![]() IE / Edge |
![]() Firefox |
![]() Chrome |
![]() Safari |
![]() Electron |
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IE8+, Edge | last 2 versions | last 2 versions | last 2 versions | last 2 versions |
npm install parabola-js
yarn add parabola-js
https://cdn.jsdelivr.net/npm/parabola-js@1.0.1/lib/parabola.js
源自 zhangxinxu(.com) http://www.zhangxinxu.com/wordpress/?p=3855,做了些许更改
param | type |
---|---|
element | Node |
target | Node |
options? | object |
options | type | default | description |
---|---|---|---|
speed | number | 166.67 |
A每帧移动的像素大小,每帧(对于大部分显示屏)大约16~17毫秒 |
curvature | number | 0.001 |
曲率, 实际指焦点到准线的距离,你可以抽象成曲率,这里模拟扔物体的抛物线,因此是开口向下的 |
endScale | string | 1 |
缩放 |
import React, { Component, createRef } from 'react';
import Parabola from 'parabola-js'
import styles from './pjs.less';
class ParabolaDemo extends Component {
constructor() {
super();
this.wrap = createRef();
this.item1 = createRef();
this.item2 = createRef();
}
handleClick = e => {
const rect = this.wrap.current.getBoundingClientRect();
const diffX = e.clientX - rect.left + this.wrap.current.scrollLeft;
const diffY = e.clientY - rect.top + this.wrap.current.scrollLeft;
this.item2.current.style.left = diffX + 'px';
this.item2.current.style.top = diffY + 'px';
+ new Parabola(this.item1.current, this.item2.current).init()
}
render() {
return (
<div>
抛物线测试
<hr/>
<div ref={this.wrap} className={styles.wrap} onClick={this.handleClick}>
<div ref={this.item1} className={styles.item1} />
<div ref={this.item2} className={styles.item2} />
</div>
</div>
)
}
}
export default ParabolaDemo;
by zhangxinxu(.com) https://www.zhangxinxu.com/study/201312/js-parabola-shopping.html