随笔分类 - Javascript
摘要：Functor laws: 1. Identity: 2. Composition: Natural Transformations: "Takes one functor to another without knowing anything about the value".
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摘要：EventStream: You can use RxJS, BaconJS or any reactive programming lib you want: Here using BaconJS; we need to call onValue to subscribe stream. Futu
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摘要：IO functor doesn't like Maybe(), Either() functors. Instead of get a value, it takes a function. API: Examples:
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摘要：Jest comes pre-packaged with the ability to track code coverage for the modules you're testing, but it takes a little extra work to make it track unte
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摘要：Either Functor: Examples:
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摘要：In normal Javascript, we do undefine check or null check: Sometime backend data return may contain or not contain 'name' prop. So let's see how to def
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摘要：Well, this stuff will be a little bit strange if you deal with it first time. Container Object: Just a wrapper / contianer for values No Method No Nou
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摘要：Let's learn how to unit test your JavaScript with Jest, a JavaScript unit testing framework from Facebook. We'll install and optimize Jest for this pr
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摘要：Canvas is great for high performance graphics rendering but by default the results look blocky on phones tablets and laptops with high pixel density o
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摘要：Learn how to use the new Webpack Dashboard from Formidable Labs to display a pretty, useful output for monitoring the status of your webpack builds. T
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摘要：Not only can you provide default values when using ES6 parameter object destructuring, but you can also require the presence of certain properties. No
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摘要：Often buttons need to be handled by JavaScript, and if done improperly it can lead to accessibility issues. In this lesson you will improve a major ne
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摘要：let person = { firstName: "Zhentian", lastName: "Wan" }; /*Object.freeze() makes object cannot be updated, added or deleted*/ let freezePerson = Object.freeze(person); freezePerson.address="Finl...
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摘要：Use map() and Number() to convert to number if possilbe or NaN.
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摘要：In this lesson we look at using color and the basic drawing methods of p5js, and how they can be combined to create a simple graphic on the canvas.
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摘要：If you’re only instrumenting the files in your project that are under test then your code coverage report will be misleading and it will be difficult
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摘要：How much of your code runs during unit testing is an extremely valuable metric to track. Utilizing code the karma-coverage plugin and babel-plugin-__c
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摘要：When writing tests run by Karma for an application that’s bundled with webpack, it’s easiest to integrate webpack and Karma directly together. In this
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摘要：When you have a dependency that has dependencies on global variables (like jQuery or lodash) or assumes that this is bound to window, you can use the
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摘要：Let's try creating a deeper tree structure. This time we have 4 separate arrays each containing lists, videos, boxarts, and bookmarks respectively. Ea
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