Javascript 如果api响应中没有数据,则显示div
如果api响应中未收到数据,则显示div。下面的方法是最好的方法吗?现在,如果我用getAll()方法点击搜索按钮,搜索框中没有任何内容,我将显示Div。但是如果我单击div away(关闭按钮)并重试,div不会出现吗?我必须循环函数吗?仅供参考,我也在使用引导 组件。tsJavascript 如果api响应中没有数据,则显示div,javascript,html,angular,Javascript,Html,Angular,如果api响应中未收到数据,则显示div。下面的方法是最好的方法吗?现在,如果我用getAll()方法点击搜索按钮,搜索框中没有任何内容,我将显示Div。但是如果我单击div away(关闭按钮)并重试,div不会出现吗?我必须循环函数吗?仅供参考,我也在使用引导 组件。ts import { Component, OnInit } from '@angular/core'; import { ApiService } from '../../../services/api.service';
import { Component, OnInit } from '@angular/core';
import { ApiService } from '../../../services/api.service';
import { FormGroup, FormControl } from '@angular/forms';
import { FormBuilder } from '@angular/forms';
import { faSearch } from '@fortawesome/free-solid-svg-icons';
import { faRedo } from '@fortawesome/free-solid-svg-icons';
import { faHeadphones} from '@fortawesome/free-solid-svg-icons';
import { faExternalLinkAlt} from '@fortawesome/free-solid-svg-icons';
@Component({
selector: 'app-content',
templateUrl: './content.component.html',
styleUrls: ['./content.component.scss']
})
export class ContentComponent {
public data = [];
public apiData: any;
public loading = false;
public noData = false;
p: number = 1;
faSearch = faSearch;
faRedo = faRedo;
faHeadphones = faHeadphones;
faExternalLinkAlt = faExternalLinkAlt;
searchQuery : string = "";
constructor(private service: ApiService) { }
getAll() {
this.service.getAll(this.searchQuery).subscribe((results) => {
this.loading = true;
console.log('Data is received - Result - ', results);
this.data = results.results;
this.loading = false;
if (this.data.length <= 0) {
this.noData = true;
} else if (this.data.length >= 1) {
this.noData = false;
} else {
this.noData = true;
}
})
}
refresh(): void {
window.location.reload();
}
Search(){
this.service.getAll(this.searchQuery).subscribe((results) => {
this.loading = true;
console.log('Data is received - Result - ', results);
this.data = results.results;
this.loading = false;
})
}
ngOnInit() {
}
}
noData() {
this.noData = false;
}
从'@angular/core'导入{Component,OnInit};
从“../../../services/api.service”导入{ApiService};
从'@angular/forms'导入{FormGroup,FormControl};
从'@angular/forms'导入{FormBuilder};
从“@fortwome/free solid svg icons”导入{faSearch};
从“@fortawesome/free solid svg icons”导入{faRedo};
从“@fortwome/free solid svg icons”导入{faHeadphones};
从“@fortwome/free solid svg icons”导入{faExternalLinkAlt};
@组成部分({
选择器:“应用程序内容”,
templateUrl:'./content.component.html',
样式URL:['./content.component.scss']
})
导出类ContentComponent{
公共数据=[];
公共数据:任何;
公共加载=错误;
公共noData=false;
p:数字=1;
faSearch=faSearch;
法雷多=法雷多;
faHeadphones=faHeadphones;
faExternalLinkAlt=faExternalLinkAlt;
searchQuery:string=“”;
构造函数(私有服务:ApiService){}
getAll(){
this.service.getAll(this.searchQuery).subscribe((结果)=>{
这是。加载=真;
log('接收到数据-结果-',结果);
this.data=results.results;
这一点:加载=错误;
如果(this.data.length=1){
this.noData=false;
}否则{
this.noData=true;
}
})
}
刷新():无效{
window.location.reload();
}
搜索(){
this.service.getAll(this.searchQuery).subscribe((结果)=>{
这是。加载=真;
log('接收到数据-结果-',结果);
this.data=results.results;
这一点:加载=错误;
})
}
恩戈尼尼特(){
}
}
html
<ng-container *ngIf="noData">
<div class="container">
<div class="alert alert-warning alert-dismissible fade show" role="alert">
<strong>Holy guacamole!</strong> You should check in on some of those fields below.
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
</div>
</ng-container>
神圣的鳄梨酱您应该在下面的一些字段中签入。
&时代;
试试这个,应该可以
if (this.data.length != 0) {
this.noData = true;
} else if (this.data.length == 0) {
this.noData = false;
} else {
this.noData = true;
}
})
或
最后,我刚刚从按钮中删除了
data dismise=“alert”
,并基于noData
变量为关闭按钮添加了(单击)功能
Html
<button type="button" class="close" (click)="noData()" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
首先,我建议您从“容器”中取出ngIf,因为这可能会导致角度的问题。。。我使用数组的lenght属性来实现这一点
<ng-container>
<div class="container">
<div *ngIf="data.length == 0" class="alert alert-warning alert-dismissible fade show" role="alert">
<strong>Holy guacamole!</strong> You should check in on some of those fields below.
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
</div>
</ng-container>
试试这个。为您效劳
getAll() {
this.service.getAll(this.searchQuery).subscribe((results) => {
this.loading = true;
this.data = results.results;
this.loading = false;
})
}
在html中
<div *ngIf="data?.length===0">No Data</div>
<div *ngIf="data && data?.length !== 0">Result</div>
无数据
结果
此标记是否有结束标记?您在哪里对ngOnit调用此方法getAll()?但在clickcondition调用getAll()是错误的..您说如果数据长度小于或等于显示div..这是错误的请尝试我的回答是上面更新的。更新我的条件并删除html中可忽略的警报..然后它可能会工作。
getAll() {
this.service.getAll(this.searchQuery).subscribe((results) => {
this.loading = true;
this.data = results.results;
this.loading = false;
})
}
<div *ngIf="data?.length===0">No Data</div>
<div *ngIf="data && data?.length !== 0">Result</div>