如何通过点击javascript中的按钮更改背景颜色和文本颜色？

Question

我正在尝试将三个不同的段落更改为遵循相同主题但不同的颜色（在示例中不明显，只是测试）。 但我不能让他们改变。 :(我也愿意用JQuery方式做到这一点。

HTML

<button onclick="white()">
        <p>White</p>
    </button>

    <button onclick="red()">
        <p>Red</p>
    </button>

    <button onclick="yellow()">
        <p>Yellow</p>
    </button>

    <button onclick="blue()">
        <p>Blue</p>
    </button>

    <h1>Hey There</h1>
    <ul class="list-unstyled">
        <li>Colors are cool</li>
        <li>Join the Rebellion!!!</li>
    </ul>


    <div class="colorbox" id="colorbox1">
        <h1>Div one</h1>
        <p>I'm 1</p>
    </div>

    <div class="colorbox" id="colorbox2">
        <h1>Div two</h1>
        <p>I'm 2</p>
    </div>

    <div class="colorbox" id="colorbox3">
        <h1>Div three</h1>
        <p>I'm 3</p>
    </div>

JAVASCRIPT

var colorbox1 = document.getElementsById('colorbox1');
var colorbox2 = document.getElementsById('colorbox2');
var colorbox3 = document.getElementsById('colorbox3');

function white() {
    colorbox1.style.backgroundColor = "white";
    colorbox1.style.color = "black";

    colorbox2.style.backgroundColor = "white";
    colorbox2.style.color = "black";

    colorbox3.style.backgroundColor = "white";
    colorbox3.style.color = "black";
}

function red() {
    colorbox1.style.backgroundColor = "red";
    colorbox1.style.color = "black";

    colorbox2.style.backgroundColor = "red";
    colorbox2.style.color = "black";

    colorbox3.style.backgroundColor = "red";
    colorbox3.style.color = "black";
}

function yellow() {
    colorbox1.style.backgroundColor = "yellow";
    colorbox1.style.color = "black";

    colorbox2.style.backgroundColor = "yellow";
    colorbox2.style.color = "black";

    colorbox3.style.backgroundColor = "yellow";
    colorbox3.style.color = "black";
}

function blue() {
    colorbox1.style.backgroundColor = "white";
    colorbox1.style.color = "black";

    colorbox2.style.backgroundColor = "white";
    colorbox2.style.color = "black";

    colorbox3.style.backgroundColor = "white";
    colorbox3.style.color = "black";
}

Answer 1

没有getElementsById()方法，只有getElementById()没有s

var colorbox1 = document.getElementById('colorbox1');
var colorbox2 = document.getElementById('colorbox2');
var colorbox3 = document.getElementById('colorbox3');

Answer 2

JQUERY处理它的方法：首先我只有一个函数。 例如，只需在参数中给它颜色

onclick="changeColor('#3E6AA9')" //for blue

这是一个完整的代码（没有处理背景）

<button onclick="changeColor('#fff')">
        <p>White</p>
    </button>

    <button onclick="changeColor('#D80000')">
        <p>Red</p>
    </button>

    <button onclick="changeColor('#FBD505')">
        <p>Yellow</p>
    </button>

    <button onclick="changeColor('#0086BE')">
        <p>Blue</p>
    </button>

    <h1>Hey There</h1>
    <ul class="list-unstyled">
        <li>Colors are cool</li>
        <li>Join the Rebellion!!!</li>
    </ul>


    <div class="colorbox" id="colorbox1">
        <h1>Div one</h1>
        <p>I'm 1</p>
    </div>

    <div class="colorbox" id="colorbox2">
        <h1>Div two</h1>
        <p>I'm 2</p>
    </div>

    <div class="colorbox" id="colorbox3">
        <h1>Div three</h1>
        <p>I'm 3</p>
    </div>
    <script>
    function changeColor(color){
console.log(color);
$('.colorbox').css({'color': color});
}
    </script>

检查这个有效的FIDDLE