a is equal to b. If an inverse block is specified it will be rendered when falsy. Similar to eq but does not do strict equality.

Params

a {any}
b {any}
options {Object}: Handlebars provided options object
returns {String}

`{{isnt}}`

Block helper that renders a block if a is not equal to b. If an inverse block is specified it will be rendered when falsy. Similar to unlessEq but does not use strict equality for comparisons.

Params

a {String}
b {String}
options {Object}: Handlebars provided options object
returns {String}

`{{lt}}`

Block helper that renders a block if a is less than b.

If an inverse block is specified it will be rendered when falsy. You may optionally use the compare="" hash argument for the second value.

Params

context {Object}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

`{{lte}}`

Block helper that renders a block if a is less than or equal to b.

If an inverse block is specified it will be rendered when falsy. You may optionally use the compare="" hash argument for the second value.

Params

a {Sring}
b {Sring}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

`{{neither}}`

Block helper that renders a block if neither of the given values are truthy. If an inverse block is specified it will be rendered when falsy.

Params

a {any}
b {any}
options {}: Handlebars options object
returns {String}: Block, or inverse block if specified and falsey.

`{{not}}`

Returns true if val is falsey. Works as a block or inline helper.

Params

val {String}
options {Object}: Handlebars provided options object
returns {String}

`{{or}}`

Block helper that renders a block if any of the given values is truthy. If an inverse block is specified it will be rendered when falsy.

Params

args {any}: Variable number of arguments
options {Object}: Handlebars options object
returns {String}: Block, or inverse block if specified and falsey.

Example

{{#or a b c}}
  If any value is true this will be rendered.
{{/or}}

Block helper that always renders the inverse block unless a is is equal to b.

Params

a {String}
b {String}
options {Object}: Handlebars provided options object
returns {String}: Inverse block by default, or block if falsey.

Block helper that always renders the inverse block unless a is is greater than b.

Params

a {Object}: The default value
b {Object}: The value to compare
options {Object}: Handlebars provided options object
returns {String}: Inverse block by default, or block if falsey.

Block helper that always renders the inverse block unless a is is less than b.

Params

a {Object}: The default value
b {Object}: The value to compare
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Block helper that always renders the inverse block unless a is is greater than or equal to b.

Params

a {any}
b {any}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

Block helper that always renders the inverse block unless a is is less than or equal to b.

Params

a {any}
b {any}
options {Object}: Handlebars provided options object
returns {String}: Block, or inverse block if specified and falsey.

date

Get the current year.

Example

{{year}}
<!-- 2017 -->

Use moment as a helper. See helper-date for more details.

fs

Read a file from the file system. This is useful in composing "include"-style helpers using sub-expressions.

Params

filepath {String}
returns {String}

Example

{{read "a/b/c.js"}}
{{someHelper (read "a/b/c.md")}}

Return an array of files from the given directory.

Params

directory {String}
returns {Array}

html

Stringify attributes on the options hash.

Params

options {Object}
returns {String}

Example

<!-- value = 'bar' -->
<div{{attr foo=value}}></div>
<!-- results in: <div foo="bar"></div>

Add an array of <link> tags. Automatically resolves relative paths to options.assets if passed on the context.

Params

list {String|Array}: One or more stylesheet urls.
returns {String}

Example

<!-- {stylesheets: ['foo.css', 'bar.css']} -->
{{css stylesheets}}

<!-- results in: -->
<!-- <link type="text/css" rel="stylesheet" href="foo.css"> -->
<!-- <link type="text/css" rel="stylesheet" href="bar.css"> -->

Generate one or more <script></script> tags with paths/urls to javascript or coffeescript files.

Params

context {Object}
returns {String}

Example

{{js scripts}}

Strip HTML tags from a string, so that only the text nodes are preserved.

Params

str {String}: The string of HTML to sanitize.
returns {String}

Example

{{sanitize "<span>foo</span>"}}
<!-- results in: 'foo' -->

Block helper for creating unordered lists (<ul></ul>)

Params

context {Object}
options {Object}
returns {String}

Block helper for creating ordered lists (<ol></ol>)

Params

context {Object}
options {Object}
returns {String}

Returns a <figure> with a thumbnail linked to a full picture

Params

context {Object}: Object with values/attributes to add to the generated elements:
context.alt {String}
context.src {String}
context.width {Number}
context.height {Number}
returns {String}: HTML <figure> element with image and optional caption/link.

i18n

i18n helper. See button-i18n for a working example.

Params

key {String}
options {Object}
returns {String}

inflection

Returns either the singular or plural inflection of a word based on the given count.

