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paulerickson/index.html

Created December 19, 2019 17:06
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index.html
<!doctype html>
<script type="module">
import './myuw-help.mjs';
let numberOfHelpDialogs = 0;
const defaultCheckbox = document.body.appendChild(document.createElement('input'));
defaultCheckbox.type = 'checkbox';
defaultCheckbox.title = 'default?';
const createButton = document.body.appendChild(document.createElement('button'));
createButton.textContent = 'Create New Help Element';
createButton.onclick = () => {
const dialogNumber = ++numberOfHelpDialogs;
const help = document.body.appendChild(document.createElement('myuw-help'));
const buttonElement = document.body.appendChild(document.createElement('button'));
help.setAttribute('myuw-help-title', 'HALP!');
buttonElement.textContent = `Toggle ${dialogNumber}`;
buttonElement.onclick = () => help.hasAttribute('open')? help.removeAttribute('open') : help.setAttribute('open', '');
if (!defaultCheckbox.checked) {
['Foo', 'Bar', 'Baz'].forEach(label => {
const link = help.appendChild(document.createElement('a'));
link.href = label;
link.textContent = `${label}${dialogNumber}`;
link.slot = 'myuw-help-content';
});
}
};
</script>
<body></body>
Raw
myuw-help.mjs
var tpl = "<style> :host {\n display: flex;\n font-style: inherit;\n font-variant: inherit;\n font-family: inherit;\n }\n\n :host([hidden]) {\n display: none;\n }\n\n :host([show-default-content]) #myuw-help__default-content {\n display: block;\n }\n\n :host([show-button]) #help-button {\n display: flex;\n }\n\n :host([open]) #myuw-help__dialog {\n opacity: 1;\n display: block;\n }\n\n :host([open]) #myuw-help__shadow {\n opacity: 1;\n height: 100%;\n }\n\n /* Duplicate styles to appease firefox */\n myuw-help {\n display: flex;\n font-style: inherit;\n font-variant: inherit;\n font-family: inherit;\n }\n\n myuw-help[hidden] {\n display: none;\n }\n\n myuw-help[show-default-content] #myuw-help__default-content {\n display: block;\n }\n\n myuw-help[show-button] #help-button {\n display: flex;\n }\n\n myuw-help[open] #myuw-help__dialog {\n opacity: 1;\n display: block;\n }\n\n myuw-help[open] #myuw-help__shadow {\n opacity: 1;\n /* height: 100%; */\n }\n\n #myuw-help__dialog {\n display: none;\n max-width: 80%;\n min-width: 300px;\n height: auto;\n -webkit-box-shadow: 0 -2px 25px 0 rgba(0, 0, 0, 0.15), 0 13px 25px 0 rgba(0, 0, 0, 0.3);\n box-shadow: 0 -2px 25px 0 rgba(0, 0, 0, 0.15), 0 13px 25px 0 rgba(0, 0, 0, 0.3);\n background-color: #FFFFFF;\n padding: 22px 24px 12px;\n margin-top: 0;\n margin-bottom: 0;\n margin-left: auto;\n margin-right: auto;\n border-radius: 5px;\n font-family: var(--myuw-font, 'Roboto', Arial, sans-serif);\n opacity: 0;\n position: absolute;\n float: left;\n top: 0;\n right: -1000px;\n -webkit-transition: all .4s cubic-bezier(.25, .8, .25, 1);\n transition: all .4s cubic-bezier(.25, .8, .25, 1);\n z-index: 101;\n }\n\n #myuw-help__heading {\n display: flex;\n align-content: center;\n justify-content: space-between;\n }\n\n #myuw-help__title {\n color: rgba(0, 0, 0, 0.8);\n font-size: 20px;\n font-weight: 500;\n line-height: 24px;\n letter-spacing: 0.03px;\n }\n\n #myuw-help__content {\n font-weight: 400;\n font-size: 16px;\n color: rgba(0, 0, 0, .8);\n line-height: 24px;\n text-align: left;\n letter-spacing: 0.03px;\n padding: 8px 0 16px;\n }\n\n #myuw-help__default-content ul {\n margin: 0;\n padding: 0;\n list-style-type: none;\n }\n\n #myuw-help__default-content ul li {\n transition: background 0.4s cubic-bezier(.25, .8, .25, 1);\n display: flex;\n justify-content: flex-start;\n align-items: center;\n min-height: 38px;\n height: auto;\n padding: 0 16px 0 6px;\n }\n\n #myuw-help__default-content ul li:hover {\n background: rgba(158, 158, 158, 0.2);\n }\n\n #myuw-help__default-content a {\n text-decoration: none;\n color: #0479a8;\n /* TODO: use styles variables */\n min-height: 38px;\n line-height: 38px;\n flex: auto;\n display: flex;\n align-items: center;\n }\n\n #myuw-help__default-content .material-icons {\n width: 24px;\n min-height: 24px;\n min-width: 24px;\n margin-right: 12px;\n color: #434343;\n }\n\n #myuw-help__shadow {\n position: fixed;\n top: 64px;\n left: 0;\n width: 100%;\n height: 0;\n opacity: 0;\n background: rgba(0, 0, 0, 0.3);\n transition: opacity 0.3s cubic-bezier(.25, .8, .25, 1);\n z-index: 100;\n }\n\n #myuw-help__close-button {\n min-width: 48px;\n max-width: 48px;\n min-height: 48px;\n max-height: 48px;\n margin: 0;\n display: flex;\n -webkit-box-pack: center;\n -ms-flex-pack: center;\n -webkit-box-align: center;\n -ms-flex-line-pack: center;\n -ms-flex-align: center;\n justify-content: center;\n align-content: center;\n align-items: center;\n position: relative;\n cursor: pointer;\n border-radius: 3px;\n box-sizing: border-box;\n -webkit-user-select: none;\n -moz-user-select: none;\n -ms-user-select: none;\n user-select: none;\n border: 0;\n padding: 0 6px;\n background: transparent;\n white-space: nowrap;\n text-transform: uppercase;\n font-weight: 500;\n font-size: 14px;\n text-decoration: none;\n overflow: hidden;\n -webkit-transition: box-shadow .4s cubic-bezier(.25, .8, .25, 1), background-color .4s cubic-bezier(.25, .8, .25, 1);\n transition: box-shadow .4s cubic-bezier(.25, .8, .25, 1), background-color .4s cubic-bezier(.25, .8, .25, 1);\n border-radius: 50%;\n }\n\n #myuw-help__close-button:hover {\n background-color: rgba(158, 158, 158, 0.2);\n }\n\n #help-button {\n display: none;\n justify-content: center;\n align-content: center;\n align-items: center;\n position: relative;\n cursor: pointer;\n min-height: 42px;\n min-width: 42px;\n height: 42px;\n width: 42px;\n user-select: none;\n outline: none;\n padding: 0;\n border: 0;\n border-radius: 50%;\n margin: 0 6px;\n background-color: transparent;\n -webkit-transition: background-color .3s cubic-bezier(.35, 0, .25, 1);\n transition: background-color .3s cubic-bezier(.35, 0, .25, 1);\n }\n\n #help-icon {\n color: var(--myuw-primary-color, #fff);\n fill: var(--myuw-primary-color, #fff);\n height: 30px;\n width: 30px;\n }\n\n #help-button:hover {\n background-color: rgba(0, 0, 0, 0.2);\n }\n\n #help-button:focus,\n #help-button:active {\n outline: 2px solid #5e9ed6;\n outline: -webkit-focus-ring-color auto 5px;\n }\n\n @media all and (min-width: 481px) and (max-width: 840px) {\n #myuw-help__dialog {\n width: 400px;\n }\n }\n\n @media all and (min-width: 