vue 折叠展示多行文本组件的实现代码
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2022-03-07 23:13:13
折叠展示多行文本组件折叠展示多行文本组件，自动根据传入的expand判断是否需要折叠两种模式：展开/收起展示全文本（默认）、popover展示全文本先上代码 <...
折叠展示多行文本组件
折叠展示多行文本组件，自动根据传入的expand判断是否需要折叠
两种模式：展开/收起展示全文本（默认）、popover展示全文本
先上代码
<template>
<div class="text-expand" ref="textexpand">
<div v-if="!(showpopover && showpopoverjudge)">
<span class="text-expand-content" :style="expandstyle">
{{ (text === null || text === undefined || text === '') ? '--' : text }}
</span>
<div class="expander">
<span
v-if="showbtn && showbtnjudge"
>
<span
v-if="!showfull"
class="action action-expand"
@click.stop="showfullfn(true)"
>
展开
<i v-if="showbtnicon" class="iconfont iconxiajiantou" />
</span>
<span
v-else
class="action action-pack"
@click.stop="showfullfn(false)"
>
收起
<i v-if="showbtnicon" class="iconfont iconshangjiantou" />
</span>
</span>
</div>
</div>
<el-popover
v-else
:placement="popoverplace"
trigger="hover">
<div class="popover-content">
{{ text }}
</div>
<span class="text-expand-content" :style="expandstyle" slot="reference">{{ text }}</span>
</el-popover>
</div>
</template>
<script>
export default {
name: "textexpand",
props: {
text: { // 文本内容
type: string,
default: () => ''
},
expand: { // 折叠显示行数
type: number,
default: () => 3
},
showbtn: { // 展开、折叠按钮
type: boolean,
default: true
},
showbtnicon: { // 展开、折叠icon
type: boolean,
default: true
},
showpopover: { // popover显示全文本
type: boolean,
default: false
},
popoverplace: { // popover位置
type: string,
default: 'bottom'
}
},
data () {
return {
showfull: false, // 是否展示全文本
expandstyle: '',
showbtnjudge: false, // 判断是否需要折叠展示按钮
showpopoverjudge: false // 判断是否需要折叠展示popover
}
},
watch: {
text: function (val) {
this.judgeexpand()
}
},
mounted () {
this.judgeexpand()
},
methods: {
showfullfn (value) {
this.expandstyle = value ? '' : `display: -webkit-box;word-break: break-all;-webkit-line-clamp: ${this.expand};-webkit-box-orient: vertical;text-overflow: ellipsis;overflow: hidden;`
this.showfull = value
},
judgeexpand () { // 判断是否需要折叠
this.$nexttick(() => {
const { expand } = this;
const textexpandstyle = window.getcomputedstyle(this.$refs.textexpand)
const textexpandheight = parsefloat(textexpandstyle.height) //获取总高度
const textexpandlineheight = parsefloat(textexpandstyle.lineheight) //获取行高
// 计算行高
const rects = math.ceil(textexpandheight / textexpandlineheight)
if (rects <= expand) { // 不需要折叠展示
this.showbtnjudge = false
this.showpopoverjudge = false
} else {
this.showbtnjudge = true
this.showpopoverjudge = true
this.expandstyle = `display: -webkit-box;word-break: break-all;-webkit-line-clamp: ${this.expand};-webkit-box-orient: vertical;text-overflow: ellipsis;overflow: hidden;`
}
})
}
}
}
</script>
<style lang="less" scoped>
.text-expand{
&-content{
word-break: break-all;
white-space: pre-wrap;
}
.expander {
text-align: left;
margin-top: 6px;
.action {
display: inline-block;
font-size: 14px;
color: #0281f0;
cursor: pointer;
i {
display: inline;
font-size: 12px;
}
}
.action.action-pack {
margin-left: 0;
}
}
}
.popover-content{
max-width: 40vw;
max-height: 30vh;
overflow: hidden;
word-break: break-all;
overflow-y: auto;
}
</style>
用法
<text-expand :text="text" :expand="2" />
<text-expand :text="text" :expand="2" :showbtnicon="false">
<text-expand :text="text" :expand="2" :showpopover="true">
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