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javascript style.color 獲取顏色的疑問，不知怎么解決

JavaScript

慕哥6287543 2021-02-17 15:15:56

代碼如下，如果是class則取出的顏色值是空，但如果直接用style則正確，不知怎么解決<html><head><style type="text/css">p.ci_1 {color: #80FF80;}</style><script type="text/javascript">function setColor(){var g_all = document.getElementsByTagName("p");var n = g_all.length;for (var i = 0; i < n; i++){// g_all[i].style.color="#80FF80";alert("aa--"+g_all[i].style.color+"--bb");}}</script></head><body><p class='ci_1'>This is an example paragraph.</p><p style='color: #80FF80' >This is also an example paragraph.</p><input type="button" onclick="setColor()" value="Change color of text" /></body></html>

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2 回答

守著一只汪

TA貢獻1872條經(jīng)驗獲得超4個贊

<!DOCTYPE html>
<html>
<head>
<title>getHexColor js/jQuery 獲得十六進制顏色</title>
<meta charset="utf-8" />
<script type="text/javascript">
function getHexBgColor(){
var str = [];
var rgb = document.getElementById('color').style.backgroundColor.split('(');
for(var k = 0; k < 3; k++){
str[k] = parseInt(rgb[1].split(',')[k]).toString(16);
}
str = '#'+str[0]+str[1]+str[2];
document.getElementById('color').innerHTML = str;
}
function getHexColor(){
var str = [];
var rgb = document.getElementById('color').style.color.split('(');
for(var k = 0; k < 3; k++){
str[k] = parseInt(rgb[1].split(',')[k]).toString(16);
}
str = '#'+str[0]+str[1]+str[2];
document.getElementById('color').innerHTML = str;
}
</script>
<style type="text/css">
#color{
width: 200px;
height: 200px;
line-height: 200px;
text-align: center;
}
</style>
</head>
<body>
<div style="color: #88ee22; background-color: #ef8989;" id="color"></div>
<input onclick="getHexBgColor();" type="button" value="獲得背景色" />
<input onclick="getHexColor();" type="button" value="獲得字體顏色" />
</body>
</html>

點擊“獲得背景色”按鈕，會調(diào)用getHexBgColor()方法獲取css的背景色。