JS array random value (random array value)

principle ： Get by random numbers [0, The length of the array ] Key value of , Then directly get the array value corresponding to the key .

Be careful ： The following code applies to one-dimensional arrays , Multidimensional arrays extend themselves ！

function randomArr(arr){
    
  return arr[parseInt(Math.random() * arr.length, 10)]
}
var color_arr = ['#00ff089e', '#0043ff9e', '#fff7009e', '#ff00009e'];
console.log(' Random color values ：', randomArr(color_arr));