Modal for links

src/widgets/modals.ts

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+import {
+  ModalWidgetStyleOptions,
+  modalStyles,
+  getModalStyle,
+  getModalContentStyle,
+  getModalCloseStyle
+} from './modalsStyle'
+import { getClasses } from '../jss'
+
+export type ListItem = {
+  label: string,
+  link: string
+}
+
+// Two functions that need to be implemented to use the modal
+// When the user clicks the button, open the modal
+/* Click handler on the button to display it.
+btn.onclick = function() {
+  modal.style.display = "block";
+}
+
+// When the user clicks anywhere outside of the modal, close it
+Window click handler so that the modal will close
+even if the user doesn't click close
+window.onclick = function(event) {
+  if (event.target == modal) {
+    modal.style.display = "none";
+  } */
+const closeClickHandler = () => {
+  const modal: HTMLDivElement | null = document.querySelector('.modal')
+  if (modal) {
+    modal.style.display = 'none'
+  }
+}
+
+const createModal = (dom: HTMLDocument, options: ModalWidgetStyleOptions) => {
+  const modal = dom.createElement('div')
+  const style = getModalStyle(options)
+  const { classes } = getClasses(dom.head, {
+    modal: style
+  })
+  modal.classList.add(classes.modal)
+  return modal
+}
+
+const createModalContent = (dom: HTMLDocument) => {
+  const modalContent: HTMLDivElement = dom.createElement('div')
+  const style = getModalContentStyle()
+  const { classes } = getClasses(dom.head, {
+    modalContent: style
+  })
+  modalContent.classList.add(classes.modalContent)
+  return modalContent
+}
+
+const createCloseButton = (dom: HTMLDocument) => {
+  const closeButton: HTMLSpanElement = dom.createElement('span')
+  closeButton.addEventListener('click', closeClickHandler)
+  const style = getModalCloseStyle()
+  const { classes } = getClasses(dom.head, {
+    close: style
+  })
+  closeButton.classList.add(classes.close)
+  return closeButton
+}
+
+const createListItems = (dom: HTMLDocument, list: ListItem) => {
+  const li:HTMLLIElement = dom.createElement('li')
+  li.setAttribute('style', modalStyles.listItemStyle)
+  const link: HTMLAnchorElement = dom.createElement('a')
+  link.setAttribute('style', modalStyles.anchorStyle)
+  link.href = list.link
+  link.innerHTML = list.label
+  li.appendChild(link)
+  return li
+}
+
+const createUnOrderedList = (dom: HTMLDocument, listOfLinks: ListItem[]) => {
+  const ul: HTMLUListElement = dom.createElement('ul')
+  ul.setAttribute('style', modalStyles.unorderedListStyle)
+  listOfLinks.forEach(list => {
+    const li = createListItems(dom, list)
+    ul.appendChild(li)
+  })
+  return ul
+}
+export const createWindow = (dom: HTMLDocument, listOfLinks: ListItem[], options: ModalWidgetStyleOptions) => {
+  const modal = createModal(dom, options)
+  const modalContent = createModalContent(dom)
+  const closeButton = createCloseButton(dom)
+  const ul = createUnOrderedList(dom, listOfLinks)
+  modalContent.appendChild(closeButton)
+  modalContent.appendChild(ul)
+  modal.appendChild(modalContent)
+}

src/widgets/modalsStyle.ts

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+/**
+ * Get the button style, based on options.
+ * See https://design.inrupt.com/atomic-core/?cat=Atoms#Buttons
+ */
+export type ModalWidgetStyleOptions = {
+  topPosition?: string,
+  leftPosition?: string,
+  withGreyedBackground?: boolean
+}
+
+export const modalStyles = {
+  unorderedListStyle: 'padding: 0 .2em;',
+  listItemStyle: 'list-style: none; box-shadow: 1px 1px 1px 1px #888888; padding: .5em',
+  anchorStyle: 'text-decoration: none'
+}
+
+export const getModalStyle = (options: ModalWidgetStyleOptions = {}) => {
+  const topPosition = (options.topPosition) ? options.topPosition : '50px'
+  const leftPosition = (options.leftPosition) ? options.leftPosition : '50px'
+
+  if (options.withGreyedBackground) {
+    return {
+      display: 'none',
+      position: 'fixed',
+      'z-index': '1',
+      overflow: 'auto', /* Enable scroll if needed */
+      'background-color': 'rgba(0,0,0,0.4)', /* Black w/ opacity */
+      'padding-top': '100px',
+      left: '0',
+      top: '0',
+      width: '100%',
+      height: '100%'
+    }
+  }
+
+  return {
+    display: 'none',
+    position: 'fixed',
+    'z-index': '1',
+    top: `${topPosition}`,
+    left: `${leftPosition}`,
+    overflow: 'auto', /* Enable scroll if needed */
+    'background-color': 'rgba(0,0,0,0.4)' /* Black w/ opacity */
+  }
+}
+
+export const getModalContentStyle = () => {
+  return {
+    display: 'flex',
+    'flex-direction': 'column',
+    'background-color': '#fefefe'
+  }
+}
+
+export const getModalCloseStyle = () => {
+  return {
+    color: '#aaaaaa',
+    'align-self': 'flex-end',
+    'font-size': '20px',
+    'font-weight': 'bold',
+    'margin-right': '.2em',
+    'margin-top': '.2em',
+    '&:hover': {
+      'text-decoration': 'none',
+      cursor: 'pointer'
+    },
+    '&:focus': {
+      'text-decoration': 'none',
+      cursor: 'pointer'
+    }
+  }
+}