Understanding the difference between import and require in javascript |#javascript | #Revildo_code

Understanding the difference between import and require in javascript | Javascript Full Course |#javascript | #Revildo_code


One of the major differences between require() and import() is that require() can be called from anywhere inside the program whereas import() cannot be called conditionally, it always runs at the beginning of the file. To use the require() statement, a module must be saved with . js extension as opposed to .




Require is Non-lexical, it stays where they have put the file. Import is lexical, it gets sorted to the top of the file. It can be called at any time and place in the program. It can't be called conditionally, it always run in the beginning of the file.




The major difference between require and import , is that require will automatically scan node_modules to find modules, but import , which comes from ES6, won't. Most people use babel to compile import and export , which makes import act the same as require . The future version of Node.




The require() method is used to load and cache JavaScript modules. So, if you want to load a local, relative JavaScript module into a Node. js application, you can simply use the require() method. Example: var yourModule = require( "your_module_name" ); //.js file extension is optional.




Cases where it is necessary to use both "require" and "import" in a single file, are quite rare and it is generally not recommended and considered not a good practice. However, sometimes it is the easiest way for us to solve a problem. There are always trade-offs and the decision is up to you.



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