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Arithmetic Captcha Component For Ionic 3

This is an Ionic Angular component that ask arithmetic equation to user and check its result.

For Download

npm install ionic-captcha

Usage

Add CaptchaProvider to your AppModule and add imports from used module CaptchaComponentModule. Then add <captcha></captcha> to your html file. To use within FormControl add required validator and add form control name formControlName="captcha"

At least usage shown like below. In Html Template <captcha formControlName="captcha"></captcha> In Controller

this.formBuilder.group({
	captcha: ['', Validators.required]
});

Customization

User has 3 chance to find true solution otherwise regenerate captcha with new solution. In this 3 chance keyPress timeout is default 1500ms because of mobile platform but this is parametric. Developer change this timeout with keypressTimeout parameter.

Also there are four other parameters you can use and default values are given below.

Parameter Description Default Value
useMinus Use only plus operant or both true
negativeAllowed Result can be negative number true
minNumLength Minimum number of digits of numbers 1
maxNumLength Maximum number of digits of numbers 2