Some examples of random numbers in JavaScript

Last Update:2017-01-13 Source: Internet

Author: User

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JS Random number method

The following methods apply to hidden windows: An IFRAME page, a mobile browser, and so on.

Method: Gets the current page URL, which is loaded after the URL plus a random number. You can force the refresh of the current page.

Disadvantage: Because a new URL is loaded that produces ' history ', the browser can return to look at a page (actually the same page).

code is as follows

copy code

var url= '; To acquire, js,php,asp, etc. as needed;
Function Randomnumber () {
//Get random number
    var now=new Date ();
    var number = Now.getseconds () + (Now.getmilliseconds ()%43) *7/1.131412567;
    if (number ==0) {
        number = Now.getfullyear () + (no W.getmilliseconds ()%1.24377) *7/1.131412567;
   }
    return number;
}
window.location.href=url+ ' &number= ' +randomnumber ();

//Note that the delimiters here & need to be based on the symbols used in the actual variable URL;

random number, number of random two number of intervals

code is as follows	copy code
/* * Description: Random integer that takes any value starting to any value * Parameters: under: Starting value ; Over: Termination value / Function Frandomby (under, over) { switch (arguments.length) { ; case 1:return parseint (Math.random () under+1); case 2:return parseint (Math.random () * (over-under+1) + under); Default:return 0; } }

A set of beautiful color arrays that you can add to your face to produce random colors:

The code is as follows

Copy Code

/*
* Note: According to random number of random color, you must first define a color value of the global array variable
Parameters
Num: Random number
*/
var colorarr=[' #FF6666 ', ' #D366FF ', ' #FF8166 ', ' #6672FF ', ' #FF667F ', ' #9B66FF ', ' #FF66D8 ', ' #FF6675 ', ' #66B2FF ', ' Ff8e66 ', ' #FF66F9 ', ' #FF8B66 ', ' #FF7766 ', ' #FF66C6 ', ' #FFC666 ', ' #6866FF ', ' #FF667C ', ' #FF7566 ', ' #FF66BC ', ' #6666FF ', ' 6696FF ', ' #FF9666 ', ' #66DDFF ', ' #669DFF ', ' #CE66FF ', ' #66C6FF ', ' #FFAD66 ', ' #BA66FF ', ' #8966FF ', ' #E266FF ', ' #F466FF ', ' Ff66be ', ' #36F08B ', ' #66A3FF ', ' #F166FF ', ' #66BAFF ', ' #8E66FF ', ' #FF6689 ', ' #66AAFF ', ' #C966FF ', ' #66A0FF ', ' #8766FF ', ' fa558b ', ' #66B7FF ', ' #ED66FF '];

function Randomcolor (num) {
return Colorarr[num];
}

var color=randomcolor (Frandomby (0, 30)); Get the color

generate random color values

The code is as follows

Copy Code

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> Refresh try-random color practice </title>
<style type= "Text/css" >
. div {width:100px; height:100px; float:left;}
</style>

<body>
<div class= "Div" ></div>
<div class= "Div" ></div>
<div class= "Div" ></div>
<div class= "Div" ></div>
<div class= "Div" ></div>
<div class= "Div" ></div>

<script type= "Text/javascript" >
Window.onload=function () {
var obj=document.getelementsbyclassname (' div ');
for (Var i=0;i<obj.length;i++) {
Obj[i].style.backgroundcolor=hsl2color ([Radomfuc (360), 100, 70])
}
}

function Radomfuc ($value) {//Take random numbers
return parseint ($value * math.random ());
}

function Hsl2color (HSL) {//HSL color algorithm
if (Hsl[0] > 360 | | hsl[0] < 0 | | hsl[1] > | | hsl[1] < 0 | | hsl[2] > | | hsl[2] < 0) return "#000 000 ";
var RGB = [0, 0, 0];
if (Hsl[0] <= 60) {
Rgb[0] = 255;
RGB[1] = Math.floor (255/60 * hsl[0));
else if (Hsl[0] <= 120) {
Rgb[0] = Math.floor (255-(255/60) * (hsl[0)-60));
RGB[1] = 255;
else if (Hsl[0] <= 180) {
RGB[1] = 255;
RGB[2] = Math.floor ((255/60) * (hsl[0)-120));
else if (Hsl[0] <= 240) {
RGB[1] = Math.floor (255-(255/60) * (hsl[0)-180));
RGB[2] = 255;
else if (Hsl[0] <= 300) {
Rgb[0] = Math.floor ((255/60) * (hsl[0)-240));
RGB[2] = 255;
else if (Hsl[0] <= 360) {
Rgb[0] = 255;
RGB[2] = Math.floor (255-(255/60) * (hsl[0)-300));
}
var sat = Math.Abs ((hsl[1]-100)/100);
Rgb[0] = Math.floor (rgb[0]-(rgb[0)-128) * sat);
RGB[1] = Math.floor (rgb[1]-(rgb[1)-128) * sat);
RGB[2] = Math.floor (rgb[2]-(rgb[2)-128) * sat);
var lum = (Hsl[2]-50)/50;
if (Lum > 0) {
Rgb[0] = Math.floor (rgb[0] + (255-rgb[0)) * Lum);
RGB[1] = Math.floor (rgb[1] + (255-rgb[1)) * Lum);
RGB[2] = Math.floor (rgb[2] + (255-rgb[2)) * Lum);
else if (Lum < 0) {
Rgb[0] = Math.floor (rgb[0] + rgb[0] * lum);
RGB[1] = Math.floor (rgb[1] + rgb[1] * lum);
RGB[2] = Math.floor (rgb[2] + rgb[2] * lum);
}
Return "#" + (0x1000000 + rgb[0] * 0x010000 + rgb[1] * 0x000100 + rgb[2]). toString. substring (1);
}
</script>
</body>

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Some examples of random numbers in JavaScript

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