slice

function Delta.slice<T>(ops: Delta<T>, start: number, end?: number): Delta<T>

Returns a portion of the delta from start to end.

Example

data-first

import { Delta } from "@monstermann/delta";

const delta = Delta.insert([], "Hello world");

Delta.slice(delta, 0, 5);
// [{ type: "insert", value: "Hello" }]

Delta.slice(delta, 6);
// [{ type: "insert", value: "world" }]

const formatted = pipe(
    [],
    Delta.insert("Hello", { bold: true }),
    Delta.insert(" world", { italic: true }),
);

Delta.slice(formatted, 3, 8);
// [{ type: "insert", value: "lo", attributes: { bold: true } },
//  { type: "insert", value: " wo", attributes: { italic: true } }]

data-last

import { Delta } from "@monstermann/delta";

pipe(
    [],
    Delta.insert("Hello world"),
    Delta.slice(0, 5)
);
// [{ type: "insert", value: "Hello" }]

pipe(
    [],
    Delta.insert("Hello world"),
    Delta.slice(6)
);
// [{ type: "insert", value: "world" }]