cli.isMultipleCompiler is not a function

An error is reported when using webpack-dev-server to build a development server, and the error message is as follows:[webpack-cli] TypeError: cli.isMultipleCompiler is not a function.

Solution:

Directly upgrade webpack-cli version to 4.10.0

npm i webpack-cli@4.10.0 -D

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Use of js array filter() method

Arrays are frequently used in development, and processing data in arrays is one of the more common and important operations. Therefore, processing data in arrays during development is an important skill. Every developer Everyone should master the operations of arrays, especially for junior developers who have just entered the industry, so be sure to master the relevant skills. This article mainly shares some operations to filter the data in the array, about the use of the filter() method.

ES6 arrow functions

In ES6, in addition to the new features of let and const, arrow functions are the most frequently used new features. But this feature is not unique to ES6. Arrow functions, as the name suggests, are functions defined using arrows (=>) and belong to a class of anonymous functions. It allows us to write smaller function syntaxes. The code of arrow functions is simpler and more flexible to write.

code sky

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