ai-utils.js/model-function/generate-text/extractTextDeltas.js

Build AI applications, chatbots, and agents with JavaScript and TypeScript.

export async function* extractTextDeltas({ deltaIterable, extractDelta, onDone, onError, }) {
    let accumulatedText = "";
    let lastFullDelta;
    for await (const event of deltaIterable) {
        if (event?.type === "error") {
            onError(event.error);
            throw event.error;
        }
        if (event?.type === "delta") {
            lastFullDelta = event.fullDelta;
            const delta = extractDelta(lastFullDelta);
            if (delta != null && delta.length > 0) {
                accumulatedText += delta;
                yield delta;
            }
        }
    }
    onDone(accumulatedText, lastFullDelta);
}