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HMR hot module replacement / module hot replacement Function: when a module changes, it will only update the module (not package all) to improve the speed Style file: you can use the HRM function because the style loader is implemented internally js file: no HRM by default html file: there is no HRM by defau lt, and the html file cannot be ...

Did you spend an afternoon reading Mozilla documents? If so, you will find a lot of JS information on the Internet, which makes it easy for us to ignore the more basic JS operators.These operators are uncommon but powerful! It looks very similar in grammar, but its function is different. You must read it carefully.1,?? Non air operatorIn JS,?? ...

JS array traversal is basically for,forin,foreach,forof,map and other methods. The following describes several array traversal methods used in this analysis and performance analysis and comparison The first is a normal for loop The code is as follows: for(j = 0; j < arr.length; j++) { } Brief description: the simplest one is also the ...

Usually, during the project process, the data returned by the api you need may not be completed at the back end, but only documents. At this time, you need to use mock to intercept ajax requests, generate random data, and complete the data rendering of the page There are different deployment schemes for mock.js, so I won't list them one by one ...

The so-called digital thousandth form, that is, from the single digit, add a comma between every three digits. For example, "10000". To meet this requirement, I initially wrote such a function: Method 1 The code is as follows: // Method 1 function toThousands(num) { var result = [ ], counter = 0; num = (num || 0).toString() ...

preface Over the past few years, I have been struggling in the it industry. Along the way, many have summarized some high-frequency interviews in the python industry. I see most of the new blood in the industry, and I still have all kinds of difficult questions for the answers to all kinds of interview questions or collection Therefore, I dev ...

1. Download the toolkit Redux, react Redux and Redux saga in the project  yarn add redux  yarn add react-redux  yarn add redux-saga 2. Create Redux folder and corresponding directory in src directory 3. Introduce createStore in store.js Create store: call the createStore() method to get the store. The parameter passed in the method is a ...

catalogue 1, Operator 1. Arithmetic operator Find the area of a circle 2. Assignment operator 3. Unary operator 4. Comparison operator 5. Logical operators 6. Operator priority 2, Statement 1. Expressions and statements 2. Branch statement 1.if branch statement Case: Case: 2. Ternary operator Case: 3.switch statement Case: s ...

Vuepress should have been used by many people, and   VitePress   yes   VuePress   The next generation framework is to support vue 3.0   web site framework.In its documentation, it is called   Vuepress's brothers have some advantages over others:be based on   Vite   instead of   Webpack   So fast ...

This counting method is primarily used to iterate over array objects, which in turn pass each element of the array to the functions we provide to facilitate iteration, mapping, filtering, testing, and merging of the array. Before talking about these methods, let's first understand that all of them accept a function as their first argument and ...