Params

count {Number}
singular {String}: The singular form
plural {String}: The plural form
includeCount {String}
returns {String}

Example

{{inflect 0 "string" "strings"}}
<!-- "strings" -->
{{inflect 1 "string" "strings"}}
<!-- "string" -->
{{inflect 1 "string" "strings" true}}
<!-- "1 string" -->
{{inflect 2 "string" "strings"}}
<!-- "strings" -->
{{inflect 2 "string" "strings" true}}
<!-- "2 strings" -->

Returns an ordinalized number as a string.

Params

val {String}: The value to ordinalize.
returns {String}: The ordinalized number

Example

{{ordinalize 1}}
<!-- '1st' -->
{{ordinalize 21}}
<!-- '21st' -->
{{ordinalize 29}}
<!-- '29th' -->
{{ordinalize 22}}
<!-- '22nd' -->

logging

logging-helpers.

markdown

Block helper that converts a string of inline markdown to HTML.

Params

context {Object}
options {Object}
returns {String}

Example

{{#markdown}}
# Foo
{{/markdown}}
<!-- results in: <h1>Foo</h1> -->

Read a markdown file from the file system and inject its contents after converting it to HTML.

Params

context {Object}
options {Object}
returns {String}

Example

{{md "foo/bar.md"}}

match

Returns an array of strings that match the given glob pattern(s). Options may be passed on the options hash or locals.

Params

files {Array|String}
patterns {Array|String}: One or more glob patterns.
locals {Object}
options {Object}
returns {Array}: Array of matches

Example

{{match (readdir "foo") "*.js"}}
{{match (readdir "foo") (toRegex "\\.js$")}}

Returns true if a filepath contains the given pattern. Options may be passed on the options hash or locals.

Params

filepath {String}
pattern {String}
options {Object}
returns {Boolean}

Example

{{isMatch "foo.md" "*.md"}}
<!-- results in: true -->

math

Return the magnitude of a.

Params

a {Number}
returns {Number}

Return the sum of a plus b.

Params

a {Number}
b {Number}
returns {Number}

Returns the average of all numbers in the given array.

Params

array {Array}: Array of numbers to add up.
returns {Number}

Example

{{avg "[1, 2, 3, 4, 5]"}}
<!-- results in: '3' -->

Get the Math.ceil() of the given value.

Params

value {Number}
returns {Number}

Divide a by b

Params

a {Number}: numerator
b {Number}: denominator

Get the Math.floor() of the given value.

Params

value {Number}
returns {Number}

Return the difference of a minus b.

Params

a {Number}
b {Number}

Get the remainder of a division operation.

Params

a {Number}
b {Number}
returns {Number}

Return the product of a times b.

Params

a {Number}: factor
b {Number}: multiplier
returns {Number}

Add a by b.

Params

a {Number}: factor
b {Number}: multiplier

Generate a random number between two values

Params

min {Number}
max {Number}
returns {String}

Get the remainder when a is divided by b.

Params

a {Number}: a
b {Number}: b

Round the given number.

Params

number {Number}
returns {Number}

Return the product of a minus b.

Params

a {Number}
b {Number}
returns {Number}

Returns the sum of all numbers in the given array.

Params

array {Array}: Array of numbers to add up.
returns {Number}

Example

{{sum "[1, 2, 3, 4, 5]"}}
<!-- results in: '15' -->

Multiply number a by number b.

Params

a {Number}: factor
b {Number}: multiplier
returns {Number}

misc

Return the given value of prop from this.options.

Params

prop {String}
returns {any}

Example

<!-- context = {options: {a: {b: {c: 'ddd'}}}} -->
{{option "a.b.c"}}
<!-- results => `ddd` -->

Block helper that renders the block without taking any arguments.

Params

options {Object}
returns {String}

Get the native type of the given value

Params

value {any}
returns {String}: Returns the type of value.

Example

{{typeOf 1}}
//=> 'number'
{{typeOf "1"}}
//=> 'string'
{{typeOf "foo"}}
//=> 'string'

Block helper that builds the context for the block from the options hash.

Params

options {Object}: Handlebars provided options object.

number

Format a number to it's equivalent in bytes. If a string is passed, it's length will be formatted and returned.

Examples:

'foo' => 3 B
13661855 => 13.66 MB
825399 => 825.39 kB
1396 => 1.4 kB

Params

number {Number|String}
returns {String}

Add commas to numbers

Params

num {Number}
returns {Number}

Convert a string or number to a formatted phone number.

Params

num {Number|String}: The phone number to format, e.g. 8005551212
returns {Number}: Formatted phone number: (800) 555-1212

Abbreviate numbers to the given number of precision. This is for general numbers, not size in bytes.