841px) {\n #myuw-help__dialog {\n width: 600px;\n }\n } </style> <button id=\"help-button\" aria-label=\"Open help dialog\"> <svg id=\"help-icon\" xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\"> <path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm1 17h-2v-2h2v2zm2.07-7.75l-.9.92C13.45 12.9 13 13.5 13 15h-2v-.5c0-1.1.45-2.1 1.17-2.83l1.24-1.26c.37-.36.59-.86.59-1.41 0-1.1-.9-2-2-2s-2 .9-2 2H8c0-2.21 1.79-4 4-4s4 1.79 4 4c0 .88-.36 1.68-.93 2.25z\"/> <path d=\"M0 0h24v24H0z\" fill=\"none\"/> </svg> </button> <div id=\"myuw-help__dialog\"> <div id=\"myuw-help__heading\"> <h1 id=\"myuw-help__title\"></h1> <button id=\"myuw-help__close-button\" aria-label=\"Close help dialog\"> <svg xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\"> <path d=\"M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z\"/> <path d=\"M0 0h24v24H0z\" fill=\"none\"/> </svg> </button> </div> <div id=\"myuw-help__content\"> <slot name=\"myuw-help-content\"> <div id=\"myuw-help__default-content\"> <ul> <li> <a href=\"tel:608-264-4357\">Call the help desk</a> </li> <li> <a href=\"mailto:[email protected]\">Email the help desk</a> </li> <li> <a href=\"https://it.wisc.edu\">Get help another way</a> </li> <li> <a href=\"https://outages.doit.wisc.edu/\">Check the Outages page</a> </li> <li> <a href=\"https://kb.wisc.edu/\">Search the KnowledgeBase</a> </li> </ul> </div> </slot> </div> </div> <div id=\"myuw-help__shadow\"></div> ";
class MyUWHelp extends HTMLElement {
static get elementName() {
return 'myuw-help';
}
static get observedAttributes() {
return [
'myuw-help-title',
'open',
'show-button',
'show-default-content'
];
}
static get template() {
if (this._template === undefined) {
this._template = document.createElement('template');
this._template.innerHTML = tpl;
}
return this._template;
}
constructor() {
super();
this.attachShadow({ mode: 'open' });
this.shadowRoot.appendChild(this.constructor.template.content.cloneNode(true));
this.$customPosition = {};
this.titleHeadingElement = this.shadowRoot.getElementById('myuw-help__title');
this.$button = this.shadowRoot.getElementById('help-button');
this.$dialog = this.shadowRoot.getElementById('myuw-help__dialog');
this.contentSlotElement = this.shadowRoot.querySelector('slot[name=myuw-help-content]');
this.$backdrop = this.shadowRoot.getElementById('myuw-help__shadow');
this.$dialogCloseButton = this.shadowRoot.getElementById('myuw-help__close-button');
this.eventListeners = [
{ target: document, type: 'set-myuw-help-position', handler: event => this.handleDocumentSetHelpPosition(event) },
{ target: document, type: 'show-myuw-help', handler: event => this.handleDocumentShowHelp(event) },
{ target: this.$backdrop, type: 'click', handler: event => this.handleBackdropClick(event) },
{ target: this.$button, type: 'click', handler: event => this.handleButtonClick(event) },
{ target: this.$dialog, type: 'keydown', handler: event => this.handleDialogKeydown(event) },
{ target: this.$dialogCloseButton, type: 'click', handler: event => this.handleDialogCloseButtonClick(event) }
];
}
/**
* Array of the focusable elements within the modal, with the close button last.
* Always expected to have length 1 or greater, because of the close button.
