更改按钮颜色 onClick [英] Change Button color onClick
问题描述
我希望我的 Button 每次点击它时都会改变颜色.但它只会在第一次点击时改变颜色.
I want my Button to change color every time I click on it. But it only changes color on the first click.
我相信问题出在 setColor 函数中.每次单击 Button 时，count 都会设置为 1.因此，即使我将其设置为 0，下次单击时它也会重置为 1.我该如何解决?javascript/html 中是否有全局变量可以轻松解决?
I believe the problem is in the setColor function. Every time I click on the Button, count gets set to 1. So even when I set it to 0, it gets reset to 1 on the next click. How do I fix this? Are there global variables in javascript/html where this would easily be solved?
<!DOCTYPE html>
<html>
<head>
<script>
function setColor(btn, color){
var count=1;
var property = document.getElementById(btn);
if (count == 0){
property.style.backgroundColor = "#FFFFFF"
count=1;
}
else{
property.style.backgroundColor = "#7FFF00"
count=0;
}
}
</script>
</head>
<body>
<input type="button" id="button" value = "button" style= "color:white" onclick="setColor('button', '#101010')";/>
</body>
</html>
推荐答案
javascript 中确实有全局变量.您可以详细了解范围，这在这方面很有帮助情况.
There are indeed global variables in javascript. You can learn more about scopes, which are helpful in this situation.
您的代码可能如下所示:
Your code could look like this:
<script>
var count = 1;
function setColor(btn, color) {
var property = document.getElementById(btn);
if (count == 0) {
property.style.backgroundColor = "#FFFFFF"
count = 1;
}
else {
property.style.backgroundColor = "#7FFF00"
count = 0;
}
}
</script>
希望这会有所帮助.
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