dropdown.vue
2.47 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
<template>
<div class="ivu-select-dropdown" :class="className" :style="styles"><slot></slot></div>
</template>
<script>
import Vue from 'vue';
const isServer = Vue.prototype.$isServer;
import { getStyle } from '../../utils/assist';
const Popper = isServer ? function() {} : require('popper.js/dist/umd/popper.js'); // eslint-disable-line
export default {
name: 'Drop',
props: {
placement: {
type: String,
default: 'bottom-start'
},
className: {
type: String
}
},
data () {
return {
popper: null,
width: ''
};
},
computed: {
styles () {
let style = {};
if (this.width) style.width = `${this.width}px`;
return style;
}
},
methods: {
update () {
if (isServer) return;
if (this.popper) {
this.$nextTick(() => {
this.popper.update();
});
} else {
this.$nextTick(() => {
this.popper = new Popper(this.$parent.$refs.reference, this.$el, {
placement: this.placement,
modifiers: {
computeStyle:{
gpuAcceleration: false,
}
}
});
});
}
// set a height for parent is Modal and Select's width is 100%
if (this.$parent.$options.name === 'iSelect') {
this.width = parseInt(getStyle(this.$parent.$el, 'width'));
}
},
destroy () {
if (this.popper) {
setTimeout(() => {
if (this.popper) {
this.popper.destroy();
this.popper = null;
}
}, 300);
}
}
},
created () {
this.$on('on-update-popper', this.update);
this.$on('on-destroy-popper', this.destroy);
},
beforeDestroy () {
if (this.popper) {
this.popper.destroy();
}
}
};
</script>