async await mongoose connection

ByAnurag batra September 26, 2022September 6, 2022

(async () => {
  try {
    await mongoose.connect(dbURI, dbOptions)
  } catch (err) {
    console.log('error: ' + err)
  }
})()

Here is what the above code is Doing:
1. We’re importing the mongoose module and assigning it to a variable called mongoose.
2. We’re importing the dbURI and dbOptions variables from the config.js file.
3. We’re creating a new Mongoose connection using the mongoose.connect() method.
4. We’re wrapping the mongoose.connect() method in an async function and calling it immediately.

Javascript Examples

react dynamic load script

ByAnurag batra October 18, 2022October 23, 2022

function loadScript(src: string): void { const tag = document.createElement(‘script’) tag.async = false tag.src = src tag.type = “module” // if it’s a module document.body.appendChild(tag) } Here is what the above code is Doing: 1. It’s creating a script tag 2. It’s setting the src attribute to the URL of the script we want to load…

Javascript Examples

install emailjs npm

ByAnurag batra July 6, 2022June 30, 2022

npm install emailjs-com –save Here is what the above code is Doing: 1. We’re importing the emailjs module. 2. We’re importing the emailjs-com module. 3. We’re creating a new emailjs object. 4. We’re creating a new emailjs-com object. 5. We’re creating a new emailjs service object. 6. We’re creating a new emailjs template object. 7….

Javascript Examples

javascript average of arguments

ByAnurag batra July 19, 2022June 30, 2022

const average = (…args) => args.reduce((a, b) => a + b) / args.length; // Example average(1, 2, 3, 4); // 2.5 Here is what the above code is Doing: 1. The spread operator (…) is used to pass in an array of arguments to the function. 2. The reduce() method is used to find the…

Javascript Examples

d3 force simulation

ByAnurag batra October 8, 2022September 6, 2022

var width = 600, height = 400; var colorScale = [‘orange’, ‘lightblue’, ‘#B19CD9’]; var xCenter = [100, 300, 500] var numNodes = 100; var nodes = d3.range(numNodes).map(function(d, i) { return { radius: Math.random() * 25, category: i % 3 } }); var u = d3.select(‘svg g’) .selectAll(‘circle’) .data(nodes); var enter = u.enter() .append(‘circle’) .attr(‘r’, function(d)…

how to read write object to localStorage in js

Javascript Examples

how to read write object to localStorage in js

ByAnurag batra October 17, 2022September 6, 2022

var testObject = { ‘one’: 1, ‘two’: 2, ‘three’: 3 }; // Put the object into storage localStorage.setItem(‘testObject’, JSON.stringify(testObject)); // Retrieve the object from storage var retrievedObject = JSON.parse(localStorage.getItem(‘testObject’)); console.log(‘retrievedObject: ‘, retrievedObject); Here is what the above code is Doing: 1. We create a JavaScript object. 2. We stringify the object and store it in…

Javascript Examples

express req ip address

ByAnurag batra July 5, 2022June 30, 2022

const ip = req.headers[‘x-forwarded-for’] || req.connection.remoteAddress; Here is what the above code is Doing: 1. We’re importing the express module and assigning it to the variable express. 2. We’re creating an instance of express and assigning it to the variable app. 3. We’re creating a route for the root URL (/) or home page. 4….

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