In this chapter, I explain some of the techniques I use to create better JavaScript. This is not a language guide, and I won't be demonstrating any code hacks or tweaks. My coding preferences are your maintenance nightmares, and vice versa. I have seen otherwise mild-mannered people end ...
Sometimes you want to ensure that a RegExp pattern starts immediately after a specific string but you don't want to include those characters in the match. In these cases, a lookbehind expression comes in handy. …read more Rounding a number to a specific precision in JavaScript 2020-09-13...
So I wrote Understanding Bits, Bytes, Bases, and Writing a Hex Dump in JavaScript which goes over much of that. To summarize, there are two major takeaways of that article: Bits and Bytes - A bit is a binary digit - 0 or 1, true or false, on or off. Eight bits is a byte, ...
TypeScript defines functions in the normal way: function print(obj: {label: string}) { console.log(obj.label); } let foo = {size: 10, label: "这是foo, 10斤"}; print(foo); TypeScript interface way to define functions: interface labelInterface { ...
Suites A suit is the starting point of a Jasmine test cases, it actually calls the global jasmine function describe. It can have two parameters, a string value which describes the suit, and a function which implements the suit. Spec Like suites, a spec starts with a string ...
dynamically generated HTML is through the use ofHTMLElement.innerHTMLandtoStaticHTML. This allows the highly optimized HTML parser to interpret the string and add it to the DOM. As you add a larger number of elements to the DOM, this can make a proportionally larger improvement in performance...
A synchronizing function that runs when these changes happen. I will call this function thehandler()from now on. The above steps are implemented in different ways by the different data binding techniques. The upcoming sections will be about two such techniques, namely dirty checking and the acces...
that bit of JavaScript functionality that started out as just a handful of lines grows to a dozen, then two dozen, then more. Along the way, a function picks up a few more arguments; a conditional picks up a few more conditions. And then one day, the bug report comes in: something’...
The main difference with Sass is that it's written in a functional style and all color functions are curried. This means you can compose them together into your own reusable helpers with acomposefunction of your choice: import{compose}from'ramda'// Replace with any compose() function of your...
The writer function should accept a single argument - the string to encode, and must return a JavaScript array of unsigned byte values representing that string in the specified encoding. Supported Encodings The following encodings are supported by default: ...