<strong>Saladict</strong> is awesome!

Saladict is <strong><a href="#" rel="external nofollow" >awesome</a></strong>!

const INLINE_TAGS = new Set([
 // Inline text semantics
 'a', 'abbr', 'b', 'bdi', 'bdo', 'br', 'cite', 'code', 'data', 'dfn', 'em', 'i',
 'kbd', 'mark', 'q', 'rp', 'rt', 'rtc', 'ruby', 's', 'samp', 'small',
 'span', 'strong', 'sub', 'sup', 'time', 'u', 'var', 'wbr'
])

const selection = window.getSelection()
const selectedText = selection.toString()
if (!selectedText.trim()) { return '' }

let sentenceHead = ''
const anchorNode = selection.anchorNode
if (anchorNode.nodeType === Node.TEXT_NODE) {
 let leadingText = anchorNode.textContent.slice(0, selection.anchorOffset)
 for (let node = anchorNode.previousSibling; node; node = node.previousSibling) {
 if (node.nodeType === Node.TEXT_NODE) {
 leadingText = node.textContent + leadingText
 } else if (node.nodeType === Node.ELEMENT_NODE) {
 leadingText = node.innerText + leadingText
 }
 }

 for (
 let element = anchorNode.parentElement;
 element && INLINE_TAGS.has(element.tagName.toLowerCase()) && element !== document.body;
 element = element.parentElement
 ) {
 for (let el = element.previousElementSibling; el; el = el.previousElementSibling) {
 leadingText = el.innerText + leadingText
 }
 }

 sentenceHead = (leadingText.match(sentenceHeadTester) || [''])[0]
}

// match head   a.b is ok chars that ends a sentence
const sentenceHeadTester = /((\.(?![ .]))|[^.?!。？！…\r\n])+$/

// match tail       for "..."
const sentenceTailTester = /^((\.(?![ .]))|[^.?!。？！…\r\n])+(.)\3{0,2}/

return (sentenceHead + selectedText + sentenceTail)
 .replace(/(^\s+)|(\s+$)/gm, '\n') // allow one empty line & trim each line
 .replace(/(^\s+)|(\s+$)/g, '') // remove heading or tailing \n

const INLINE_TAGS = new Set([
 // Inline text semantics
 'a', 'abbr', 'b', 'bdi', 'bdo', 'br', 'cite', 'code', 'data', 'dfn', 'em', 'i',
 'kbd', 'mark', 'q', 'rp', 'rt', 'rtc', 'ruby', 's', 'samp', 'small',
 'span', 'strong', 'sub', 'sup', 'time', 'u', 'var', 'wbr'
])

/**
* @returns {string}
*/
export function getSelectionSentence () {
 const selection = window.getSelection()
 const selectedText = selection.toString()
 if (!selectedText.trim()) { return '' }

 var sentenceHead = ''
 var sentenceTail = ''

 const anchorNode = selection.anchorNode
 if (anchorNode.nodeType === Node.TEXT_NODE) {
 let leadingText = anchorNode.textContent.slice(0, selection.anchorOffset)
 for (let node = anchorNode.previousSibling; node; node = node.previousSibling) {
 if (node.nodeType === Node.TEXT_NODE) {
 leadingText = node.textContent + leadingText
 } else if (node.nodeType === Node.ELEMENT_NODE) {
 leadingText = node.innerText + leadingText
 }
 }

 for (
 let element = anchorNode.parentElement;
 element && INLINE_TAGS.has(element.tagName.toLowerCase()) && element !== document.body;
 element = element.parentElement
 ) {
 for (let el = element.previousElementSibling; el; el = el.previousElementSibling) {
 leadingText = el.innerText + leadingText
 }
 }

 sentenceHead = (leadingText.match(sentenceHeadTester) || [''])[0]
 }

 const focusNode = selection.focusNode
 if (selection.focusNode.nodeType === Node.TEXT_NODE) {
 let tailingText = selection.focusNode.textContent.slice(selection.focusOffset)
 for (let node = focusNode.nextSibling; node; node = node.nextSibling) {
 if (node.nodeType === Node.TEXT_NODE) {
 tailingText += node.textContent
 } else if (node.nodeType === Node.ELEMENT_NODE) {
 tailingText += node.innerText
 }
 }

 for (
 let element = focusNode.parentElement;
 element && INLINE_TAGS.has(element.tagName.toLowerCase()) && element !== document.body;
 element = element.parentElement
 ) {
 for (let el = element.nextElementSibling; el; el = el.nextElementSibling) {
 tailingText += el.innerText
 }
 }

 sentenceTail = (tailingText.match(sentenceTailTester) || [''])[0]
 }

 return (sentenceHead + selectedText + sentenceTail)
 .replace(/(^\s+)|(\s+$)/gm, '\n') // allow one empty line & trim each line
 .replace(/(^\s+)|(\s+$)/g, '') // remove heading or tailing \n
}