嘿我想在用户手动输入出生日期时添加破折号。像这样08-18-2019但我无法做到这一点
public dateOfBirth: { year: number; month: number; day: number };
html文件
<input
ngbDatepicker
dobMask
#d="ngbDatepicker"
#dobF="ngModel"
class="form-control input-underline input-lg"
id="dob"
[(ngModel)]="dateOfBirth"
placeholder="mm-dd-yyyy"
name="dp"
[ngClass]="{
invalid:
(dobF.value === null || isString(dobF.value) || futureDate) && dobF.touched
}"
required
/>
我试过指示,但结果是这样的东西11 --------- 3
这是我的指令代码
@Directive({
selector: '[dobMask]'
})
export class DobDirective {
@HostListener('input', ['$event'])
onKeyDown(event: KeyboardEvent) {
const input = event.target as HTMLInputElement;
let trimmed = input.value.replace(/\s+/g, '');
if (trimmed.length > 8) {
trimmed = trimmed.substr(0, 8);
}
let numbers = [];
for (let i = 0; i < trimmed.length; i += 2) {
numbers.push(trimmed.substr(i, 2));
}
input.value = numbers.join('-');
}
}
这就是我得到的
我的预期结果是08-17-2019
任何人都可以帮我,我怎么能实现这一目标?
修改了你的指令一点点,它的工作正常
import {Directive,HostListener} from '@angular/core'
@Directive({
selector: '[dobMask]'
})
export class DobDirective {
@HostListener('input', ['$event'])
onKeyDown(event: KeyboardEvent) {
const input = event.target as HTMLInputElement;
let trimmed = input.value.replace(/\s+/g, '');
if (trimmed.length > 10) {
trimmed = trimmed.substr(0, 10);
}
trimmed = trimmed.replace(/-/g,'');
let numbers = [];
numbers.push(trimmed.substr(0,2));
if(trimmed.substr(2,2)!=="")
numbers.push(trimmed.substr(2,2));
if(trimmed.substr(4,4)!="")
numbers.push(trimmed.substr(4,4));
input.value = numbers.join('-');
}
}
检查一下
您可能希望像这样使用ngModelChange:
<input [ngModel]="dateOfBirth" (ngModelChange)="updateDateOfBirth($event)">
然后在控制器.ts文件中:
updateDateOfBirth(dob) {
// some logic to insert hyphens if it is in a valid format
// pseduocode:
// IF dob matches required format THEN
// dob = dob with Hyphens inserted
this.dateOfBirth = dob
}
由于绑定[ngModel]="dateOfBirth"
,dob将在表单控件中更新