Answer1215

摘要： In this lesson, we walk through how to use one of React's Test Utilities (from thereact-addons-test-utilspackage) called "Shallow Rendering". This let... 阅读全文

摘要： JSON(JavaScript Object Notation) is a standard method to serialize JavaScript objects and is commonly used to transfer data from the server to the bro... 阅读全文

摘要： To write tests for our React code, we need to first install some libraries for running tests and writing assertions. In this lesson we walk through se... 阅读全文

摘要： We can use the destructing and rest parameters at the same time when dealing with Array opration.Example 1:let [first, ...remainingUsers] = ["Sam", "T... 阅读全文

摘要： function spinner(target, options = {}){ let defaults = { message: "Please wait", spinningSpeed: 5, cssClass: ".is-spinning" }; let setting... 阅读全文

摘要： Creating Object:Example 1:let name = "Brook";let totalReplies = 249;let avatar = "/users/avatars/brook-user-1.jpg";let user = {name, totalReplies, ava... 阅读全文

摘要： The spread operator allow us to split an Array arguement into individual elements.getRequest("/topics/17/tags", function(data){ let tags = data.tag... 阅读全文

摘要： Problem with the ES5:function displayTags(){ for (let i in arguments) { let tag = arguments[i]; _addToTopic(tag); }}Hard to tell w... 阅读全文

摘要： 1. Default Value of function param:The functiondisplayTopicsPreview()raises an error on the very first line when called with no arguments. Let's fix t... 阅读全文

摘要： we leverage private components to break our render function into more manageable pieces without leaking the implementation details of our component. ... 阅读全文