我正在做一個創建背景漸變生成器的練習。我將顏色放入輸入中,它使用這兩種顏色從左到右創建漸變。到目前為止它作業正常,但現在我有一個隨機生成 RGB 顏色的按鈕,但我不知道如何將它應用于背景漸變。我知道這個按鈕可以作業,因為我有 console.log'd 它會吐出兩種不同的 rgb 顏色。
var css = document.querySelector("h3");
var color1 = document.querySelector(".color1");
var color2 = document.querySelector(".color2");
var body = document.getElementById("gradient");
var button1 = document.querySelector(".button1");
function setGradient() {
body.style.background =
"linear-gradient(to right, "
color1.value
", "
color2.value
")";
css.textContent = body.style.background ";";
}
function randomColorGenerator() {
var color1 = "rgb" "(" (Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
")" ";");
var color2 = "rgb" "(" (Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
")" ";");
}
color1.addEventListener("input", setGradient);
color2.addEventListener("input", setGradient);
button1.addEventListener("click", randomColorGenerator);
<body id="gradient" onload="setGradient()">
<h1>Background Generator</h1>
<input class="color1" type="color" name="color1" value="#00ff00">
<input class="color2" type="color" name="color2" value="#ff0000">
<h2>Current CSS Background</h2>
<button class='button1'>Random Color</button>
<h3></h3>
<script type="text/javascript" src="script.js"></script>
</body>
uj5u.com熱心網友回復:
- 轉換為十六進制
- 不要重復使用 color1/color2 變數
- 轉換前設定顏色
注意:很多人想要回圈第二種顏色,以防得到相同的值
const rgbToHex = rgb => '#' (rgb.match(/[0-9|.] /g).map((x, i) => i === 3 ? parseInt(255 * parseFloat(x)).toString(16) : parseInt(x).toString(16)).join('')).padStart(2, '0').toUpperCase();
var css = document.querySelector("h3");
var color1 = document.querySelector(".color1");
var color2 = document.querySelector(".color2");
var body = document.getElementById("gradient");
var button1 = document.querySelector(".button1");
function setGradient() {
body.style.background =
"linear-gradient(to right, "
color1.value
", "
color2.value
")";
css.textContent = body.style.background ";";
}
function randomColorGenerator() {
var col1 = "rgb" "(" (Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
")" ";");
var col2 = "rgb" "(" (Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
", "
Math.floor(Math.random() * 255)
")" ";");
console.log(col1)
color1.value=rgbToHex(col1)
color2.value=rgbToHex(col2)
console.log(color1.value,color2.value)
setGradient()
}
color1.addEventListener("input", setGradient);
color2.addEventListener("input", setGradient);
button1.addEventListener("click", randomColorGenerator);
<body id="gradient" onload="setGradient()">
<h1>Background Generator</h1>
<input class="color1" type="color" name="color1" value="#00ff00">
<input class="color2" type="color" name="color2" value="#ff0000">
<h2>Current CSS Background</h2>
<button class='button1'>Random Color</button>
<h3></h3>
<script type="text/javascript" src="script.js"></script>
</body>
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