[英]how to change the background color of the div element using javascript value comparison?
[英]Change background color of Div to value of variable using Javascript
我一直在嘗試將div的顏色更改為隨機生成的十六進制顏色代碼,該顏色代碼傳遞給變量。 我該如何工作?
HTML
<p id="demo">NULL</p>
<button onclick="generatePassword()">Generate</button>
<div id="showcase" style="background: #FFFFFF; width: 200px; height: 200px; margin: 20px; border-radius: 3px;"></div>
JAVASCRIPT
var result = document.getElementById('demo').innerHTML;
function generatePassword() {
var length = 6,
charset = "ABCDEF0123456789",
retVal = "";
for (var i = 0, n = charset.length; i < length; ++i) {
retVal += charset.charAt(Math.floor(Math.random() * n));
}
document.getElementById('demo').innerHTML = "#" + retVal;
return document.getElementById('showcase').style.backgroundColor = retVal;
}
鏈接到小提琴: https : //jsfiddle.net/elliotsoomro/gngg89t5/5/
您幾乎已經明白了,這里是解決方法: https : //jsfiddle.net/yL1uu6bz/1/
var result = document.getElementById('demo').innerHTML;
function generatePassword() {
var length = 6,
charset = "ABCDEF0123456789",
retVal = "";
for (var i = 0, n = charset.length; i < length; ++i) {
retVal += charset.charAt(Math.floor(Math.random() * n));
}
var finalVal = "#" + retVal;
document.getElementById('demo').innerHTML = finalVal;
return document.getElementById('showcase').style.backgroundColor = finalVal;
}
我只是簡單地添加了哈希符號,並以與輸出值( "#" + retVal
)相同的方式附加了它,然后將其添加到變量( finalVal
)中,然后將其輸出。
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