使用 Angular 2 将焦点放在下一个输入字段并按下 Enter 键 [英] Using Angular 2 focus on next input field with enter key press
本文介绍了使用 Angular 2 将焦点放在下一个输入字段并按下 Enter 键的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是 angular 2 的新手.如何在 Angular 2 中将焦点移到下一个控制键输入.我 实现此代码但如何无法正常工作.请建议我如何做到这一点.谢谢
I am new in angular 2. How can I move focus to next control on key enter in Angular 2. I implement this code but how not working properly. Please suggest me how I do this. Thanks
我的组件代码
import { Component,Injectable,Inject,OnInit, OnDestroy, EventEmitter, Output, Directive, ElementRef, HostListener, Input, Renderer } from '@angular/core';
import {Http, Response} from '@angular/http';
import {TestService} from '../../services/test.service';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import { RouterModule } from '@angular/router';
import { ActivatedRoute,Params } from '@angular/router';
@Component({
selector : 'test_block',
templateUrl : './partials/test_block.html',
providers: [TestService]
})
@Directive({
selector: '[test_block]'
})
export class TestComponent {
private el: ElementRef;
@Input() test_block: any;
branch_outstanding:any = [];
charges:any = [];
searched_charges:any = [];
constructor(private test_service:TestService, @Inject(ActivatedRoute) private route: ActivatedRoute, private _el: ElementRef,public renderer: Renderer) {
this.el = this._el;
}
@HostListener('keydown', ['$event']) onKeyDown(e:any) {
if ((e.which == 13 || e.keyCode == 13)) {
e.preventDefault();
let control:any;
control = e.srcElement.nextElementSibling;
while (true){
if (control) {
if ((!control.hidden) &&
(control.nodeName == 'INPUT' ||
control.nodeName == 'SELECT' ||
control.nodeName == 'BUTTON' ||
control.nodeName == 'TEXTAREA'))
{
control.focus();
return;
}else{
control = control.nextElementSibling;
}
}
else {
console.log('close keyboard');
return;
}
}
}
}
}
在控制台中显示错误:
未处理的承诺拒绝:无法编译TestComponent",因为它不是组件.;区域: ;任务:Promise.then;值:错误:无法编译TestComponent",因为它不是组件.
Unhandled Promise rejection: Could not compile 'TestComponent' because it is not a component. ; Zone: ; Task: Promise.then ; Value: Error: Could not compile 'TestComponent' because it is not a component.
我不知道这段代码有什么问题.请推荐我.
I don't know what is issue on this code. Please suggest me.
推荐答案
终于得到解决方案
- 我为 TestComponent 提到了 @Component 和 @Directive 创建了两个不同的装饰器.
- 在@Directive之后,我像这样导入到我的
test.module.ts
import { TestDirective } from './test.directive';
- 在html中绑定
<input test_block type="text">
很重要,如果你没有绑定test_block
那么代码就不能正常工作
- I created two different decorators for TestComponent mention @Component and @Directive.
- After that @Directive I import in to my
test.module.ts
like this
import { TestDirective } from './test.directive';
- It's very important in html bind
<input test_block type="text">
if you not bindtest_block
then code not working properly
这篇关于使用 Angular 2 将焦点放在下一个输入字段并按下 Enter 键的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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