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src/directive/waves/waves.js
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import './waves.css'
const context = '@@wavesContext'
function handleClick(el, binding) {
function handle(e) {
const customOpts = Object.assign({}, binding.value)
const opts = Object.assign({
ele: el, // 波纹作用元素
type: 'hit', // hit 点击位置扩散 center中心点扩展
color: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
},
customOpts
)
const target = opts.ele
if (target) {
target.style.position = 'relative'
target.style.overflow = 'hidden'
const rect = target.getBoundingClientRect()
let ripple = target.querySelector('.waves-ripple')
if (!ripple) {
ripple = document.createElement('span')
ripple.className = 'waves-ripple'
ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px'
target.appendChild(ripple)
} else {
ripple.className = 'waves-ripple'
}
switch (opts.type) {
case 'center':
ripple.style.top = rect.height / 2 - ripple.offsetHeight / 2 + 'px'
ripple.style.left = rect.width / 2 - ripple.offsetWidth / 2 + 'px'
break
default:
ripple.style.top =
(e.pageY - rect.top - ripple.offsetHeight / 2 - document.documentElement.scrollTop ||
document.body.scrollTop) + 'px'
ripple.style.left =
(e.pageX - rect.left - ripple.offsetWidth / 2 - document.documentElement.scrollLeft ||
document.body.scrollLeft) + 'px'
}
ripple.style.backgroundColor = opts.color
ripple.className = 'waves-ripple z-active'
return false
}
}
if (!el[context]) {
el[context] = {
removeHandle: handle
}
} else {
el[context].removeHandle = handle
}
return handle
}
export default {
bind(el, binding) {
el.addEventListener('click', handleClick(el, binding), false)
},
update(el, binding) {
el.removeEventListener('click', el[context].removeHandle, false)
el.addEventListener('click', handleClick(el, binding), false)
},
unbind(el) {
el.removeEventListener('click', el[context].removeHandle, false)
el[context] = null
delete el[context]
}
}
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