bv-transition.js
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// Generic Bootstrap v4 fade (no-fade) transition component
//
// Assumes that `show` class is not required when
// the transition has finished the enter transition
// (show and fade classes are only applied during transition)
import { extend, mergeData } from '../../vue'
import { NAME_TRANSITION } from '../../constants/components'
import { PROP_TYPE_BOOLEAN, PROP_TYPE_OBJECT, PROP_TYPE_STRING } from '../../constants/props'
import { isPlainObject } from '../../utils/inspect'
import { makeProp } from '../../utils/props'
// --- Constants ---
const NO_FADE_PROPS = {
name: '',
enterClass: '',
enterActiveClass: '',
enterToClass: 'show',
leaveClass: 'show',
leaveActiveClass: '',
leaveToClass: ''
}
const FADE_PROPS = {
...NO_FADE_PROPS,
enterActiveClass: 'fade',
leaveActiveClass: 'fade'
}
// --- Props ---
export const props = {
// Has no effect if `trans-props` provided
appear: makeProp(PROP_TYPE_BOOLEAN, false),
// Can be overridden by user supplied `trans-props`
mode: makeProp(PROP_TYPE_STRING),
// Only applicable to the built in transition
// Has no effect if `trans-props` provided
noFade: makeProp(PROP_TYPE_BOOLEAN, false),
// For user supplied transitions (if needed)
transProps: makeProp(PROP_TYPE_OBJECT)
}
// --- Main component ---
// @vue/component
export const BVTransition = /*#__PURE__*/ extend({
name: NAME_TRANSITION,
functional: true,
props,
render(h, { children, data, props }) {
let transProps = props.transProps
if (!isPlainObject(transProps)) {
transProps = props.noFade ? NO_FADE_PROPS : FADE_PROPS
if (props.appear) {
// Default the appear classes to equal the enter classes
transProps = {
...transProps,
appear: true,
appearClass: transProps.enterClass,
appearActiveClass: transProps.enterActiveClass,
appearToClass: transProps.enterToClass
}
}
}
transProps = {
mode: props.mode,
...transProps,
// We always need `css` true
css: true
}
const dataCopy = { ...data }
delete dataCopy.props
return h(
'transition',
// Any transition event listeners will get merged here
mergeData(dataCopy, { props: transProps }),
children
)
}
})