Answer1215

摘要： somereturns abooleanvalue after passing each item in the source array through the test function that you pass in as the first parameter. This makes it... 阅读全文

摘要： When you render a component with the Shallow Renderer, you have access to the underlying object. We can write lots of useful tests to check that our c... 阅读全文

摘要： When writing React component tests, it can be hard to decipher the error diffs of broken tests, since they are just the final objects that React uses ... 阅读全文

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