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ADG-142 - Replace jQuery with Vanilla JS #455

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88 changes: 39 additions & 49 deletions ...s/validation-messages/_examples/form-validation-with-messages-next-to-controls/example.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,67 +1,57 @@
;(function () {
var validateInput
function getUrlParam(name) {
return new URLSearchParams(window.location.search).get(name)
}

$.urlParam = function (name) {
var results
results = new RegExp('[?&]' + name + '=([^&#]*)').exec(window.location.href)
if (results === null) {
return null
} else {
return decodeURI(results[1]) || null
function showError(input, message) {
let errorContainer = input.closest('fieldset') || input.parentElement
if (!errorContainer) return

const errorId = `${input.name}-error`
input.setAttribute('aria-describedby', errorId)
input.setAttribute('aria-invalid', 'true')

if (!document.getElementById(errorId)) {
const errorMessage = document.createElement('p')
errorMessage.id = errorId
errorMessage.className = 'error'
errorMessage.textContent = message
errorContainer.appendChild(errorMessage)
}

if (!document.querySelector(':focus')) {
input.focus()
}
}

validateInput = function (input, message) {
var $elementToDescribe,
$errorContainer,
$fieldset,
$input,
$referencedElement,
value
$input = $('[name="' + input + '"]')
if ((value = $.urlParam(input)) === null) {
$referencedElement = null
$elementToDescribe = null
$errorContainer = null
if ($input.is(':radio')) {
$fieldset = $input.closest('fieldset')
$elementToDescribe = $fieldset
$errorContainer = $fieldset
$referencedElement = $input.filter(':first')
} else {
$elementToDescribe = $input
$errorContainer = $input.parent()
$referencedElement = $input
}
$elementToDescribe.attr('aria-describedby', input + '_description')
$errorContainer.append(
'<p id="' + input + '_description" class="error">' + message + '</p>'
)
if ($(':not(body):focus').length === 0) {
// See https://stackoverflow.com/questions/46134247/jquery-setting-focus-doesnt-work-in-ie11/
return $referencedElement.focus()
}
function validateInput(name, message) {
const input = document.querySelector(`[name="${name}"]`)
if (!input) return

const value = getUrlParam(name)
if (!value) {
showError(input, message)
} else {
if ($input.is(':checkbox')) {
$input.attr('checked', true)
}
if ($input.is(':radio')) {
return $input.filter('[value="' + value + '"]').attr('checked', true)
if (input.type === 'checkbox' || input.type === 'radio') {
document
.querySelector(`[name="${name}"][value="${value}"]`)
.setAttribute('checked', 'true')
} else {
return $input.val(value)
input.value = value
}
}
}

$(document).ready(function () {
if ($.urlParam('validate')) {
document.addEventListener('DOMContentLoaded', () => {
if (getUrlParam('validate')) {
validateInput('name', 'Please enter your name!')
validateInput('biography', 'Please tell us something about your history!')
validateInput('gender', 'Please tell us your gender!')
validateInput('accept_agbs', 'You must accept our terms and conditions!')
if ($('.error').length === 0) {
return alert('All inputs are valid.')

if (!document.querySelector('.error')) {
alert('All inputs are valid.')
}
}
})
}).call(this)
})()
107 changes: 42 additions & 65 deletions ...mples/forms/validation-messages/_examples/form-validation-with-messages-on-top/example.js
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,83 +1,60 @@
;(function () {
var validateInput
function getUrlParam(name) {
return new URLSearchParams(window.location.search).get(name)
}

$.urlParam = function (name) {
var results
results = new RegExp('[?&]' + name + '=([^&#]*)').exec(window.location.href)
if (results === null) {
return null
} else {
return decodeURI(results[1]) || null
function showError(input, message) {
let errorContainer = document.querySelector('.errors ul')
if (!errorContainer) {
const fieldset = document.createElement('fieldset')
fieldset.className = 'errors'
fieldset.innerHTML = '<legend>Errors</legend><ul></ul>'
document.body.prepend(fieldset)
errorContainer = fieldset.querySelector('ul')
}

const errorId = `${input.name}-error`
input.setAttribute('aria-describedby', errorId)
input.setAttribute('aria-invalid', 'true')

const errorItem = document.createElement('li')
errorItem.innerHTML = `<a href="#${input.id}" id="${errorId}" class="error">${message}</a>`
errorItem.querySelector('a').addEventListener('click', e => {
input.focus()
e.preventDefault()
})

errorContainer.appendChild(errorItem)
}

validateInput = function (input, message) {
var $elementToDescribe,
$error,
$errorContainer,
$fieldset,
$input,
$referencedElement,
value
$input = $('[name="' + input + '"]')
if ((value = $.urlParam(input)) === null) {
if ($('fieldset.errors').length === 0) {
$('body').prepend(
'<fieldset class="errors"><legend>Errors</legend><ul></ul></fieldset>'
)
}
$referencedElement = null
$elementToDescribe = null
$errorContainer = $('fieldset.errors ul')
if ($input.is(':radio')) {
$fieldset = $input.closest('fieldset')
$elementToDescribe = $fieldset
$referencedElement = $input.filter(':first')
} else {
$elementToDescribe = $input
$referencedElement = $input
}
$error = $(
'<a href="#' +
$referencedElement.attr('id') +
'" id="' +
input +
'_description" class="error">' +
message +
'</a>'
)
$error.click(e => {
// If we rely on the link's href pointing to the input's ID, it doesn't trigger forms mode in screen readers
$referencedElement.focus()
return e.preventDefault()
})
$elementToDescribe.attr('aria-describedby', input + '_description')
$errorContainer.append('<li>').find('li:last').append($error)
if ($(':not(body):focus').length === 0) {
// See https://stackoverflow.com/questions/46134247/jquery-setting-focus-doesnt-work-in-ie11/
return $errorContainer.find('a').focus()
}
function validateInput(name, message) {
const input = document.querySelector(`[name="${name}"]`)
if (!input) return

const value = getUrlParam(name)
if (!value) {
showError(input, message)
} else {
if ($input.is(':checkbox')) {
$input.attr('checked', true)
}
if ($input.is(':radio')) {
return $input.filter('[value="' + value + '"]').attr('checked', true)
if (input.type === 'checkbox' || input.type === 'radio') {
document
.querySelector(`[name="${name}"][value="${value}"]`)
.setAttribute('checked', 'true')
} else {
return $input.val(value)
input.value = value
}
}
}

$(document).ready(function () {
if ($.urlParam('validate')) {
document.addEventListener('DOMContentLoaded', () => {
if (getUrlParam('validate')) {
validateInput('name', 'Please enter your name!')
validateInput('biography', 'Please tell us something about your history!')
validateInput('gender', 'Please tell us your gender!')
validateInput('accept_agbs', 'You must accept our terms and conditions!')
if ($('.error').length === 0) {
return alert('All inputs are valid.')

if (!document.querySelector('.error')) {
alert('All inputs are valid.')
}
}
})
}).call(this)
})()