Nunjucks components and filters for building gov.uk pages with hmpo-form-wizard
npm install [--save] hmpo-components;const path = require('path');
const express = require('express');
const i18n = require('hmpo-i18n');
const hmpoComponents = require('hmpo-template-components');
let views = [
path.resolve(__dirname, 'views'),
path.resolve(__dirname, 'node_modules', 'hmpo-components', 'components'),
path.resolve(__dirname, 'node_modules', 'govuk-frontend'),
path.resolve(__dirname, 'node_modules', 'govuk-frontend', 'components')
];
let nunjucksEnv = nunjucks.configure(views, { express: app });
i18n.middleware(app);
hmpoComponents.setup(app, nunjucksEnv);
app.set('view engine', 'html');
app.use(function (req, res) {
res.render('mytemplate');
});If rendering as part of an HMPO controller's middleware chain then the field configuration will automatically be set to res.locals.options.fields by the controller, and will be loaded from here by the components
Translation is performed using a req.translate local function, for example as provided by hmpo-i18n
Components can be called as macros:
{% from "hmpo-input/macro.njk" import hmpoInput %}
{% from "hmpo-submit/macro.njk" import hmpoSubmit %}
{{ hmpoInput(ctx, { id: "fieldId" }) }}
{{ hmpoSubmit(ctx, { key: "textKey" }) }}hmpoForm(ctx, params)
hmpoErrorGroup(ctx, params)
hmpoAutoSubmit(ctx, params)
hmpoSubmit(ctx, params)
hmpoCharacterCount(ctx, params)
hmpoCheckboxes(ctx, params);
hmpoDate(ctx, params)
hmpoNumber(ctx, params)
hmpoPhone(ctx, params)
hmpoRadios(ctx, params)
hmpoSelect(ctx, params)
hmpoText(ctx, params)
hmpoTextarea(ctx, params)
hmpoWordCount(ctx,params)Most govuk-frontend parameters can be specified in the fields config, or supplied to the component directly. Label, hint, and legend text is loaded from localisation using a default key structure unless overridden.
label.key: overridden label key.legend.key: overridden legend key.hint.key: overridden hint keyitems: Array of select box, radio, or checkbox options, or an Array of govuk item objects.legend: Applicable to radio button controls, which are wrapped in a HTML fieldset with a legend element.hmpoCircleStep(params);
hmpoCircleStepList(params);
hmpoClose(params);
hmpoCookieBanner(params);
hmpoDetails(params)
hmpoFlashCard(params)
hmpoFooter(params)
hmpoInsetText(params)
hmpoPrintPage(params)
hmpoSidebar(params)
hmpoWarningText(params)hmpoCharsLeft(ctx, params)hmpoHtml(obj)hmpoCharacterCount will be replacing hmpoCharsLeft however for backwards compatability it will still be remaining. When using hmpoCharacterCount you will need specify a maxlength validator for the component in fields.js whereas for hmpoWordCount you will need to specify a maxwords validator. An example can be found below.
'my-character-count': {
...
validate: [
...,
{ type: 'maxlength', arguments: 10 }
]
},
'my-word-count': {
...
validate: [
...,
{ type: 'maxwords', arguments: 10 }
]
},You may also want to add a translation for the component and that can be found below. You will need to keep %{count} as this is used by the govuk frontend component to parse the character/word count:
Messages in the validation object are required by default
"my-character-count": {
...
(The keys bellow will allow translation of the hint text. %{count} is parsed by gds to show dynamic count)
"textareaDescriptionText": "Enter up to %{count} characters" - shown, instead of dynamic count, to the user if javascript is disabled,
"charactersUnderLimitText": {
"one": "you have one char left" - shown when user has one characters left
"other": "you have %{count} characters left" - shown when user has n characters left
} - shown to user when they have n characters remaining
"charactersAtLimitText": "you have 0 characters remaining" - shown when user has no characters left
"charactersOverLimitText": {
"one": "you have entered 1 character too many " - shown when user has one character over the limit
"other": "you have %{count} characters too many" - shown when user has n. characters over the limit
} - shown to user when they have exceed number of allowed characters
validation: {
...
"maxlength": "You can only enter up to {{maxlength}} characters" - required by default
}
},
"my-word-count": {
...
(The keys bellow will allow translation of the hint text. %{count} is parsed by gds to show dynamic count)
"textareaDescriptionText": "Enter up to %{count} chars" - shown, instead of dynamic count, to the user if javascript is disabled,
"wordsUnderLimitText": {
"one": "you have one word left" - shown when user has one word left
"other": "you have %{count} wrods left" - shown when user has n words left
} - shown to user when they have n words remaining
"wordsAtLimitText": "you have 0 words remaining" - shown when user has no words left
"wordsOverLimitText": {
"one": "you have entered one word too many " - shown when user has one word over the limit
"other": "you have %{count} words too many" - shown when user has n. words over the limit
} - shown to user when they have exceed number of allowed words
validation: {
...
"maxwords": "You can only enter up to {{maxwords}} words" - required by default
}
}translate
selected
lowercase
uppercase
capscase
hyphenate
date
time
currency
currencyOrFree
url
filter
adddate filterDates should be provided a a format that moment can decode, such as ISO String format, moment object, or epoch milliseconds.
{{ "2017-06-03T12:34:56.000Z" | date }}
3 June 2017A moment format can be supplied. The default format is D MMMM YYYY.
{{ "2017-06-3T12:34:56.000Z" | date("DD MMM YYYY HH:MMa") }}
03 Jun 2017 12:34pmtime filterThe time formatter wraps a formatted time to correct for GDS standard:
{{ "3:00pm" | time }}
3pm
{{ "11 May 2017 at 12:00pm" | time }}
11 May 2017 at midday
{{ "12:00am" | time }}
MidnightOptions can be provided to only do transforms for midday, midnight, or shortened time:
{{ "12:00pm" | time({ short: true, midnight: true, midnight: false }) }}
12pmUse the controller mixins to extend the base wizard controller:
const BaseController = require('hmpo-form-wizard').Controller;
const DateControllerMixin = require('hmpo-components').mixins.Date;
const DateController = DateControllerMixin(BaseController);
class MyController extends DateController {
}The DateController mixin adds day, month, and year fields for a YYYY-MM-DD date field so the hmpoDate component can be validated and processed properly.
The date field must use the date validator to use this functionality.
Additional validation errors can be produced and need localisation, for example:
"validation": {
"date": "Enter a complete {{name}}",
"date-year": "Enter a valid year",
"date-month": "Enter a valid month",
"date-day": "Enter a valid day",
"required-day": "Enter a complete {{name}}",
"required-month": "Enter a complete {{name}}",
"required-year": "Enter a complete {{name}}",
"numeric-year": "Enter a year using numbers only",
"numeric-month": "Enter a month using numbers only",
"numeric-day": "Enter a day using numbers only"
}field parameter to custom errors to an error to override the link.$hmpo-summary-list: false;$hmpo-text-size: "big";