What’s JS?
JavaScript（简称“JS”） 是一种具有函数优先的轻量级，解释型或即时编译型的编程语言。虽然它是作为开发Web页面的脚本语言而出名，但是它也被用到了很多非浏览器环境中，JavaScript 基于原型编程、多范式的动态脚本语言，并且支持面向对象、命令式、声明式、函数式编程范式。
以Mkdocs为例
在docs/javascripts/extra.js下复制粘贴：
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| var CURSOR;
Math.lerp = (a, b, n) => (1 - n) * a + n * b;
const getStyle = (el, attr) => {
try {
return window.getComputedStyle
? window.getComputedStyle(el)[attr]
: el.currentStyle[attr];
} catch (e) {}
return "";
};
class Cursor {
constructor() {
this.pos = {curr: null, prev: null};
this.pt = [];
this.create();
this.init();
this.render();
}
move(left, top) {
this.cursor.style["left"] = `${left}px`;
this.cursor.style["top"] = `${top}px`;
}
create() {
if (!this.cursor) {
this.cursor = document.createElement("div");
this.cursor.id = "cursor";
this.cursor.classList.add("hidden");
document.body.append(this.cursor);
}
var el = document.getElementsByTagName('*');
for (let i = 0; i < el.length; i++)
if (getStyle(el[i], "cursor") == "pointer")
this.pt.push(el[i].outerHTML);
document.body.appendChild((this.scr = document.createElement("style")));
this.scr.innerHTML = `* {cursor: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8' width='8px' height='8px'><circle cx='4' cy='4' r='4' opacity='.5'/></svg>") 4 4, auto}`;
}
refresh() {
this.scr.remove();
this.cursor.classList.remove("hover");
this.cursor.classList.remove("active");
this.pos = {curr: null, prev: null};
this.pt = [];
this.create();
this.init();
this.render();
}
init() {
document.onmouseover = e => this.pt.includes(e.target.outerHTML) && this.cursor.classList.add("hover");
document.onmouseout = e => this.pt.includes(e.target.outerHTML) && this.cursor.classList.remove("hover");
document.onmousemove = e => {(this.pos.curr == null) && this.move(e.clientX - 8, e.clientY - 8); this.pos.curr = {x: e.clientX - 8, y: e.clientY - 8}; this.cursor.classList.remove("hidden");};
document.onmouseenter = e => this.cursor.classList.remove("hidden");
document.onmouseleave = e => this.cursor.classList.add("hidden");
document.onmousedown = e => this.cursor.classList.add("active");
document.onmouseup = e => this.cursor.classList.remove("active");
}
render() {
if (this.pos.prev) {
this.pos.prev.x = Math.lerp(this.pos.prev.x, this.pos.curr.x, 0.15);
this.pos.prev.y = Math.lerp(this.pos.prev.y, this.pos.curr.y, 0.15);
this.move(this.pos.prev.x, this.pos.prev.y);
} else {
this.pos.prev = this.pos.curr;
}
requestAnimationFrame(() => this.render());
}
}
(() => {
CURSOR = new Cursor();
})();
|
其中比较重要的参数就是鼠标的尺寸和颜色，已经在上图中标出，目前发现颜色只支持RGB写法和固有名称写法（例如red这种），其他参数也可以自行摸索：
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| * {cursor: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8' width='8px' height='8px'><circle cx='4' cy='4' r='4' opacity='1.0' fill='rgb(57, 197, 187)'/></svg>") 4 4, auto}`
|
在docs/stylesheets/extra.css添加如下代码：
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|
#cursor {
position: fixed;
width: 16px;
height: 16px;
background: var(--theme-color);
border-radius: 8px;
opacity: 0.25;
z-index: 10086;
pointer-events: none;
transition: 0.2s ease-in-out;
transition-property: background, opacity, transform;
}
#cursor.hidden {
opacity: 0;
}
#cursor.hover {
opacity: 0.1;
transform: scale(2.5);
-webkit-transform: scale(2.5);
-moz-transform: scale(2.5);
-ms-transform: scale(2.5);
-o-transform: scale(2.5);
}
#cursor.active {
opacity: 0.5;
transform: scale(0.5);
-webkit-transform: scale(0.5);
-moz-transform: scale(0.5);
-ms-transform: scale(0.5);
-o-transform: scale(0.5);
}
|
这里比较重要的参数就是鼠标跟随的圆形颜色，可以根据自己的喜好进行更改：
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| #cursor {
background: rgb(57, 197, 187);
}
|
“注意⚠️”
需要在mkdocs.yml中引入js和css
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| extra_javascript:
- javascripts/extra.js
- javascripts/mathjax.js
extra_css:
- stylesheets/extra.css
|
