[英]one button two if statements for a css div in javascript
If I use two buttons it works fine now I wonder if I could use just one and how, this is the code for two buttons however I want to use only one button to execute the code that changes the style of the div, for instance the buttons code that I wrote is: 如果我使用两个按钮,它现在可以正常工作,我想知道是否可以只使用一个按钮,以及如何使用,这是两个按钮的代码,但是我只想使用一个按钮来执行更改div样式的代码,例如我写的按钮代码是:
<title></title>
<style>#ok{width:100px;height:100px;background-color:black;}</style>
</head>
<body>
<div id="ok">ok</div>
<button id="a">on</button>
<button id="b">off</button>
<script>
var a=document.querySelector("#a");
var b=document.getElementById("ok");
a.addEventListener("click",k,false);
var c=document.querySelector("#b");
c.addEventListener("click",g,false);
function k(){
b.style.backgroundColor="yellow";
};
function g(){
b.style.backgroundColor="black";
};
</script>
I think what do you want to do is: 我认为您想做的是:
document.querySelector("#a").addEventListener("click", k, false);
function k() {
var a = document.querySelector("#a");
var ok = document.getElementById("ok");
if(ok.style.backgroundColor=="yellow"){
a.innerHTML = "on";
ok.style.backgroundColor = "black";
}
else{
a.innerHTML = "off";
ok.style.backgroundColor = "yellow";
}
};
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