JS实现按钮颜色切换效果
程序员文章站
2022-04-09 22:14:16
本文实例为大家分享了使用参数函数实现按钮颜色切换的具体代码，供大家参考，具体内容如下
本文实例为大家分享了使用参数函数实现按钮颜色切换的具体代码，供大家参考，具体内容如下
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>document</title>
</head>
<body>
<button id="btn1" onclick="btn(1)">按钮1</button>
<button id="btn2" onclick="btn(2)">按钮2</button>
<button id="btn3" onclick="btn(3)">按钮3</button>
<script>
//设置背景颜色
//如果设置参数函数会节省函数数量吧
//设置flag+参数函数
flag = "btn1";
function btn1(){
document.getelementbyid("btn2").style.color = "black";
document.getelementbyid("btn3").style.color = "black";
document.getelementbyid("btn1").style.color = "red";
}
function btn2(){
document.getelementbyid("btn1").style.color = "black";
document.getelementbyid("btn2").style.color = "red";
document.getelementbyid("btn3").style.color = "black";
}
function btn3(){
document.getelementbyid("btn1").style.color = "black";
document.getelementbyid("btn2").style.color = "black";
document.getelementbyid("btn3").style.color = "red";
}
function btn(num){
if(num == 1){
document.getelementbyid(flag).style.color = "black";
document.getelementbyid(flag).style.backgroundcolor = "white";
document.getelementbyid("btn1").style.color = "red";
document.getelementbyid("btn1").style.backgroundcolor = "blue";
flag = "btn1";
}
if(num == 2){
document.getelementbyid(flag).style.color = "black";
document.getelementbyid(flag).style.backgroundcolor = "white";
document.getelementbyid("btn2").style.color = "red";
document.getelementbyid("btn2").style.backgroundcolor = "blue";
flag = "btn2";
}
if(num == 3){
document.getelementbyid(flag).style.color = "black";
document.getelementbyid(flag).style.backgroundcolor = "white";
document.getelementbyid("btn3").style.color = "red";
document.getelementbyid("btn3").style.backgroundcolor = "blue";
flag = "btn3";
}
}
</script>
</body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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