1.实现效果
老规矩,直接上最后的实现效果
2.实现原理
直接上代码文章来源:https://www.toymoban.com/news/detail-726688.html
<el-form-item class="diagmosisItem" label="诊断" v-scroll="handleScroll">
<el-select
size="small"
remote
filterable
clearable
:loading="getAllDiagnosisLoading"
v-model="queryObj.diagnosisDesc"
:remote-method="handleRemoteDisease"
@clear="handleClearDisease"
>
<el-option
v-for="item in allDiagnosisList"
:key="item.valueId"
:label="item.valueNo +' '+ item.valueDesc"
:value="item.valueDesc">
</el-option>
</el-select>
</el-form-item>
//js
//mothods
handleScroll() {
if(!this.scrollStop) {
this.diagnosisQuery.pageNo++
this.getAllDiagnosis(this.diagnosisQueryText, 'join')
}
},
// 远程搜索诊断
async handleRemoteDisease(keyword = '') {
this.diagnosisQueryText = keyword
this.getAllDiagnosis(keyword)
},
// 清除选中诊断
handleClearDisease() {
this.getAllDiagnosis('', 'clear')
},
//诊断列表
async getAllDiagnosis(val = '', type = 'search') {
try {
this.getAllDiagnosisLoading = true
this.scrollStop = false
let res = null
if(this.isHaveDiagnoseFlag) {
if(type =='search') {
this.diagnosisQuery ={
pageNo:0,
pageSize:100
}
res = await this.reqGetAllDiagnosis({
keyword:val,
pageNo:0,
pageSize:100
})
}
else if(type == 'join') {
res = await this.reqGetAllDiagnosis({
keyword:val,
...this.diagnosisQuery
})
}
else{
this.allDiagnosisList = this.allDiagnosisList
this.getAllDiagnosisLoading = false
}
}
if (res && res.success) {
if(type =='search') {
this.allDiagnosisList = res.data
}
else{
if(res.data.length == 0) {
this.scrollStop = true
}
this.allDiagnosisList = [...res.data, ...this.allDiagnosisList]
}
this.getAllDiagnosisLoading = false
}
} catch (error) {
this.getAllDiagnosisLoading = false
}
},
//主要看这里
directives:{
scroll:{
bind(el, binding) {
const SELECTNRAP_DON = el.querySelector('.el-select-dropdown .el-select-dropdown__wrap')
SELECTNRAP_DON.addEventListener( 'scroll', function() {
console.log(this.scrollHeight - this.scrollTop, this.clientHeight)
const CONDITION = this.scrollHeight - this.scrollTop <= this.clientHeight
if(CONDITION) {
binding.value()
}
})
}
}
},
scrollStop主要是用来诊断select移到底部不再请求数据,默认为false。思路反正就是到底了触发函数处理,pageNo++请求后端接口文章来源地址https://www.toymoban.com/news/detail-726688.html
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