我想在您输入时将输入格式化为美元货币。输入将有2个小数位,并将从右到左输入。 假设我输入54.60,它将输入$ 0.05 - > $ 0.54 - > $ 5.46 - > $ 54.60。这个PLUNKER完全是这样做的,但它的角度为js。到目前为止,我的指令看起来像:
import {Directive, Output, EventEmitter} from '@angular/core';
import {NgControl} from '@angular/forms';
@Directive({
selector: '[formControlName][currency]',
host: {
'(ngModelChange)': 'onInputChange($event)',
'(keydown.backspace)':'onInputChange($event.target.value, true)'
}
})
export class CurrencyMask {
constructor(public model: NgControl) {}
@Output() rawChange:EventEmitter<string> = new EventEmitter<string>();
onInputChange(event: any, backspace: any) {
// remove all mask characters (keep only numeric)
var newVal = event.replace(/\D/g, '');
var rawValue = newVal;
var str = (newVal=='0'?'0.0':newVal).split('.');
str[1] = str[1] || '0';
newVal= str[0].replace(/(\d)(?=(\d\d\d)+(?!\d))/g, '$1,') + '.' + (str[1].length==1?str[1]+'0':str[1]);
// set the new value
this.model.valueAccessor.writeValue(newVal);
this.rawChange.emit(rawValue)
}
}
并在html中用作:
<input name="cost" placeholder="cost" class="form-control" type="text" currency formControlName="cost" (rawChange)="rawCurrency=$event">
更新
最终对我有用的是:
onInputChange(event: any, backspace: any) {
var newVal = (parseInt(event.replace(/[^0-9]/g, ''))/100).toLocaleString('en-US', { minimumFractionDigits: 2 });
var rawValue = newVal;
if(backspace) {
newVal = newVal.substring(0, newVal.length - 1);
}
if(newVal.length == 0) {
newVal = '';
}
else {
newVal = newVal;
}
// set the new value
this.model.valueAccessor.writeValue(newVal);
this.rawChange.emit(rawValue)
}
答案 0 :(得分:2)
使用以下
// remove dot and comma's, 123,456.78 -> 12345678
var strVal = myVal.replace(/\.,/g,'');
// change string to integer
var intVal = parseInt(strVal);
// divide by 100 to get 0.05 when pressing 5
var decVal = intVal / 100;
// format value to en-US locale
var newVal = decVal.toLocaleString('en-US', { minimumFractionDigits: 2 });
// or in singel line
var newVal = (parseInt(myVal.replace(/\.,/g, '')) / 100).toLocaleString('en-US', { minimumFractionDigits: 2 });
或
仅使用
使用货币管道格式化为USD格式var newVal = (parseInt(myVal.replace(/\.,/g, '')) / 100)
希望这有帮助。
答案 1 :(得分:0)
Angular具有formatCurrency方法
https://angular.io/api/common/formatCurrency
这是我在代码中使用它的方式:
需求是一个formControl
formatMoney(value: string) {
this.demand.setValue(
this.formatMoneyBase(value)
);
}
formatMoneyBase(value: string = ''): string {
return value.length ? formatCurrency(parseFloat(value.replace(/\D/g, '')), 'en', '$').replace('$', '') : '';
}