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common_at_last.js
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common_at_last.js
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// button 涟漪效果
(function () {
function createRipple(event) {
const button = event.currentTarget;
const circle = document.createElement("span");
const diameter = Math.max(button.clientWidth, button.clientHeight);
const radius = diameter / 2;
circle.style.width = circle.style.height = `${diameter}px`;
circle.style.left = `${event.pageX - button.offsetLeft - radius}px`;
let offsetTop = button.offsetTop
let eventY = (function () {
let difPageY = Math.abs(event.pageY - offsetTop)
let difClientY = Math.abs(event.clientY - offsetTop)
return difPageY > difClientY ? event.clientY : event.pageY;
})()
circle.style.top = `${eventY - offsetTop - radius}px`;
circle.classList.add("ripple");
const ripple = button.getElementsByClassName("ripple")[0];
if (ripple) {
ripple.remove();
}
button.appendChild(circle);
}
const buttons = document.getElementsByTagName("button");
for (const button of buttons) {
button.addEventListener("click", createRipple);
}
})()