javascript按钮从数组中选择随机项 [英] javascript button to pick random item from array

问题描述

请有人帮忙。我正在尝试在javascript中创建一个基本按钮，当单击时从我的数组中随机选择一个值并将其显示在屏幕上，每次单击该按钮时它应该从数组中选择一个新项目。我知道如何编写数组

Please can someone help. I am trying to create a basic button in javascript that when clicked picks a value at random from my array and display it on the screen, each time the button is clicked it should pick a new item from the array. I know how to write the array

var myarray = new Array("item1", "item2", "item3");

我只是不知道如何做按钮部分。任何帮助都会很棒。我知道在jQuery中执行此操作可能更容易，但我真的想在解决jQuery问题之前先了解一下javascript（请保持温和我是新来的大声笑）

I just dont know how to do the button part. Any help would be great. I know it may be easier to do this in jQuery, but I really want to get my head round javascript before I tackle jQuery (please be gentle I am new to this lol)

推荐答案

你可以点击按钮来调用一个函数来打印这样的值

You can call a function on button click to print the value like this

<input type="button" id="btnSearch" value="Search" onclick="GetValue();" />
<p id="message" ></p>

JS

function GetValue()
{
    var myarray= new Array("item1","item2","item3");
    var random = myarray[Math.floor(Math.random() * myarray.length)];
    //alert(random);
    document.getElementById("message").innerHTML=random;
}

JS小提琴演示

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