Javascript: How to specify http method with AWS Lambda.invoke()?

Question

From AWS documentation: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Lambda.html#invoke-property

var params = {
   FunctionName: 'STRING_VALUE', /* required */
   ClientContext: 'STRING_VALUE',
   InvocationType: Event | RequestResponse | DryRun,
   LogType: None | Tail,
   Payload: Buffer.from('...') || 'STRING_VALUE',
   Qualifier: 'STRING_VALUE'
};
lambda.invoke(params, function(err, data) {
   if (err) console.log(err, err.stack); // an error occurred
   else     console.log(data);           // successful response
});

How do I specify http method, e.g. GET, POST, PUT, DELETE when calling lambda.invoke()?

Answer 1

• We should add Flag as the useEffect dependency, otherwise useEffect won't know the Flag is changed to 1.

• We should store the setInterval timer to Ref variable

     const timer = useRef();
     const [seconds, setSeconds] = useState(0);
     const [Flag, setFlag] = useState(0);
  
     function inc() {
       setSeconds((seconds) => seconds + 1);
       setFlag(1);
     }
  
     useEffect(() => {
       if (Flag === 1) {
         if (timer.current) {
           clearInterval(timer.current);
         }
       } else {
         timer.current = setInterval(inc, 1000);
       }
     }, [Flag]);
  

Answer 2

Why it is not stopping is simple: useEffect callback runs only once (because empty dependency array makes it behave like componentDidMount). When that is run Flag is 0, so clearInterval is not run.