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 maintenanc
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 web entrypoint uses the same cycle function as the terminal implementation, but has a function to fetch each ROM and reset the display every time a new one is selected. I'm used to working with json data and fetch, but in this case I fetched the raw arrayBuffer from the response. ...
This was not only the to-go approach for asynchronous execution but a core pattern and convention of its ecosystem. Node.js opened a new era of writing JavaScript in a different environment — even outside the web. As a consequence, other asynchronous situations were possible, like creating ne...
functionaddMonthToDate(month,date){// ...}constdate=newDate()addMonthToDate(1,date) 使用默认变量替代短路运算或条件 Bad: functioncreateMicrobrewery(name){constbreweryName=name||'Hipster Brew Co.'// ...} Good: functioncreateMicrobrewery(breweryName='Hipster Brew Co.'){// ...} ...
Thedigest()function needs to be run from time to time to ensure a synchronized state. The accessor technique The accessor technique is the now trending one. It is a bit less widely supported as it requires the ES5 getter/setter functionality, but it makes up for this in elegance. ...
How to use a for…of loop on Generators Within JavaScript, generators are iterable objects, so you can utilize a for…of loop to iterate over them. For this example, we will write an incredibly straightforward generator called “sampleGenerator()“. This is defined by using “function“, fol...
writing a javascript module ready for ES6 import javascript模块化是一个比较大也是比较容易混淆的topic.通常几乎所有的第三方Library都支持CMD,AMD,ES6,Global object方式来引用lib所暴露出来的服务。 那么如果我们希望自己写一个lib,并且作为模块能被其他模块自由引用应该怎么写呢?
Complex functions; if a function is more than 10 lines, like the submit handler, it’s highly likely that it’s doing too much. Hidden or shared state; for example, sincependingis in a closure, there’s no way to test whether the pending state is set correctly. ...
InJavaScript, arrays and objects are passed by reference rather than value, and they are mutable. This means that when you pass an object or an array as a parameter into a function, both your code and the function you passed the object or array to have the ability to alter the same ins...