如何使用JavaScript中的getElementById(“”)。style.color更改对象的颜色[关闭]

问题描述 投票:2回答:2
我正在尝试单击button2(名为“ blue”)时将框的颜色更改为蓝色。

这是无效的代码。...任何人都可以帮忙吗?

演示

document.getElementById("button1").addEventListener("click", function(){ document.getElementById("box").style.height = "300px"; document.getElementById("box").style.width = "300px"; }); document.getElementById("button2").addEventListener("click", function(){ document.getElementById("box").style.color = 'blue'; });
<!DOCTYPE html>
<html>
<head>
    <title>Jiggle Into JavaScript</title>
    <!-- <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script> -->
</head>
<body>

    <p>Press the buttons to change the box!</p>

    <div id="box" style="height:150px; width:150px; background-color:orange; margin:25px"></div>

    <button id="button1">Grow</button>
    <button id="button2">Blue</button>
    <button id="button3">Fade</button>
    <button id="button4">Reset</button>

    <script type="text/javascript" src="Javascript.js"></script>

        

</body>
</html>
javascript html dom getelementbyid event-listener
2个回答
4
投票
更改背景颜色,而不是HTML元素的color属性。

document.getElementById("button2").addEventListener("click", function(){ document.getElementById("box").style.backgroundColor = "blue"; });

请在下面找到工作清单:

document.getElementById("button2").addEventListener("click", function(){ document.getElementById("box").style.backgroundColor = "blue"; });
<!DOCTYPE html>
<html>
<head>
    <title>Jiggle Into JavaScript</title>
</head>
<body>

    <p>Press the buttons to change the box!</p>

    <div id="box" style="height:150px; width:150px; background-color:orange; margin:25px"></div>

    <button id="button1">Grow</button>
    <button id="button2">Blue</button>
    <button id="button3">Fade</button>
    <button id="button4">Reset</button>

</body>
</html>

1
投票
您使用错误的属性将颜色改为背景

<div id="box" style="height:150px; width:150px; background-color:orange; margin:25px"></div> <button id="button0">Grow</button> <button onclick="Grow()" id="button1">Grow</button> <button onclick="Blue()" id="button2">Blue</button> <button onclick="Fade()" id="button3">Fade</button> <button onclick="Reset()" id="button4">Reset</button>

const box = document.getElementById('box');

document.getElementById('button0').addEventListener('click', e => {
    box.style.width = '500px';
    box.style.height = '500px';
})

const Grow = e => {
    box.style.width = '300px';
    box.style.height = '300px';
}

const Blue = e => {
    box.style.background = 'blue';
}
const Reset = e => {
    box.setAttribute('style', 'height:150px; width:150px; background-color:orange; margin:25px');
}
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