Params

number {Number}
precision {Number}
returns {String}

Returns a string representing the given number in exponential notation.

Params

number {Number}
fractionDigits {Number}: Optional. An integer specifying the number of digits to use after the decimal point. Defaults to as many digits as necessary to specify the number.
returns {Number}

Example

{{toExponential number digits}};

Formats the given number using fixed-point notation.

Params

number {Number}
digits {Number}: (Optional) The number of digits to appear after the decimal point; this may be a value between 0 and 20. If this argument is omitted, it is treated as 0.
returns {String}: A string representing the given number using fixed-point notation.

Example

{{toFixed "1.1234" 2}}
//=> '1.12'

Params

number {Number}
returns {Number}

Params

number {Number}
returns {Number}

Returns a string representing the Number object to the specified precision.

Params

number {Number}
precision {Number}: (Optional) An integer specifying the number of significant digits. If precison is not between 1 and 100 (inclusive), it will be coerced to 0.
returns {String}: A string representing a Number object in fixed-point or exponential notation rounded to precision significant digits.

Example

{{toPrecision "1.1234" 2}}
//=> '1.1'

object

Extend the context with the properties of other objects. A shallow merge is performed to avoid mutating the context.

Params

objects {Object}: One or more objects to extend.
returns {Object}

Block helper that iterates over the properties of an object, exposing each key and value on the context.

Params

context {Object}
options {Object}
returns {String}

Block helper that iterates over the own properties of an object, exposing each key and value on the context.

Params

obj {Object}: The object to iterate over.
options {Object}
returns {String}

Take arguments and, if they are string or number, convert them to a dot-delineated object property path.

Params

prop {String|Number}: The property segments to assemble (can be multiple).
returns {String}

Use property paths (a.b.c) to get a value or nested value from the context. Works as a regular helper or block helper.

Params

prop {String}: The property to get, optionally using dot notation for nested properties.
context {Object}: The context object
options {Object}: The handlebars options object, if used as a block helper.
returns {String}

Use property paths (a.b.c) to get an object from the context. Differs from the get helper in that this helper will return the actual object, including the given property key. Also, this helper does not work as a block helper.

Params

prop {String}: The property to get, optionally using dot notation for nested properties.
context {Object}: The context object
returns {String}

Return true if key is an own, enumerable property of the given context object.

Params

key {String}
context {Object}: The context object.
returns {Boolean}

Example

{{hasOwn context key}}

Return true if value is an object.

Params

value {String}
returns {Boolean}

Example

{{isObject "foo"}}
//=> false

Parses the given string using JSON.parse.

Params

string {String}: The string to parse

Example

<!-- string: '{"foo": "bar"}' -->
{{JSONparse string}}
<!-- results in: { foo: 'bar' } -->

Stringify an object using JSON.stringify.

Params

obj {Object}: Object to stringify
returns {String}

Example

<!-- object: { foo: 'bar' } -->
{{JSONstringify object}}
<!-- results in: '{"foo": "bar"}' -->

Deeply merge the properties of the given objects with the context object.

Params

object {Object}: The target object. Pass an empty object to shallow clone.
objects {Object}
returns {Object}

Pick properties from the context object.

Params

properties {Array|String}: One or more properties to pick.
context {Object}
options {Object}: Handlebars options object.
returns {Object}: Returns an object with the picked values. If used as a block helper, the values are passed as context to the inner block. If no values are found, the context is passed to the inverse block.

path

Get the directory path segment from the given filepath.

Params

ext {String}
returns {String}

Example

{{absolute "docs/toc.md"}}
<!-- results in: 'docs' -->

Get the directory path segment from the given filepath.

Params

ext {String}
returns {String}

Example

{{dirname "docs/toc.md"}}
<!-- results in: 'docs' -->

Get the relative filepath from a to b.

Params

a {String}
b {String}
returns {String}

Example

{{relative a b}}

Get the file extension from the given filepath.

Params

ext {String}
returns {String}

Example

{{basename "docs/toc.md"}}
<!-- results in: 'toc.md' -->

Get the "stem" from the given filepath.

Params

filepath {String}
returns {String}

Example

{{stem "docs/toc.md"}}
<!-- results in: 'toc' -->

Get the file extension from the given filepath.

Params

filepath {String}
`retur

array assemble collection comparison date handlebars helper helpers html i18n inflection log logging markdown math number object path repeat string template time url util utility

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fumanchu

Breaking Changes from v2 to v3

Table of Contents

Usage Nodejs

Using Handlebars Helpers

Helpers

Categories

All helpers

array

collection

comparison

date

fs

html

i18n

inflection

logging

markdown

match

math

misc

number

object