Nigeria-Phone-Number-Validator [without Regex]

This script should serve the purpose of validating Nigerian mobile numbers (070xxxxxxxx, 234xxxxxxxxxx, +234xxxxxxxxxx)from the four major telecommunications companies - MTN, GLO, AIRTEL AND ETISALAT.

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HOW TO USE

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1. Add main.js in the js folder to your document
2. Add the id "phone" to the phone field
3. Add the error div to your document
4. Voila! that's all