介紹 核心概念 1. 入口(Entry) ２. 出口(Output) ３. Loader ４. 插件(Plugins)
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測(cè)試代碼的設(shè)置與清理
在編寫(xiě)測(cè)試時(shí)艘希，通常需要在測(cè)試運(yùn)行之前進(jìn)行一些設(shè)置工作病苗，并且需要在測(cè)試運(yùn)行后進(jìn)行一些完成工作。 Jest提供幫助函數(shù)來(lái)處理這個(gè)乡话。 如果你有一些工作需要多次測(cè)試身冬，你可以使用bef...
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Jest測(cè)試異步代碼
JavaScript中經(jīng)常有異步運(yùn)行的代碼葵陵。如果你要測(cè)試異步的代碼纸型，Jest需要知道他測(cè)試的代碼是否已經(jīng)完成異步動(dòng)作，然后才可以進(jìn)行測(cè)試食铐。Jest有這幾種方法來(lái)處理這個(gè)問(wèn)題匕垫。...
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Higher Order Components: A React Application Design Pattern 高階組件：react應(yīng)用設(shè)計(jì)模式
In this article we will discuss how to use Higher Order Components to keep your React a...
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jest的安裝與簡(jiǎn)單用例
創(chuàng)建一個(gè)項(xiàng)目文件加 jestTest mkdir /.../jestTest 進(jìn)入 jestTest文件夾 cd /.../jestTest 通過(guò)npm安裝 jest npm...
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Making your JavaScript Pure 使您的JavaScript純凈
Once your website or application goes past a small number of lines, it will inevitably ...
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4.3 Composing Components 構(gòu)成組件
Components can refer to other components in their output. This lets us use the same com...
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4.2 Rendering a Component 渲染一個(gè)組件
Previously, we only encountered React elements that represent DOM tags: 以前偶惠，我們只會(huì)遇到表示DOM標(biāo)...
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3.2 Updating the Rendered Element 更新被渲染的元素
React elements are immutable. Once you create an element, you can't change its children...
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4.0 Components and Props 組件和Props
Components let you split the UI into independent, reusable pieces, and think about each...
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4.1 Functional and Class Components 函數(shù)和類(lèi)組件
The simplest way to define a component is to write a JavaScript function: 定義一個(gè)組件最簡(jiǎn)單的方法是...
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3.1 Rendering an Element into the DOM 渲染一個(gè)元素到DOM里
Let's say there is a somewhere in your HTML file: 假設(shè)你的HTML文件里面有一個(gè) ： We call this a ...
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3.0 Rendering Elements 渲染元素
Elements are the smallest building blocks of React apps. 元素是構(gòu)建React應(yīng)用的最小塊春寿。 An element d...
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3.3 React Only Updates What's Necessary React只會(huì)進(jìn)行必要的更新
React DOM compares the element and its children to the previous one, React DOM將元素及其子元素與...
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2.3 Specifying Attributes with JSX 在JSX里面聲明參數(shù)
You may use quotes to specify string literals as attributes: 你可以使用引號(hào)指定字符串作為屬性： const el...
