Trying to grasp the concepts of Slate.js, I delved into the rich text example. Within it, I encountered a code snippet that has left me puzzled.
const isBlockActive = (editor, format) => {
const [match] = Editor.nodes(editor, {
match: n => n.type === format,
})
return !!match
}
As someone unfamiliar with advanced JavaScript and new to TypeScript and slate.js, I must admit my limitations in articulating my question. Here's what I've gathered so far and where I'm seeking clarity:
(1) Editor.nodes() is said to be a method that returns an Iterable. What exactly does the notation "const [match]" signify? Is this syntax native to JavaScript or TypeScript?
(2) Does the "
matchCondition in "<code>const [match]matchCondition : n => n.type === formatconst [match]" forms an array containing a singular function element? This notion seems peculiar as it questions the necessity of Editor.nodes() returning an Iterable at all.
(3) I understand that double exclamation points yield a Boolean value. However, given my struggle to ascertain whether 'matchCondition' is a function, an iterable, or perhaps something else entirely, I am uncertain about what truth or falsehood regarding `!!matchCondition` actually conveys concerning the initial iterable outputted by Editor.nodes().
I appreciate any elucidation you may provide to dispel the confusion clouding my mind!