Want a directive in Angular2+ which takes only number and not using ElementRef which possess security risk
I am working in a project in Angular where there are many textboxes and I have to restrict the user to take only numbers ,I don't want to use any Javascript/Jquery code in Angular and wanted to use only Angular things so I created a directive but when I deployed the code ,the code build and deploy team told ElementRef possess security risk ,what are the other ways/alternative to accomplish these .My directive code is below .
import { Directive, ElementRef, HostListener } from '@angular/core';
@Directive({
selector: '[myNumberOnly]'
})
export class NumberOnlyDirective {
// Allow decimal numbers. The . is only allowed once to occur
private regex: RegExp = new RegExp(/^[0-9]+(.[0-9]*){0,1}$/g);
// Allow key codes for special events. Reflect :
// Backspace, tab, end, home
private specialKeys: Array<string> = [ 'Backspace', 'Tab', 'End', 'Home' ];
constructor(private el: ElementRef) {
}
@HostListener('keydown', [ '$event' ])
onKeyDown(event: KeyboardEvent) {
// Allow Backspace, tab, end, and home keys
if (this.specialKeys.indexOf(event.key) !== -1) {
return;
}
// Do not use event.keycode this is deprecated.
// See: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
let current: string = this.el.nativeElement.value;
// We need this because the current value on the DOM element
// is not yet updated with the value from this event
let next: string = current.concat(event.key);
if (next && !String(next).match(this.regex)) {
event.preventDefault();
}
}
}
javascript
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
migrated from superuser.com 2 days ago
This question came from our site for computer enthusiasts and power users.
add a comment |
I am working in a project in Angular where there are many textboxes and I have to restrict the user to take only numbers ,I don't want to use any Javascript/Jquery code in Angular and wanted to use only Angular things so I created a directive but when I deployed the code ,the code build and deploy team told ElementRef possess security risk ,what are the other ways/alternative to accomplish these .My directive code is below .
import { Directive, ElementRef, HostListener } from '@angular/core';
@Directive({
selector: '[myNumberOnly]'
})
export class NumberOnlyDirective {
// Allow decimal numbers. The . is only allowed once to occur
private regex: RegExp = new RegExp(/^[0-9]+(.[0-9]*){0,1}$/g);
// Allow key codes for special events. Reflect :
// Backspace, tab, end, home
private specialKeys: Array<string> = [ 'Backspace', 'Tab', 'End', 'Home' ];
constructor(private el: ElementRef) {
}
@HostListener('keydown', [ '$event' ])
onKeyDown(event: KeyboardEvent) {
// Allow Backspace, tab, end, and home keys
if (this.specialKeys.indexOf(event.key) !== -1) {
return;
}
// Do not use event.keycode this is deprecated.
// See: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
let current: string = this.el.nativeElement.value;
// We need this because the current value on the DOM element
// is not yet updated with the value from this event
let next: string = current.concat(event.key);
if (next && !String(next).match(this.regex)) {
event.preventDefault();
}
}
}
javascript
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
migrated from superuser.com 2 days ago
This question came from our site for computer enthusiasts and power users.
add a comment |
I am working in a project in Angular where there are many textboxes and I have to restrict the user to take only numbers ,I don't want to use any Javascript/Jquery code in Angular and wanted to use only Angular things so I created a directive but when I deployed the code ,the code build and deploy team told ElementRef possess security risk ,what are the other ways/alternative to accomplish these .My directive code is below .
import { Directive, ElementRef, HostListener } from '@angular/core';
@Directive({
selector: '[myNumberOnly]'
})
export class NumberOnlyDirective {
// Allow decimal numbers. The . is only allowed once to occur
private regex: RegExp = new RegExp(/^[0-9]+(.[0-9]*){0,1}$/g);
// Allow key codes for special events. Reflect :
// Backspace, tab, end, home
private specialKeys: Array<string> = [ 'Backspace', 'Tab', 'End', 'Home' ];
constructor(private el: ElementRef) {
}
@HostListener('keydown', [ '$event' ])
onKeyDown(event: KeyboardEvent) {
// Allow Backspace, tab, end, and home keys
if (this.specialKeys.indexOf(event.key) !== -1) {
return;
}
// Do not use event.keycode this is deprecated.
// See: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
let current: string = this.el.nativeElement.value;
// We need this because the current value on the DOM element
// is not yet updated with the value from this event
let next: string = current.concat(event.key);
if (next && !String(next).match(this.regex)) {
event.preventDefault();
}
}
}
javascript
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
I am working in a project in Angular where there are many textboxes and I have to restrict the user to take only numbers ,I don't want to use any Javascript/Jquery code in Angular and wanted to use only Angular things so I created a directive but when I deployed the code ,the code build and deploy team told ElementRef possess security risk ,what are the other ways/alternative to accomplish these .My directive code is below .
import { Directive, ElementRef, HostListener } from '@angular/core';
@Directive({
selector: '[myNumberOnly]'
})
export class NumberOnlyDirective {
// Allow decimal numbers. The . is only allowed once to occur
private regex: RegExp = new RegExp(/^[0-9]+(.[0-9]*){0,1}$/g);
// Allow key codes for special events. Reflect :
// Backspace, tab, end, home
private specialKeys: Array<string> = [ 'Backspace', 'Tab', 'End', 'Home' ];
constructor(private el: ElementRef) {
}
@HostListener('keydown', [ '$event' ])
onKeyDown(event: KeyboardEvent) {
// Allow Backspace, tab, end, and home keys
if (this.specialKeys.indexOf(event.key) !== -1) {
return;
}
// Do not use event.keycode this is deprecated.
// See: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
let current: string = this.el.nativeElement.value;
// We need this because the current value on the DOM element
// is not yet updated with the value from this event
let next: string = current.concat(event.key);
if (next && !String(next).match(this.regex)) {
event.preventDefault();
}
}
}
javascript
javascript
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
asked 2 days ago
Sarvesh GuptaSarvesh Gupta
3410
3410
migrated from superuser.com 2 days ago
This question came from our site for computer enthusiasts and power users.
migrated from superuser.com 2 days ago
This question came from our site for computer enthusiasts and power users.
add a comment |
add a comment |
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