angular-otp-box
Version:
Angular otp input field component for web applications. Easy to integrate and use.
150 lines • 19.5 kB
JavaScript
import { Component, Input, Output, EventEmitter, ViewChildren } from '@angular/core';
import { FormGroup, FormControl } from '@angular/forms';
import { KeysPipe } from '../pipes/keys.pipe';
import { CounterDirective } from '../directives/timer.directive';
export class OtpInputComponent {
constructor(keysPipe) {
this.keysPipe = keysPipe;
this.setting = {
length: 4,
timer: 0,
timerType: 0
};
this.onValueChange = new EventEmitter();
this.inputControls = new Array(this.setting.length);
this.componentKey = Math.random().toString(36).substring(2) + (new Date()).getTime().toString(36);
}
ngOnInit() {
console.log(this.setting);
this.otpForm = new FormGroup({});
for (let index = 0; index < this.setting.length; index++) {
this.otpForm.addControl(this.getControlName(index), new FormControl());
}
}
ngAfterViewInit() {
let containerItem = document.getElementById(`c_${this.componentKey}`);
if (containerItem) {
let ele = containerItem.getElementsByClassName('.otp-input')[0];
if (ele && ele.focus) {
ele.focus();
}
}
}
getControlName(idx) {
return `ctrl_${idx}`;
}
isLeftArrow(e) {
return this.isKeyCode(e, 37);
}
isRightArrow(e) {
return this.isKeyCode(e, 39);
}
isBackspaceOrDelete(e) {
return e.key === "Backspace" || e.key === "Delete" || this.isKeyCode(e, 8) || this.isKeyCode(e, 46);
}
isKeyCode(e, targetCode) {
var key = e.keyCode || e.charCode;
if (key == targetCode) {
return true;
}
return false;
}
keyUp(e, inputIdx) {
let nextInputId = this.appendKey(`otp_${inputIdx + 1}`);
let prevInputId = this.appendKey(`otp_${inputIdx - 1}`);
if (this.isRightArrow(e)) {
this.setSelected(nextInputId);
return;
}
if (this.isLeftArrow(e)) {
this.setSelected(prevInputId);
return;
}
let isBackspace = this.isBackspaceOrDelete(e);
if (isBackspace && !e.target.value) {
this.setSelected(prevInputId);
this.rebuildValue();
return;
}
if (!e.target.value) {
return;
}
if (this.isValidEntry(e)) {
this.focusTo(nextInputId);
}
this.rebuildValue();
}
appendKey(id) {
return `${id}_${this.componentKey}`;
}
setSelected(eleId) {
this.focusTo(eleId);
let ele = document.getElementById(eleId);
if (ele && ele.setSelectionRange) {
setTimeout(() => {
ele.setSelectionRange(0, 1);
}, 0);
}
}
isValidEntry(e) {
var inp = String.fromCharCode(e.keyCode);
var isMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);
return isMobile || /[a-zA-Z0-9-_]/.test(inp) || (this.setting.allowKeyCodes && this.setting.allowKeyCodes.includes(e.keyCode)) || (e.keyCode >= 96 && e.keyCode <= 105);
}
focusTo(eleId) {
let ele = document.getElementById(eleId);
if (ele) {
ele.focus();
ele.selectionStart = ele.selectionEnd = 100;
}
}
rebuildValue() {
let val = '';
this.keysPipe.transform(this.otpForm.controls).forEach(k => {
if (this.otpForm.controls[k].value) {
val += this.otpForm.controls[k].value;
}
});
this.onValueChange.emit(val);
}
onCounterChange(e) {
this.counter = e;
if (this.counter == 0) {
this.onValueChange.emit(-1);
}
}
ressendOtp() {
this.CounterDirective.first.startTimer();
this.onValueChange.emit(-2);
}
formatSecsToMins(time) {
// Hours, minutes and seconds
var hrs = ~~(time / 3600);
var mins = ~~((time % 3600) / 60);
var secs = ~~time % 60;
