Your browser is probably just caching the image response from cataas.com.
Per the answers to this SO question, you can just tack on some harmless GET parameters to the request URL that will be ignored by the server but ultimately trick your browser into not caching the response:
function loadCatPicture() {
var img = document.getElementById('cat-picture');
img.src = 'https://cataas.com/cat?ver=' + (new Date().getTime());
};
window.onload = function() {
loadCatPicture();
};
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h1>Cats Sleep Anywhere</h1>
<p>
Cats sleep anywhere, any table, any chair.<br> Top of piano, window-ledge, in the middle, on the edge.<br> Open draw, empty shoe, anybody's lap will do.<br> Fitted in a cardboard box, in the cupboard with your frocks.<br> Anywhere! They don't care!
Cats sleep anywhere.<br>
<br>
<img id="cat-picture">
<b>Eleanor Farjeon</b></p>
<p></p>
</body>
</html>
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
