polyfill for call

ByAnurag batra October 1, 2022September 6, 2022

Function.prototype.myCall = function (...args) {
  let obj = args[0]
  const params = args.slice(1)

  obj = {
    ...obj,
    fn: this
  }

  return obj.fn(...params)
}

Here is what the above code is Doing:
1. We’re creating a new object and assigning it to the first argument passed to myCall.
2. We’re adding a new property to the object called fn and assigning it to the function that myCall was called on.
3. We’re invoking the function and passing in the remaining arguments.

Javascript Examples

js background

ByAnurag batra July 1, 2022June 30, 2022

document.body.style.background = “#f3f3f3 url(‘img_tree.png’) no-repeat right top”; Here is what the above code is Doing: 1. The first line is a comment. Comments are ignored by the browser. 2. The second line is a JavaScript statement which changes the text in the element: document.getElementById(“demo”).innerHTML = “Hello JavaScript”; 3. The third line is a JavaScript statement…

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

chart js x axis data bar

ByAnurag batra October 1, 2022September 6, 2022

data: { datasets: [{ barPercentage: 0.5, barThickness: 6, maxBarThickness: 8, minBarLength: 2, data: [10, 20, 30, 40, 50, 60, 70] }] }; Here is what the above code is Doing: 1. We’re creating a new Chart object. 2. We’re adding data to that chart object. 3. We’re telling the chart object that we want a…

Javascript Examples

what is dispatch in redux

ByAnurag batra October 4, 2022September 6, 2022

redux function that dispatches an action which is then sent to reducers which change state based on that action Here is what the above code is Doing: 1. We’re importing the action type from the action file 2. We’re importing the axios library to make a request to the API 3. We’re importing the redux-thunk…

Javascript Examples

express get raw path

ByAnurag batra October 2, 2022September 6, 2022

const url = require(‘url’); const express = require(‘express’); const app = express(); app.use((req, res, next) => { const path = url.parse(req.url).path; // Do something… }); const port = 3000; app.listen(port, console.log(`Listening on port ${port}.`)); Here is what the above code is Doing: 1. We’re requiring the url module. 2. We’re creating an express app. 3….

how to check if object exists in javascript

Javascript Examples

how to check if object exists in javascript

ByAnurag batra July 13, 2022June 30, 2022

if (typeof maybeObject != “undefined”) { alert(“GOT THERE”); } Here is what the above code is Doing: 1. It’s creating a variable called maybeObject. 2. It’s assigning the value of the variable to the result of the function. 3. It’s checking to see if the variable is undefined. 4. If it’s not undefined, it’s alerting…

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