// Output like "1:01" or "4:03:59" or "123:03:59"
var ret = "";
if (hrs > 0) {
ret += "" + hrs + ":" + (mins < 10 ? "0" : "");
}
ret += "" + mins + ":" + (secs < 10 ? "0" : "");
ret += "" + secs;
return ret;
}
}
OtpInputComponent.decorators = [
{ type: Component, args: [{
selector: 'otp',
template: "<div class=\"otp-container {{setting.wrapperClass}}\" id=\"c_{{componentKey}}\" *ngIf=\"otpForm?.controls\"\n [ngStyle]=\"setting.wrapperStyles\">\n <input \n [type]=\"setting.numbersOnly ? 'tel' : 'text'\" \n numberOnly [disabledNumberOnly]=\"!setting.numbersOnly\"\n [ngStyle]=\"setting.inputStyles\" \n maxlength=\"1\" \n class=\"otp-input {{setting.inputClass}}\" \n autocomplete=\"off\"\n *ngFor=\"let item of otpForm?.controls | keys; let i = index\" \n [formControl]=\"otpForm.controls[item]\"\n id=\"otp_{{i}}_{{componentKey}}\" \n (keyup)=\"keyUp($event, i)\"\n >\n <ng-container counter [counter]=\"setting.timer\" (value)=\"onCounterChange($event)\">\n <div>\n <button class=\"btn {{setting.btnClass}}\" [disabled]=\"counter != 0\" (click)=\"ressendOtp()\">\n Resend OTP \n <span *ngIf=\"counter != 0\">\n <ng-container *ngIf=\"!setting.timerType\">\n in {{ counter }} seconds.\n </ng-container>\n <ng-container *ngIf=\"setting.timerType\">\n in {{ formatSecsToMins(counter) }} minutes.\n </ng-container>\n </span>\n </button>\n </div>\n </ng-container>\n</div>",
styles: [".otp-input{width:2em;height:2em;border-radius:4px;border:1px solid #c5c5c5;text-align:center;font-size:28px}.otp-input:focus{outline-offset:0;outline-color:#2b91e2;outline-style:auto;outline-width:5px}.otp-container .otp-input:not(:last-child){margin-right:8px}@media screen and (max-width:767px){.otp-input{font-size:24px}}@media screen and (max-width:420px){.otp-input{font-size:18px}}"]
},] }
];
OtpInputComponent.ctorParameters = () => [
{ type: KeysPipe }
];
OtpInputComponent.propDecorators = {
setting: [{ type: Input }],
onValueChange: [{ type: Output }],
CounterDirective: [{ type: ViewChildren, args: [CounterDirective,] }]
};
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{ Component, OnInit, Input, Output, EventEmitter, ViewChildren } from '@angular/core';\nimport { FormGroup, FormControl } from '@angular/forms';\nimport { KeysPipe } from '../pipes/keys.pipe';\nimport { Setting } from '../models/setting';\nimport { CounterDirective } from '../directives/timer.directive';\n\n@Component({\n\tselector: 'otp',\n\ttemplateUrl: './angular-otp-input.component.html',\n\tstyleUrls: ['./angular-otp-input.component.scss']\n})\n\nexport class OtpInputComponent implements OnInit {\n\t@Input() setting: Setting = { \n\t\tlength: 4, \n\t\ttimer: 0,\n\t\ttimerType: 0\n\t};\n\t@Output() onValueChange = new EventEmitter<any>();\n\t@ViewChildren(CounterDirective) CounterDirective;\n\totpForm: FormGroup;\n\tinputControls: FormControl[] = new Array(this.setting.length);\n\tcomponentKey = Math.random().toString(36).substring(2) + (new Date()).getTime().toString(36);\n\tpublic counter: number;\n\t\n\tconstructor(private keysPipe: KeysPipe) {\n\t\t\n\t}\n\n\tpublic ngOnInit(): void {\n\t\tconsole.log(this.setting);\n\t\tthis.otpForm = new FormGroup({})\n\t\tfor (let index = 0; index < this.setting.length; index++) {\n\t\t\tthis.otpForm.addControl(this.getControlName(index), new