随笔分类 - Javascript
摘要：1. Use a for loop to traverse the videos and bookmarks array at the same time. For each video and bookmark pair, create a {videoId, bookmarkId} pair a
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摘要：Three ways to make object immutable: 1. Use JSON.parse(JSON.stringify(obj)): this approach is little bit expense. 2. Use Object.create() This is a che
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摘要：concatAll: Exercise 12: Retrieve id, title, and a 150x200 box art url for every video You've managed to flatten a tree that's two levels deep, let's t
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摘要：fetch() does the same thing as XHR, but fetch return a promise. Check the reponse API here: Link Besides text(), you can use json() or blob(). 'no-cor
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摘要：You can fine tune several webpack plugins to make your bundle as small as it can be for your specific application. However there are a few things you
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摘要：When you have a dependency that does not export itself properly, you can use the exports-loader to force it to export the pieces of the file that you
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摘要：If you have a multi-page application (as opposed to a single page app), you’re likely sharing modules between these pages. By chunking these common mo
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摘要：Often, you have dependencies which you rarely change. In these cases, you can leverage the CommonsChunkPlugin to automatically put these modules in a
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摘要：Leveraging the browser cache is an important part of page load performance. A great way to utilize this cache is by versioning your resources. In this
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摘要：As a Single Page Application grows in size, the size of the payload can become a real problem for performance. In this lesson, learn how to leverage c
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摘要：If you're going to use code splitting with Webpack 2, you'll need to make sure the browser has support for the ES6 Promise API. This means that if you
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摘要：The less code you can send to the browser, the better. The concept of tree shaking basically says that if you’re not using some piece of code, then ex
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摘要：It’s quite common to make a mistake while developing your webpack configuration. A simple typo can cost you hours of development time. With webpack-va
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摘要：There are several lessons that will build on top of this project. It is a fairly standard, small webpack bundled project. In this lesson we’ll explore
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摘要：slice filter map ...spread concat Object.assign
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摘要：delete keyword doesn't actually delete the value but just the reference. So here, what actually delete is the point of me.name: So the point from 'anm
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摘要：First, what is 'High Order function', basic just a function, inside the function return another fuction. For example: Decorators is a subset of high o
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摘要：new.target is a new “magical” value available in all functions, thoughin normal functions it will always be undefined. In any constructor,new.target a
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摘要：Each function should have a 'name' property. It can be anonymous, empty, the same as function name, or class name. For example:
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摘要：Learn how to use console.table to render arrays and objects in a tabular format for easy scanning over the values. We'll create some mock data and the
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