*
* @returns {Array<Element>}
*/
get focusableElements() {
const selector = "a[href], input:not([disabled]), button:not([disabled]), button, select, textarea";
const focusableElements = this.contentSlotElement.assignedElements({ flatten: true })
.reduce(
(agg, node) => {
if (node.matches(selector)) {
agg.push(node);
}
else {
node.querySelectorAll(selector).forEach(each => agg.push(each));
}
return agg;
},
[]
)
;
focusableElements.push(this.$dialogCloseButton);
return focusableElements;
}
attributeChangedCallback(name, oldValue, newValue) {
switch(name) {
case 'myuw-help-title':
this.titleHeadingElement.innerHTML = newValue;
break;
case 'open':
// opening
if (oldValue === null && newValue !== null) {
this.setDialogPosition();
this.focusableElements[0].focus();
return;
}
// closing
if (oldValue !== null && newValue === null) {
this.resetDialogPosition();
}
// no change in open/close state; do nothing
break;
}
}
connectedCallback(){
this.eventListeners.forEach( ({target, type, handler}) => target.addEventListener(type, handler));
}
disconnectedCallback(){
this.eventListeners.forEach( ({target, type, handler}) => target.removeEventListener(type, handler));
}
handleButtonClick(event) {
this.toggle();
event.preventDefault();
}
handleDocumentShowHelp(event) {
this.toggle();
event.preventDefault();
}
handleDocumentSetHelpPosition(event) {
if (event.detail && event.detail.position) {
this.$customPosition = event.detail.position;
}
event.preventDefault();
}
handleDialogKeydown(event) {
switch(event.key) {
default:
return;
case 'Escape':
this.close();
break;
case 'Tab':
if (event.shiftKey) {
this.focusPrevious();
}
else {
this.focusNext();
}
break;
case 'ArrowDown':
this.focusNext();
break;
case 'ArrowUp':
this.focusPrevious();
break;
}
event.preventDefault();
}
handleBackdropClick(event) {
this.close();
event.preventDefault();
}
handleDialogCloseButtonClick(event) {
this.close();
event.preventDefault();
}
toggle() {
if (this.hasAttribute('open')) {
this.close();
} else {
this.open();
}
}
open() {
this.setAttribute('open', '');
}
close() {
this.removeAttribute('open');
}
/**
* Focus the next option in the dialog, cycling around to the first
*/
focusNext() {
const focusableElements = this.focusableElements;
const focusedElement = this.isSameNode(document.activeElement) ? this.shadowRoot.activeElement : document.activeElement;
const focusedIndex = focusableElements.indexOf(focusedElement);
if (focusedIndex === focusableElements.length - 1 || focusedIndex === -1) {
focusableElements[0].focus();
}
else {
focusableElements[focusedIndex + 1].focus();
}
}
/**
* Focus the previous option in the dialog, cycling around to the last (the close button)
*/
focusPrevious() {
const focusableElements = this.focusableElements;
const focusedElement = this.isSameNode(document.activeElement) ? this.shadowRoot.activeElement : document.activeElement;
const focusedIndex = focusableElements.indexOf(focusedElement);
if (focusedIndex === 0 || focusedIndex === -1) {
focusableElements[focusableElements.length - 1].focus();
}
else {
focusableElements[focusedIndex - 1].focus();
}
}
/**
* Position the dialog off-screen
*/
resetDialogPosition() {
this.$dialog.style.top = 0;
this.$dialog.style.left = 'auto';
this.$dialog.style.right = '-1000px';
}
/**
* Position the dialog in the middle of the screen
*/
setDialogPosition() {
if (this.$customPosition.left && this.$customPosition.top) {
this.$dialog.style.left = this.$customPosition.left;
this.$dialog.style.top = this.$customPosition.top;
this.$dialog.style.right = 'auto';
return;
}
// Dialog dimensions
const dialogWidth = this.$dialog.offsetWidth;
const dialogHeight = this.$dialog.offsetHeight;
// Screen dimensions
// These variables check to make sure mobile is supported and scroll bar is accounted for across browsers
const cssWidth = window.innerWidth && document.documentElement.clientWidth
? Math.min(window.innerWidth, document.documentElement.clientWidth) : window.innerWidth ||
document.documentElement.clientWidth ||
document.getElementsByTagName('body')[0].clientWidth;
const cssHeight = window.innerHeight && document.documentElement.clientHeight
? Math.min(window.innerHeight, document.documentElement.clientHeight) : window.innerHeight ||
document.documentElement.clientHeight ||
document.getElementsByTagName('body')[0].clientHeight;
// Dialog position
const topPosition = ((cssHeight - dialogHeight) / 3);
const leftPosition = ((cssWidth - dialogWidth) / 2);
// Set positioning
this.$dialog.style.left = leftPosition + 'px';
this.$dialog.style.top = topPosition + 'px';
this.$dialog.style.right = 'auto';
}
}
if (customElements.get(MyUWHelp.elementName) === undefined) {
customElements.define(MyUWHelp.elementName, MyUWHelp);
}
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