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JavaScript

jeffe otto
jeffe otto
10,561 Points

Way around this function

I´ve been trying to put it all together, but i had to write the math random 3 times, otherwise it ends up with repeated numbers like 111,111,111 or 15,15,15 which causes black, white and grays divs. Any suggestion?

Thanks

var html = ´´;
var rgbColor;


function makeColors(){
    var color1 =  Math.floor(Math.random() * 256 ) ;
  var color2 =  Math.floor(Math.random() * 256 ) ;
  var color3 =  Math.floor(Math.random() * 256 ) ;

  var color = 'rgb(';
   color += color1  + ',';
   color += color2  + ',';
   color += color3  + ')';
   return color;
}



function print(message){
  document.write(message);
}

for (var i = 0; i < 10; i++) {

    rgbColor = makeColors();
    html += '<div style="background-color:' + rgbColor + '"></div>';
}
print(html);

2 Answers

Steven Parker
Steven Parker
229,982 Points

If you want 3 different colors, you must use 3 random values, but you can consolidate the process by creating a function that generates a random color value, and then calling it 3 times to get the actual color:

const rc = _=> Math.floor(Math.random() * 256);
const makeColors = _=> `rgb(${rc()},${rc()},${rc()})`;
jeffe otto
jeffe otto
10,561 Points

That's it, the generating random number must be a function. Thank you very much!! This is how it worked for me:

var html = '';
var rgbColor;


function makeColors(){

let rc = () => {return Math.floor(Math.random() * 256 )};

 let  color = `rgb(${rc()},${rc()},${rc()})`;

   return color;

};



function print(message){
  document.write(message);
}

for (var i = 0; i < 1000; i++) {

    rgbColor = makeColors();
    html += '<div style="background-color:' + rgbColor + '"></div>';
}
print(html);