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lokalise-sdk-patterns Apply production-ready Lokalise SDK patterns for TypeScript and Node.js.
Use when implementing Lokalise integrations, refactoring SDK usage,
or establishing team coding standards for Lokalise.
Trigger with phrases like "lokalise SDK patterns", "lokalise best practices",
"lokalise code patterns", "idiomatic lokalise".
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2 fichiers Plus depuis ce dépôt Implement user sign-up and sign-in flows with Clerk.
Use when building authentication UI, customizing sign-in experience,
or implementing OAuth social login.
Trigger with phrases like "clerk sign-in", "clerk sign-up",
"clerk login flow", "clerk OAuth", "clerk social login".
Implement session management and middleware with Clerk.
Use when managing user sessions, configuring route protection,
or implementing token refresh and custom JWT templates.
Trigger with phrases like "clerk session", "clerk middleware",
"clerk route protection", "clerk token", "clerk JWT".
Configure enterprise SSO, role-based access control, and organization management.
Use when implementing SSO integration, configuring role-based permissions,
or setting up organization-level controls.
Trigger with phrases like "clerk SSO", "clerk RBAC",
"clerk enterprise", "clerk roles", "clerk permissions", "clerk organizations".
name lokalise-sdk-patterns description Apply production-ready Lokalise SDK patterns for TypeScript and Node.js.
Use when implementing Lokalise integrations, refactoring SDK usage,
or establishing team coding standards for Lokalise.
Trigger with phrases like "lokalise SDK patterns", "lokalise best practices",
"lokalise code patterns", "idiomatic lokalise".
allowed-tools Read, Write, Edit version 1.14.0 license MIT author Jeremy Longshore <jeremy@intentsolutions.io> tags ["saas","lokalise","typescript","nodejs"] compatibility Designed for Claude Code, also compatible with Codex and OpenClaw
Lokalise SDK Patterns
Overview
Production-grade patterns for @lokalise/node-api: client singleton, cursor pagination, typed error handling, batch operations, upload monitoring, and retry with rate limiting.
Prerequisites
@lokalise/node-api v12+ installedTypeScript 5+ with strict mode
Instructions
Create a client singleton to centralize configuration and support branch-based project IDs.
import { LokaliseApi } from "@lokalise/node-api" ;
let instance : LokaliseApi | null = null ;
export function getClient (apiKey ?: string LokaliseApi {
if (instance) return instance;
const key = apiKey ?? process.env .LOKALISE_API_TOKEN ;
if (!key) throw new Error ("Set LOKALISE_API_TOKEN or pass apiKey" );
instance = new LokaliseApi ({ apiKey : key, enableCompression : true });
return instance;
}
export function resetClient (void { instance = null ; }
export
function
projectId
id : string , branch ?: string
string
return
`${id} :${branch} `
Build a cursor-based pagination helper that works with any paginated endpoint.
interface PaginatedResult <T> {
items : T[];
hasNextCursor (): boolean ;
nextCursor (): string ;
}
type Fetcher <T> = (params : Record <string , unknown > Promise <PaginatedResult <T>>;
export async function * paginate<T>(
fetcher : Fetcher <T>,
baseParams : Record <string , unknown >,
pageSize = 500
): AsyncGenerator <T, void , undefined > {
let cursor : string | undefined ;
let n = 0 ;
do {
const params = { ...baseParams, limit : pageSize, ...(cursor ? { cursor } : {}) };
if (n++ > 0 ) await new Promise ((r ) => setTimeout (r, 170 ));
const page = await fetcher (params);
for (const item of page.items ) yield item;
cursor = page.hasNextCursor () ? page.nextCursor () : undefined ;
} while (cursor);
}
export async function paginateAll<T>(fetcher : Fetcher <T>, params : Record <string , unknown >): Promise <T[]> {
const out : T[] = [];
for await (const item of paginate (fetcher, params)) out.push (item);
return out;
}
const allKeys = await paginateAll (
(p ) => client.keys ().list (p),
{ project_id : "123456.abcdef" , include_translations : 1 }
);
Wrap API calls with structured error handling that classifies retryable errors.
