我试图在骰子上打印出图像,而不仅仅是数字。但是当我使用document.write时,它只是打开一个新选项卡,并显示图片。我应该用什么按钮打印出来?
<div id="roll-dice">
<button type="button" value="Trow dice" onclick="rolldice()">Roll dice</button>
<span id="roll-result"></span>
</div>
var rollResult = Math.floor(Math.random() * 6) + 1;
if (rollResult == 1) document.write('<img src="1.jpg">');
else if (rollResult == 2) document.write('<img src="2.jpg">');
else if (rollResult == 3) document.write('<img src="3.jpg">');
else if (rollResult == 4) document.write('<img src="4.jpg">');
else if (rollResult == 5) document.write('<img src="5.jpg">');
else document.write('<img src="6.jpg">');
使用图片框并修改其来源
<img src="" id="pic-result"/>
javascript代码:
var rollResult = Math.floor(Math.random() * 6) + 1;
var pic = document.getElementById("pic-result");
if (rollResult == 1) pic.setAttribute('src', '1.jpg');
else if (rollResult == 2) pic.setAttribute('src', '2.jpg');
else if (rollResult == 3) pic.setAttribute('src', '3.jpg');
else if (rollResult == 4) pic.setAttribute('src', '4.jpg');
else if (rollResult == 5) pic.setAttribute('src', '5.jpg>');
else pic.setAttribute('src', '6.jpg');
你应该能够用innerHTML
上的#roll-result
实现这个目标:
var diceResult = document.querySelector('#roll-result');
function rolldice() {
var rollResult = Math.floor(Math.random() * 6) + 1;
diceResult.innerHTML = '<img src="' + rollResult + '.jpg">';
}
<div id="roll-dice">
<button type="button" value="Trow dice" onclick="rolldice()">Roll dice</button>
<span id="roll-result"></span>
</div>
您应该设置父元素的innerHTML,而不是将元素写入页面:
<div id="roll-dice">
<button type="button" value="Trow dice" onclick="rolldice()">Roll dice</button>
<span id="roll-result"></span>
</div>
JS:
var rollResult = Math.floor(Math.random() * 6) + 1;
var imageContainer = document.getElementById("roll-result");
if (rollResult == 1) imageContainer.innerHTML = '<img src="1.jpg">';
else if (rollResult == 2) imageContainer.innerHTML = '<img src="2.jpg">';
else if (rollResult == 3) imageContainer.innerHTML = '<img src="3.jpg">';
else if (rollResult == 4) imageContainer.innerHTML = '<img src="4.jpg">';
else if (rollResult == 5) imageContainer.innerHTML = '<img src="5.jpg">';
else imageContainer.innerHTML = '<img src="6.jpg">';
你甚至可以绕过所有的if语句,只使用这个代码,它与上面的代码完全相同,只不过它只有一行:
document.getElementById("roll-result").innerHTML = '<img src="' + (Math.floor(Math.random() * 6) + 1) + '" />
希望这有帮助!