我添加了一个模块,让我在输入上放置一个掩码。
此模块使用属性'textMask'和掩码和选项的值(例如:[textMask]="{mask: dateMask, placeholderChar: '\u2000', keepCharPositions: true}"
和代码隐藏:public dateMask = [/[0-3]/, /\d/, "/", /[0-1]/, /\d/, "/", /[12]/, /[09]/, /\d/, /\d/];
用于法语日期掩码)。
我不想将这个掩码添加到每个组件的每个日期输入和代码后面,而是希望制作一个指令,将该属性添加到每个日期输入中。
所以,我这样做了:
import { Directive, ElementRef, Renderer } from '@angular/core';
@Directive({
selector: 'input[matDatepicker]'
})
export class DateMaskDirective {
constructor(private el: ElementRef<HTMLElement>, private renderer: Renderer) {
this.renderer.setElementAttribute(this.el.nativeElement, '[textMask]', '{ mask: [/[0-3]/, /\d/, "/", /[0-1]/, /\d/, "/", /[12]/, /[09]/, /\d/, /\d/], placeholderChar: "\u2000", keepCharPositions: true }');
}
}
问题是,即使添加了属性,掩码模块也不会解释它。这是优先考虑的问题吗?我该如何解决这个问题?
链接到掩码模块:https://github.com/text-mask/text-mask/tree/master/angular2#readme
编辑
我试过Daniel Hilgarth的解决方案(派生掩码指令),如下所示:
import { Directive, ElementRef, Renderer2 } from '@angular/core';
import { MaskedInputDirective, TextMaskConfig } from 'angular2-text-mask';
@Directive({
selector: 'input[matDatepicker]'
})
export class DateMaskDirective extends MaskedInputDirective {
public textMaskConfig: TextMaskConfig = {
mask: [/[0-3]/, /\d/, "/", /[0-1]/, /\d/, "/", /[12]/, /[09]/, /\d/, /\d/],
guide: true,
placeholderChar: '\u2000',
keepCharPositions: true,
showMask: true
}
constructor(private el: ElementRef<any>, private renderer: Renderer2, _compositionMode: boolean) {
super(renderer, el, _compositionMode);
}
}
但是我得到以下Angular错误:
ERROR Error: StaticInjectorError(AppModule)[DateMaskDirective -> Boolean]:
StaticInjectorError(Platform: core)[DateMaskDirective -> Boolean]:
NullInjectorError: No provider for Boolean!
at NullInjector.push../ node_modules /@angular/core/fesm5 / core.js.NullInjector.get(core.js: 691)
at resolveToken(core.js: 928)
at tryResolveToken(core.js: 872)
at StaticInjector.push../ node_modules /@angular/core/fesm5 / core.js.StaticInjector.get(core.js: 769)
at resolveToken(core.js: 928)
at tryResolveToken(core.js: 872)
at StaticInjector.push../ node_modules /@angular/core/fesm5 / core.js.StaticInjector.get(core.js: 769)
at resolveNgModuleDep(core.js: 17435)
at NgModuleRef_.push../ node_modules /@angular/core/fesm5 / core.js.NgModuleRef_.get(core.js: 18124)
at resolveDep(core.js: 18495)
那不是属性。这是它自己的指令。一种可能的解决方案是从他们的指令派生你的指令。
尝试这样的事情(未经测试,但重要的是布尔构造函数参数上的装饰器):
import { Directive, ElementRef, Renderer2 } from '@angular/core';
import { MaskedInputDirective, TextMaskConfig } from 'angular2-text-mask';
@Directive({
selector: 'input[matDatepicker]'
})
export class DateMaskDirective extends MaskedInputDirective {
public textMaskConfig: TextMaskConfig = {
mask: [/[0-3]/, /\d/, "/", /[0-1]/, /\d/, "/", /[12]/, /[09]/, /\d/, /\d/],
guide: true,
placeholderChar: '\u2000',
keepCharPositions: true,
showMask: true
}
constructor(private el: ElementRef<any>, private renderer: Renderer2, @Optional() @Inject(COMPOSITION_BUFFER_MODE) _compositionMode: boolean) {
super(renderer, el, _compositionMode);
}
}