Fix Promise Pending JavaScript Async Await Utilities
Ready-to-use JavaScript utilities to fix why does my JavaScript async await function return promise pending instead of data issues with practical code solutions.
Fix Promise Pending JavaScript Async Await Utilities
When you're asking why does my JavaScript async await function return promise pending instead of data, these utility functions will help you debug and fix the issue quickly. Use these ready-to-use code snippets to handle async/await problems effectively.
Promise State Detection Utilities #
Check if Value is Pending Promise #
Promise State Inspector #
// Advanced promise state detection utility
function inspectPromiseState(promise) {
if (!(promise instanceof Promise)) {
return { isPromise: false, value: promise };
}
let state = 'pending';
let value = undefined;
// Check if promise is resolved/rejected
promise.then(
(resolved) => { state = 'resolved'; value = resolved; },
(rejected) => { state = 'rejected'; value = rejected; }
);
return { isPromise: true, state, value };
}
Async Function Wrapper Utilities #
Safe Async Executor #
Async Function Validator #
// Utility to validate and fix async function calls
function validateAsyncCall(fn, ...args) {
if (typeof fn !== 'function') {
throw new Error('First parameter must be a function');
}
const result = fn(...args);
if (result instanceof Promise) {
console.log('✓ Function correctly returns Promise');
return result;
} else {
console.warn('⚠ Function does not return Promise, wrapping...');
return Promise.resolve(result);
}
}
Promise Resolution Utilities #
Force Promise Resolution #
Batch Promise Resolver #
// Utility to resolve multiple promises and handle pending states
async function batchResolvePromises(promiseArray, options = {}) {
const { timeout = 10000, failFast = false } = options;
const resolveWithTimeout = (promise) => {
return Promise.race([
promise,
new Promise((_, reject) =>
setTimeout(() => reject(new Error('Timeout')), timeout)
)
]);
};
if (failFast) {
return Promise.all(promiseArray.map(resolveWithTimeout));
} else {
return Promise.allSettled(promiseArray.map(resolveWithTimeout));
}
}
Debugging Helper Utilities #
Async Function Debugger #
Promise Chain Analyzer #
// Utility to analyze promise chains and detect pending issues
function analyzePromiseChain(promise) {
const analysis = {
isPromise: promise instanceof Promise,
chainLength: 0,
hasHandlers: false,
timestamp: Date.now()
};
if (analysis.isPromise) {
// Check if promise has then/catch handlers
analysis.hasHandlers = promise.then !== Promise.prototype.then ||
promise.catch !== Promise.prototype.catch;
// Add debugging then handler
promise.then(
(value) => console.log('Promise resolved with:', value),
(error) => console.log('Promise rejected with:', error)
);
}
return analysis;
}
Error Recovery Utilities #
Async Error Recovery #
Usage Instructions #
Basic Promise Pending Fix #
- Identify the issue: Use
isPromisePending()
to check if your function returns a pending promise - Debug execution: Wrap your function with
debugAsyncFunction()
to see execution flow - Safe execution: Use
safeAsyncExecute()
to handle the async function properly - Error recovery: Implement
asyncWithRecovery()
for robust error handling
Integration Example #
// Complete solution for fixing promise pending issues
async function fixPromisePendingIssue(problemFunction, ...args) {
// Step 1: Debug the function
const debuggedFn = debugAsyncFunction(problemFunction, 'ProblemFunction');
// Step 2: Execute safely with error recovery
const result = await asyncWithRecovery(
() => debuggedFn(...args),
'Default value',
2
);
// Step 3: Validate final result
if (isPromisePending(result)) {
console.error('Still returning pending promise after fixes!');
return await forceResolve(result);
}
return result;
}
These utilities solve the common question "why does my JavaScript async await function return promise pending instead of data" by providing robust debugging, error recovery, and promise handling mechanisms.