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I had some issues getting the v3 AWS SDK for JavaScript to communicate with localstack S3, but I found a solution! With the V2 JS SDK, the configuration object for the S3 client looks like: { "region": "eu-west-1", "endpoint": "http://localhost:4566", "s3ForcePathStyle": true } The last field tells the sdk not to use .hostname style connections, and instead puts the bucket in the path. For local..

The promise will always log pending as long as its results are not resolved yet. You must call .then on the promise to capture the results regardless of the promise state (resolved or still pending): let AuthUser = function(data) { return google.login(data.username, data.password).then(token => { return token } ) } let userToken = AuthUser(data) console.log(userToken) // Promise { } userToken.th..

filters: { currency: function(value) { return Number.parseFloat(value).toFixed(2); } } // defined out of main component // ex: Vue.filter('currency', function() { }) // They can be chained // filters are available in any v-bind

//HTML //we can programically modify the styles

Integration Tests -> AWS This was used to be, but we don't want it to be Now: Unit No local dependency Files: logic.js schema.js Integration Manage only internal dependency Any Database We are not gonna make any Http or Axios (Works well with our database) Files: action.js E2E Observability Observe what's in the Cloud Our Files: logic.js business logic / Rules >> Unit Test (Deterministic) ex: Ex..

Javascript Scheduling: setTimeout and setInterval A block of JavaScript code is generally executed synchronously. But there are some JavaScript native functions (timers) which allow us to delay the execution of arbitrary instructions. setTimeout() setInterval() These let you run a piece of JavaScript code at some point in the future. That’s called “scheduling a call”. In this tutorial I’ll expla..

7 Types of Native Errors in JavaScript You Should Know Understand the common types of native errors in JavaScript. We see errors everywhere, from our browser console to the terminal of our machine running Node.js. This post focuses on outlining the types of errors that we may encounter during JS development. Tip: Good errors make the difference between a fast and painless developing-experience a..

The Child Processes Module We can easily spin a child process using Node’s child_process module and those child processes can easily communicate with each other with a messaging system. The child_process module enables us to access Operating System functionalities by running any system command inside a, well, child process. We can control that child process input stream, and listen to its output..

Map The Map object holds key-value pairs and remembers the original insertion order of the keys. Any value (both objects and primitive values) may be used as either a key or a value. Description A Map object iterates its elements in insertion order — a for...of loop returns an array of [key, value] for each iteration. Key equality Key equality is based on the sameValueZero algorithm. NaN is cons..

! is the logical negation or "not" operator. !! is ! twice. It's a way of casting a "truthy" or "falsy" value to true or false, respectively. Given a boolean, ! will negate the value, i.e. !true yields false and vice versa. Given something other than a boolean, the value will first be converted to a boolean and then negated. For example, !undefined will first convert undefined to false and then ..