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JavaScript

01

Timestamp

let id = + new Date(); 

Another possible approach

var R = (function(){
    var base = 0
      , inc  = 2;  
      
    // base 是基數(shù)， _inc 是增量 
    function config(_base, _inc){
        base = _base; 
        inc = _inc; 
    }
    
    function randGenerator(){
        var pre = base; 
        base += inc; 
        return pre + (Math.random() * inc); 
    }
    
    return {
        rand: randGenerator,
        config: config
    }
})(); 

R.config(0, 2); 
R.rand(); // 0 ~ 2 中的隨機(jī)數(shù)
R.rand(); // 2 ~ 4 中的隨機(jī)數(shù) 

uuid

https://www.npmjs.com/package...

Use uuidV1

Generate a random number that does not repeat. Use

?srand() - Seeds a random number generator
?getrandmax() - Displays the largest possible value of a random number
?mt_rand() - Generates better random numbers
These three functions.