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javascript generate uuid

const generateUuid = (): string => {
    return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, (character) => {
        const random = (Math.random() * 16) | 0;
        const value = character === "x" ? random : (random & 0x3) | 0x8;

        return value.toString(16);
    });
};
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uuid javascript

function uuid() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}

var userID=uuid();//something like: "ec0c22fa-f909-48da-92cb-db17ecdb91c5" 
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uuid javascript

    function uuid() {
        const template = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx';
        const xAndYOnly = /[xy]/g;

        return template.replace(xAndYOnly, (character) => {
            const randomNo =  Math.floor(Math.random() * 16);
            const newValue = character === 'x' ? randomNo : (randomNo & 0x3) | 0x8;

            return newValue.toString(16);
        });
    }
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uuid in node js

const {v4 : uuidv4} = require('uuid')
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