2023-05-03
3594
#html
Glad Chinda
1855
May 3, 2023 ⋅ 12 min read

Programmatically downloading files in the browser

Glad Chinda Full-stack web developer learning new hacks one day at a time. Web technology enthusiast. Hacking stuffs @theflutterwave.

Recent posts:

Using Defer In Angular 17 To Implement Lazy Loading

Using defer in Angular 17 to implement lazy loading

Angular’s new `defer` feature, introduced in Angular 17, can help us optimize the delivery of our apps to end users.

Lewis Cianci
Dec 4, 2023 ⋅ 10 min read

Using ElectricSQL to build a local-first application

ElectricSQL is a cool piece of software with immense potential. It gives developers the ability to build a true local-first application.

Rahul Padalkar
Dec 1, 2023 ⋅ 11 min read
Using Rust And Leptos To Build Beautiful Declarative User Interfaces

Using Rust and Leptos to build beautiful, declarative UIs

Leptos is an amazing Rust web frontend framework that makes it easier to build scalable, performant apps with beautiful, declarative UIs.

Eze Sunday
Nov 30, 2023 ⋅ 10 min read
5 Best JavaScript Multi-Dimensional Array Libraries

5 best JavaScript multidimensional array libraries

Learn more about the 5 best JavaScript libraries for dealing with multidimensional arrays, such as ndarray, math.js, and NumJs.

Pascal Akunne
Nov 30, 2023 ⋅ 4 min read
View all posts

5 Replies to "Programmatically downloading files in the browser"

  1. Hello. Great article! One comment though: in the function `downloadBlob` you declare a `clickHandler` that gets a value of an arrow function, which uses the `this` keyword. Since arrow functions do not have `this`, and you use `this` in a `setTimeout` callback function — it ends up being `undefined`, which throws when you perform the `.` operator on it (to call the `removeEventListener` method).
    Thanks for the article!
    Eran

  2. Hi Eran, thanks for pointing that out. That was an error on my part.

    The `clickHandler` function is supposed to be a regular JS function as opposed to an arrow function — that way, it would have the correct `this` binding internally (the target element) when it is eventually used as an event listener callback. If you notice in the subsequent Codepen snippets, you’d observe that the `clickHandler` function was defined as a regular function instead of as an arrow function.

    Thanks again for spotting that out.

Leave a Reply