因此，我是JavaScript的新手，我想创建一个按钮，该按钮在按下时会更改主体背景颜色。但这没有用。这是我的代码。但这没用..
function color (){
var color = ["#02245c", "green", "blue", "red", "yellow"];
var i;
for (var i = 0; i < color.length; i++) {
color[i];
document.body.style.background = color[i];
}
}
恭喜您学习JS。
为您构建解决方案，这是我想到的最简单的方法。希望你喜欢。
const button = document.querySelector('button');
var currentColorIndex = 0;
button.onclick = () => changeColor();
function changeColor () {
var color = ["#02245c", "green", "blue", "red", "yellow"];
// You dont need a loop, this is what will change the color every time the function gets called.
if( currentColorIndex < color.length - 1 ) {
currentColorIndex++;
} else {
currentColorIndex = 0;
}
button.style.background = color[currentColorIndex];
}<!-- HTML expanding (Emmet):
- type html:5 and press Tab;
- type div>h1#header and press Tab;
-->
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