vue-popper.js
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import Vue from 'vue';
import {
PopupManager
} from 'element-ui/src/utils/popup';
const PopperJS = Vue.prototype.$isServer ? function() {} : require('./popper');
const stop = e => e.stopPropagation();
/**
* @param {HTMLElement} [reference=$refs.reference] - The reference element used to position the popper.
* @param {HTMLElement} [popper=$refs.popper] - The HTML element used as popper, or a configuration used to generate the popper.
* @param {String} [placement=button] - Placement of the popper accepted values: top(-start, -end), right(-start, -end), bottom(-start, -end), left(-start, -end)
* @param {Number} [offset=0] - Amount of pixels the popper will be shifted (can be negative).
* @param {Boolean} [visible=false] Visibility of the popup element.
* @param {Boolean} [visible-arrow=false] Visibility of the arrow, no style.
*/
export default {
props: {
transformOrigin: {
type: [Boolean, String],
default: true
},
placement: {
type: String,
default: 'bottom'
},
boundariesPadding: {
type: Number,
default: 5
},
reference: {},
popper: {},
offset: {
default: 0
},
value: Boolean,
visibleArrow: Boolean,
arrowOffset: {
type: Number,
default: 35
},
appendToBody: {
type: Boolean,
default: true
},
popperOptions: {
type: Object,
default() {
return {
gpuAcceleration: false
};
}
}
},
data() {
return {
showPopper: false,
currentPlacement: ''
};
},
watch: {
value: {
immediate: true,
handler(val) {
this.showPopper = val;
this.$emit('input', val);
}
},
showPopper(val) {
if (this.disabled) return;
val ? this.updatePopper() : this.destroyPopper();
this.$emit('input', val);
}
},
methods: {
createPopper() {
if (this.$isServer) return;
this.currentPlacement = this.currentPlacement || this.placement;
if (!/^(top|bottom|left|right)(-start|-end)?$/g.test(this.currentPlacement)) {
return;
}
const options = this.popperOptions;
const popper = this.popperElm = this.popperElm || this.popper || this.$refs.popper;
let reference = this.referenceElm = this.referenceElm || this.reference || this.$refs.reference;
if (!reference &&
this.$slots.reference &&
this.$slots.reference[0]) {
reference = this.referenceElm = this.$slots.reference[0].elm;
}
if (!popper || !reference) return;
if (this.visibleArrow) this.appendArrow(popper);
if (this.appendToBody) document.body.appendChild(this.popperElm);
if (this.popperJS && this.popperJS.destroy) {
this.popperJS.destroy();
}
options.placement = this.currentPlacement;
options.offset = this.offset;
options.arrowOffset = this.arrowOffset;
this.popperJS = new PopperJS(reference, popper, options);
this.popperJS.onCreate(_ => {
this.$emit('created', this);
this.resetTransformOrigin();
this.$nextTick(this.updatePopper);
});
if (typeof options.onUpdate === 'function') {
this.popperJS.onUpdate(options.onUpdate);
}
this.popperJS._popper.style.zIndex = PopupManager.nextZIndex();
this.popperElm.addEventListener('click', stop);
},
updatePopper() {
const popperJS = this.popperJS;
if (popperJS) {
popperJS.update();
if (popperJS._popper) {
popperJS._popper.style.zIndex = PopupManager.nextZIndex();
}
} else {
this.createPopper();
}
},
doDestroy(forceDestroy) {
/* istanbul ignore if */
if (!this.popperJS || (this.showPopper && !forceDestroy)) return;
this.popperJS.destroy();
this.popperJS = null;
},
destroyPopper() {
if (this.popperJS) {
this.resetTransformOrigin();
}
},
resetTransformOrigin() {
if (!this.transformOrigin) return;
let placementMap = {
top: 'bottom',
bottom: 'top',
left: 'right',
right: 'left'
};
let placement = this.popperJS._popper.getAttribute('x-placement').split('-')[0];
let origin = placementMap[placement];
this.popperJS._popper.style.transformOrigin = typeof this.transformOrigin === 'string'
? this.transformOrigin
: ['top', 'bottom'].indexOf(placement) > -1 ? `center ${ origin }` : `${ origin } center`;
},
appendArrow(element) {
let hash;
if (this.appended) {
return;
}
this.appended = true;
for (let item in element.attributes) {
if (/^_v-/.test(element.attributes[item].name)) {
hash = element.attributes[item].name;
break;
}
}
const arrow = document.createElement('div');
if (hash) {
arrow.setAttribute(hash, '');
}
arrow.setAttribute('x-arrow', '');
arrow.className = 'popper__arrow';
element.appendChild(arrow);
}
},
beforeDestroy() {
this.doDestroy(true);
if (this.popperElm && this.popperElm.parentNode === document.body) {
this.popperElm.removeEventListener('click', stop);
document.body.removeChild(this.popperElm);
}
},
// call destroy in keep-alive mode
deactivated() {
this.$options.beforeDestroy[0].call(this);
}
};