FormControl())\n\t\t}\n\t}\n\t\n\tpublic ngAfterViewInit(): void {\n\t\tlet containerItem = document.getElementById(`c_${this.componentKey}`);\n\t\tif (containerItem) {\n\t\t\tlet ele: any = containerItem.getElementsByClassName('.otp-input')[0]\n\t\t\tif (ele && ele.focus) {\n\t\t\t\tele.focus();\n\t\t\t}\n\t\t}\n\t}\n\n\tprivate getControlName(idx) {\n\t\treturn `ctrl_${idx}`;\n\t}\n\n\tisLeftArrow(e) {\n\t\treturn this.isKeyCode(e, 37);\n\t}\n\n\tisRightArrow(e) {\n\t\treturn this.isKeyCode(e, 39);\n\t}\n\n\tisBackspaceOrDelete(e) {\n\t\treturn e.key === \"Backspace\" || e.key === \"Delete\" || this.isKeyCode(e, 8) || this.isKeyCode(e, 46);\n\t}\n\n\tisKeyCode(e, targetCode) {\n\t\tvar key = e.keyCode || e.charCode;\n\t\tif(key == targetCode) { return true; }\n\t\treturn false;\n\t}\n\n\tkeyUp(e, inputIdx: number) {\n\t\tlet nextInputId = this.appendKey(`otp_${inputIdx + 1}`);\n\t\tlet prevInputId = this.appendKey(`otp_${inputIdx - 1}`);\n\t\tif (this.isRightArrow(e)) {\n\t\t\tthis.setSelected(nextInputId);\n\t\t\treturn;\n\t\t}\n\t\tif (this.isLeftArrow(e)) {\n\t\t\tthis.setSelected(prevInputId);\n\t\t\treturn;\n\t\t}\n\t\tlet isBackspace = this.isBackspaceOrDelete(e);\n\t\tif (isBackspace && !e.target.value) {\n\t\t\tthis.setSelected(prevInputId);\n\t\t\tthis.rebuildValue();\n\t\t\treturn;\n\t\t}\n\t\tif (!e.target.value) {\n\t\t\treturn;\n\t\t}\n\t\tif (this.isValidEntry(e)) {\n\t\t\tthis.focusTo(nextInputId);\n\t\t}\n\t\tthis.rebuildValue();\n\t}\n\n\tappendKey(id) {\n\t\treturn `${id}_${this.componentKey}`;\n\t}\n\n\tsetSelected(eleId) {\n\t\tthis.focusTo(eleId);\n\t\tlet ele: any = document.getElementById(eleId);\n\t\tif (ele && ele.setSelectionRange) {\n\t\t\tsetTimeout(() => {\n\t\t\t\tele.setSelectionRange(0, 1);\n\t\t\t}, 0);\n\t\t}\n\t}\n\n\tisValidEntry(e) {\n\t\tvar inp = String.fromCharCode(e.keyCode);\n\t\tvar isMobile = /iPhone|iPad|iPod|Android/i.test(navigator.userAgent);\n\t\treturn isMobile || /[a-zA-Z0-9-_]/.test(inp) || (this.setting.allowKeyCodes && this.setting.allowKeyCodes.includes(e.keyCode)) || (e.keyCode >= 96 && e.keyCode <= 105);\n\t}\n\n\tfocusTo(eleId) {\n\t\tlet ele: any = document.getElementById(eleId);\n\t\tif (ele) {\n\t\t\tele.focus();\n\t\t\tele.selectionStart = ele.selectionEnd = 100;\n\t\t}\n\t}\n\n\trebuildValue() {\n\t\tlet val = '';\n\t\tthis.keysPipe.transform(this.otpForm.controls).forEach(k => {\n\t\t\tif (this.otpForm.controls[k].value) {\n\t\t\t\tval += this.otpForm.controls[k].value;\n\t\t\t}\n\t\t});\n\t\tthis.onValueChange.emit(val);\n\t}\n\n\tpublic onCounterChange(e): void {\n\t\tthis.counter = e;\n\t\tif(this.counter == 0) {\n\t\t\tthis.onValueChange.emit(-1);\n\t\t}\n\t}\n\n\tressendOtp(): void {\n\t\tthis.CounterDirective.first.startTimer();\n\t\tthis.onValueChange.emit(-2);\n\t}\n\n\tpublic formatSecsToMins(time) {   \n\t\t// Hours, minutes and seconds\n\t\tvar hrs = ~~(time / 3600);\n\t\tvar mins = ~~((time % 3600) / 60);\n\t\tvar secs = ~~time % 60;\n\t\n\t\t// Output like \"1:01\" or \"4:03:59\" or \"123:03:59\"\n\t\tvar ret = \"\";\n\t\tif (hrs > 0) {\n\t\t\tret += \"\" + hrs + \":\" + (mins < 10 ? \"0\" : \"\");\n\t\t}\n\t\tret += \"\" + mins + \":\" + (secs < 10 ? \"0\" : \"\");\n\t\tret += \"\" + secs;\n\t\treturn ret;\n\t}\n}"]}