AWS serverless documentation Authorization Using API Gateway blog Iam Role Events handled by CreateSocket labmda: Connect Do Not Message the
API Gateway vs ALB to invoke lambda
AWS API Gateway vs. Application Load Balancer (ALB)
Step Function and Cloudwatch Log
https://www.davehall.com.au/blog/2020/07/10/logging-step-functions-cloudwatch/ AWSTemplateFormatVersion: ‘2010-09-09’ Description: StepFunction with Logging Example. Parameters: Resources: StepFunctionExecRole: Type: AWS::IAM::Role Properties: AssumeRolePolicyDocument: Version: ‘2012-10-17’ Statement: – Effect:
Timestamp and Timezone
https://stackoverflow.com/questions/38077862/how-to-tell-javascript-date-where-to-take-timezoneoffset-from The definition of UNIX timestamp is time zone independent. The UNIX timestamp is the number of seconds (or milliseconds)
IndexedDB
Shortfall of local storage – Only store string data in localStorage, which are susceptible to XSS attacks, and it does
Lambda Cache
https://katiyarvipinknp.medium.com/how-to-cache-the-data-in-aws-lambda-function-using-node-js-use-tmp-storage-of-aws-lambda-2c7e1e01d923 const cachedItem = {}; // as you know, anything declared outside the event handler function is reused between invocations.
SQS subscribes to SNS topic
Resources: SNSTopic: Type: AWS::SNS::Topic Properties: TopicName: name KmsMasterKeyId: !ImportValue kms-key-id SQSQueue: Type: AWS::SQS::Queue SNSSubscription: Type: AWS::SNS::Subscription Properties: TopicArn: !Ref SNSTopicArn
Step function notes
Use step function to delay sns { “StartAt”: “Delay”, “Comment”: “Publish to SNS with delay”, “States”: { “Delay”: { “Type”:
REACT interview questions
What is “prop drilling” and how to prevent it pass the state as “props” through each nested component UseContext hook
React Hooks
Hooks can only be called inside React function components. Hooks can only be called at the top level of a