export class LokaliseError extends Error {
constructor (
message : string ,
public readonly statusCode : number ,
public readonly isRetryable : boolean
) {
super (message);
this .name = "LokaliseError" ;
}
}
export async function apiCall<T>(fn : () => Promise <T>): Promise <T> {
try {
return await fn ();
} catch (err : unknown ) {
if (err && typeof err === "object" && "code" in err) {
const e = err as { code : number ; message : string };
throw new LokaliseError (e.message , e.code , e.code === 429 || e.code >= 500 );
}
throw err;
}
}
try {
const keys = await apiCall (() => client.keys ().list ({ project_id : pid, limit : 500 }));
} catch (err) {
if (err instanceof LokaliseError && err.isRetryable ) {
console .log ("Transient failure, safe to retry" );
}
}
Batch key operations that chunk requests to respect the 500-key-per-request limit.
function chunk<T>(arr : T[], size : number ): T[][] {
const out : T[][] = [];
for (let i = 0 ; i < arr.length ; i += size) out.push (arr.slice (i, i + size));
return out;
}
export async function batchCreateKeys (
client : LokaliseApi , projectId : string ,
keys : Array <{ key_name: { web: string }; platforms: string []; tags?: string [];
translations?: Array <{ language_iso: string ; translation: string }> }>
): Promise <{ created : number ; errors : Error [] }> {
const batches = chunk (keys, 500 );
let created = 0 ;
const errors : Error [] = [];
for (let i = 0 ; i < batches.length ; i++) {
try {
const r = await client.keys ().create ({ project_id : projectId, keys : batches[i] });
created += r.items .length ;
} catch (err) { errors.push (err as Error ); }
if (i < batches.length - 1 ) await new Promise ((r ) => setTimeout (r, 500 ));
}
return { created, errors };
}
export async function batchDeleteKeys (
client : LokaliseApi , projectId : string , keyIds : number []
): Promise <number > {
const batches = chunk (keyIds, 500 );
let deleted = 0 ;
for (let i = 0 ; i < batches.length ; i++) {
const r = await client.keys ().bulk_delete (batches[i], { project_id : projectId });
deleted += r.keys_removed ;
if (i < batches.length - 1 ) await new Promise ((r ) => setTimeout (r, 500 ));
}
return deleted;
}
Upload files with async process monitoring and progress callbacks.
import { readFileSync } from "node:fs" ;
export async function uploadWithProgress (
client : LokaliseApi , projectId : string ,
opts : { filePath: string ; langIso: string ; tags?: string [];
replaceModified?: boolean ; cleanupMode?: boolean },
onProgress ?: (status: string , elapsedMs: number ) => void
): Promise <{ processId : string ; status : string ; durationMs : number }> {
const data = readFileSync (opts.filePath ).toString ("base64" );
const start = Date .now ();
const proc = await client.files ().upload (projectId, {
data,
filename : opts.filePath .split ("/" ).pop ()!,
lang_iso : opts.langIso ,
replace_modified : opts.replaceModified ?? true ,
cleanup_mode : opts.cleanupMode ?? false ,
detect_icu_plurals : true ,
tags : opts.tags ,
});
onProgress?.("queued" , Date .now () - start);
const maxWait = 120_000 ;
let last = proc.status ;
while (Date .now () - start < maxWait) {
await new Promise ((r ) => setTimeout (r, 1500 ));
const check = await client.queuedProcesses ().get (proc.process_id , { project_id : projectId });
if (check.status !== last) { last = check.status ; onProgress?.(last, Date .now () - start); }
if (check.status === "finished" ) return { processId : proc.process_id , status : "finished" , durationMs : Date .now () - start };
if (check.status === "cancelled" || check.status === "failed" ) throw new Error (`Upload ${check.status} : ${JSON .stringify(check.details)} ` );
}
throw new Error (`Upload timed out after ${maxWait} ms` );
}
await uploadWithProgress (client, "123456.abcdef" , {
filePath : "./src/locales/en.json" ,
langIso : "en" ,
tags : ["ci" ],
replaceModified : true ,
}, (status, ms ) => console .log (`[${(ms / 1000 ).toFixed(1 )} s] ${status} ` ));
Add a retry decorator with exponential backoff and a rate limiter for sequential calls.
