How to override js in magento 2

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 How to override js in magento 2

To override js we need requirejs-config.js

requirejs-config.js need to create at [Vendor]/[Module]/view/frontend/requirejs-config.js

var config = {
    map: {
        '*': {
            'Magento_Checkout/js/model/shipping-rates-validator':'Vendor_Module/js/model/shipping-rates-validator'
        }
    }
};

Create file at app/code/Vendor/Module/view/frontend/web/js/model/shipping-rates-validator.js

Write your inside file and boom!!! 

If developer mode is on and symlinks are generating clear cache bin/magento cache:clean

If production mode is on , need to deploy static content files using command bin/magento s:s:d 


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