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Angular Directive - input框输入数字,自动千分位分割
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import { CommonUtils } from 'src/shared/utils/common-utils'; | |
import { DecimalPipe } from '@angular/common'; | |
import { | |
Directive, | |
ElementRef, | |
forwardRef, | |
HostListener, | |
Input, | |
OnInit, | |
Renderer2 | |
} from '@angular/core'; | |
import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms'; | |
/** | |
* NumberMaskDirective | |
* | |
* @export | |
* @class NumberMaskDirective | |
*/ | |
@Directive({ | |
// tslint:disable-next-line: directive-selector | |
selector: 'input[numberMask]', | |
exportAs: 'numberMask', | |
providers: [ | |
{ | |
provide: NG_VALUE_ACCESSOR, | |
useExisting: forwardRef(() => NumberMaskDirective), | |
multi: true | |
} | |
] | |
}) | |
export class NumberMaskDirective implements OnInit, ControlValueAccessor { | |
@Input('numberMask') | |
public set numberMask(val: string) { | |
if (val) { | |
this.digits = val; | |
} | |
} | |
constructor( | |
private elementRef: ElementRef, | |
private decimalPipe: DecimalPipe, | |
private renderer: Renderer2 | |
) {} | |
private element: HTMLInputElement; | |
private digits = '1.0-7'; | |
public _onTouched = () => {}; | |
public _onChange = (_: any) => {}; | |
/** | |
* init directive | |
*/ | |
public ngOnInit(): void { | |
this.element = this.elementRef.nativeElement; | |
} | |
/** | |
* onFocus | |
* | |
* @param {string} value | |
* @memberof NumberMaskDirective | |
*/ | |
@HostListener('focus', ['$event.target.value']) | |
public onFocus(value: string): void { | |
this.element.value = this.removeComma(value); | |
} | |
/** | |
* onBlur | |
* | |
* @param {string} value | |
* @memberof NumberMaskDirective | |
*/ | |
@HostListener('blur', ['$event.target.value']) | |
public onBlur(value: string): void { | |
if (isNaN(Number(value))) { | |
this._onChange(value); | |
this._onTouched(); | |
return; | |
} | |
this.element.value = | |
parseFloat(value) < 1 && parseFloat(value) > 0 | |
? value | |
: this.decimalPipe.transform(value, this.digits); | |
this._onChange(this.removeComma(this.element.value)); | |
this._onTouched(); | |
} | |
/** | |
* implements ControlValueAccessor | |
* @param value | |
*/ | |
public writeValue(value: any): void { | |
if (!CommonUtils.isBlank(value) && !isNaN(value)) { | |
this.element.value = this.decimalPipe.transform(value, this.digits); | |
} | |
} | |
/** | |
* implements ControlValueAccessor | |
* @param fn | |
*/ | |
public registerOnChange(fn: (value: any) => any): void { | |
this._onChange = fn; | |
} | |
/** | |
* implements ControlValueAccessor | |
* @param fn | |
*/ | |
public registerOnTouched(fn: () => any): void { | |
this._onTouched = fn; | |
} | |
/** | |
* delete | |
* | |
* @param {string} target | |
* @memberof TelNoMaskDirective | |
*/ | |
private removeComma(target: string): string { | |
return target.replace(/,/g, ''); | |
} | |
/** | |
* implements isDisabled | |
* @param isDisabled | |
*/ | |
public setDisabledState(isDisabled: boolean): void { | |
this.renderer.setProperty(this.element, 'disabled', isDisabled); | |
} | |
} |
也可以在设置值时设置
this.form.get('name').patchValue('0001', {selfOnly: true});
当输入的值是1时,显示0001,form存储的还是1
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input框输入数字,自动千分位分割 例: 1000 -> 1,000 , 提交时的值时1000