export async function withRetry<T>(
fn : () => Promise <T>,
opts : { maxRetries ?: number ; baseDelayMs ?: number ; maxDelayMs ?: number ;
onRetry ?: (attempt : number , err : Error , delayMs : number void } = {}
): Promise <T> {
const { maxRetries = 3 , baseDelayMs = 1000 , maxDelayMs = 10_000 , onRetry } = opts;
let lastErr : Error | undefined ;
for (let i = 0 ; i <= maxRetries; i++) {
try { return await fn (); }
catch (err : unknown ) {
lastErr = err as Error ;
const code = (err as { code ?: number })?.code ;
if (!(code === 429 || (code && code >= 500 )) || i === maxRetries) throw err;
const delay = Math .min (baseDelayMs * 2 ** i + Math .random () * 200 , maxDelayMs);
onRetry?.(i + 1 , lastErr, delay);
await new Promise ((r ) => setTimeout (r, delay));
}
}
throw lastErr;
}
export function rateLimited<A extends unknown [], R>(
fn : (...args : A ) => Promise <R>, minMs = 170
): (...args : A ) => Promise <R> {
let last = 0 ;
return async (...args) => {
const wait = minMs - (Date .now () - last);
if (wait > 0 ) await new Promise ((r ) => setTimeout (r, wait));
last = Date .now ();
return fn (...args);
};
}
const keys = await withRetry (
() => client.keys ().list ({ project_id : pid, limit : 500 }),
{ onRetry : (n, e, ms ) => console .warn (`Retry ${n} : ${e.message} (${ms} ms)` ) }
);
const listKeys = rateLimited ((p : Record <string , unknown > client.keys ().list (p));
const p1 = await listKeys ({ project_id : pid, page : 1 , limit : 100 });
const p2 = await listKeys ({ project_id : pid, page : 2 , limit : 100 });
Output
Singleton client with compression and branch support
Async generator for memory-efficient cursor pagination
Type-safe error wrapper with isRetryable classification
Batch create/delete respecting 500-key API limit
File upload with process polling and progress callbacks
Retry with exponential backoff + rate limiter at 6 req/sec
Error Handling Pattern When to Use Behavior apiCall()Every SDK call Converts to typed LokaliseError with isRetryable withRetry()Rate limits or transient failures Exponential backoff, retries 429 and 5xx only rateLimited()Sequential bulk calls Enforces 170ms minimum spacing paginate()Fetching all keys/translations Built-in 170ms delay between pages batchCreateKeys()Creating > 500 keys 500-key chunks with 500ms spacing uploadWithProgress()File uploads Polls process status with 2-minute timeout
Examples
Combining All Patterns import { getClient, projectId } from "./lib/lokalise-client" ;
import { paginateAll } from "./lib/paginate" ;
import { withRetry } from "./lib/retry" ;
import { batchCreateKeys } from "./lib/batch" ;
import { uploadWithProgress } from "./lib/upload" ;
const client = getClient ();
const pid = projectId ("123456.abcdef" , "develop" );
await uploadWithProgress (client, pid, { filePath : "./src/locales/en.json" , langIso : "en" },
(s, ms ) => console .log (`[${ms} ms] ${s} ` ));
const allKeys = await paginateAll ((p ) => client.keys ().list (p), { project_id : pid });
console .log (`${allKeys.length} keys` );
const result = await batchCreateKeys (client, pid,
Array .from ({ length : 1200 }, (_, i ) => ({
key_name : { web : `gen.key_${i} ` }, platforms : ["web" ],
translations : [{ language_iso : "en" , translation : `Val ${i} ` }],
})));
console .log (`Created ${result.created} , errors: ${result.errors.length} ` );
const bundle = await withRetry (() => client.files ().download (pid, {
format : "json" , original_filenames : false , bundle_structure : "%LANG_ISO%.json" ,
}));
console .log (`Download: ${bundle.bundle_url} ` );
Resources
Next Steps Apply these patterns in lokalise-core-workflow-a and lokalise-core-workflow-b for real-world usage.
