jQuery/Javascript:按下按钮即可显示数组中的随机图像 [英] Jquery/Javascript: Display a random image from an array by pressing a button

问题描述

var images = ["https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/Playing_card_heart_5.svg/200px-Playing_card_heart_5.svg.png", "http://www.pandasecurity.com/mediacenter/src/uploads/2014/11/short-link.jpg", ];

function myFunction() {
  var x = Math.floor((Math.random() * images.length); $('#afbeelding').attr('src', images[x]);
  }

HTML:

<button onclick="myFunction()">Try it</button>
<img id="afbeelding">

推荐答案

有许多可能的原因导致此问题，但最有可能的原因是您可能尚未安装JQuery.实际上，您甚至不需要JQuery:

There are many possible causes of this problem, but the most likely is that you may not have installed JQuery. In fact, you don't even need JQuery for this:

var images = ["https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/Playing_card_heart_5.svg/200px-Playing_card_heart_5.svg.png", "http://www.pandasecurity.com/mediacenter/src/uploads/2014/11/short-link.jpg"];

function myFunction() {
    var x = Math.floor((Math.random() * images.length));
        document.getElementById('afbeelding').src = images[x];
    }

注意:未经测试. 另外，您在数组末尾有一个空条目，因此我将其修复.

Note: Untested. Also, you had a null entry at the end of your array, so I fixed that.

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