| interface HProps { |
| index: number |
| id: string |
| } |
|
|
| export const H = ({ index, id, ...props }: HProps) => { |
| const getHighlightedWords = (): [ |
| targetIndex: number[], |
| allHighlightWords: Element[], |
| ] => { |
| const codeBlock = document.getElementById(id) |
| if (!codeBlock) return [[], []] |
|
|
| const allHighlightWords = codeBlock.querySelectorAll( |
| '.highlight-word' |
| ) as unknown as Element[] |
| const targetIndex = [index - 1] |
|
|
| if (Math.max(...targetIndex) >= allHighlightWords.length) return [[], []] |
| else return [targetIndex, allHighlightWords] |
| } |
|
|
| const handleMouseEnter = () => { |
| const [targetIndex, allHighlightWords] = getHighlightedWords() |
|
|
| targetIndex.forEach(i => allHighlightWords[i].classList.add('on')) |
| } |
|
|
| const handleMouseLeave = () => { |
| const [targetIndex, allHighlightWords] = getHighlightedWords() |
| targetIndex.forEach(i => allHighlightWords[i].classList.remove('on')) |
| } |
|
|
| return ( |
| <code |
| onMouseLeave={handleMouseLeave} |
| onMouseEnter={handleMouseEnter} |
| style={{ |
| cursor: 'pointer', |
| }} |
| {...props} |
| /> |
| ) |
| } |
|
|
