如何为按钮编写代码以生成随机背景颜色渐变
我想添加一个在背景中生成随机线性渐变的按钮。当我单击一个按钮或另一个按钮时，下面的代码会生成线性渐变。
var color1 = document.querySelector(".color1");
var color2 = document.querySelector(".color2");
var gradient = document.querySelector("body");
var css=document.querySelector("h3");
var random = document.getElementById("random")
css.textContent = gradient.style.background = "linear-gradient(to right," + color1.value + "," + color2.value +")";
function setBackground(){
gradient.style.background = "linear-gradient(to right," +
color1.value + "," + color2.value +")";
css.textContent = gradient.style.background + ";"
}
color1.addEventListener("input", setBackground);
color2.addEventListener("input", setBackground);
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2回答
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鸿蒙传说
以下代码段应该可以实现您想要实现的目标。请随时询问是否有不清楚的地方。const body = document.getElementsByTagName('BODY')[0];const button = document.getElementsByTagName('BUTTON')[0];function changeBackground(){ body.style.background = `linear-gradient(to right,${getRandomHEXColor()},${getRandomHEXColor()})`;}function getRandomHEXColor() { const SEED = '0123456789abcdef'; let output = '#'; while (output.length < 7) { output += SEED[Math.floor(Math.random() * SEED.length)]; } return output;}button.addEventListener("click", changeBackground);<html> <body> <button>CHANGE BACKGROUD</button> </body></html> -
烙印99
我这样做是为了完成一项任务，这就是我想出的：function gradient(){ var randOne = Math.floor(Math.random()*16777215).toString(16); var randTwo = Math.floor(Math.random()*16777215).toString(16); var randDeg = Math.floor(Math.random()*361); document.body.style.background = "linear-gradient(" + randDeg +"deg , #" + randOne + ", #" + randTwo + ")"; color.innerHtml = "linear-gradient(" + randDeg +"deg , #" + randOne + ", #" + randTwo + ")"; }<body> <div class="container"> <div class="row"> <h2>Pick a Background Type</h2> <hr style="height: 1px; border: solid;border-width: 0; color: black; width: 100%; background-color: black;"> </div> <div class="row"> <input type="radio" name="bgTypeBtn" id="color" value="color" checked onchange="color()"> <label for="color">Solid Color</label> <input type="radio" name="bgTypeBtn" id="gradient" value="gradient" onchange="gradient()"> <label for="gradient">Gradient</label> <input type="radio" name="bgTypeBtn" id="image" value="image" onchange="image()"> <label for="image">Image</label> </div> </div></body>
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JavaScript