react-phone-number-input
Version:
Telephone number input React component
32 lines • 791 B
JavaScript
// Tells if `value: string` is an `E.164` phone number.
//
// Returns a boolean.
//
// It doesn't validate that the minimum national (significant) number length
// is at least 2 characters.
//
export default function isE164Number(value) {
if (value.length < 2) {
return false;
}
if (value[0] !== '+') {
return false;
}
var i = 1;
while (i < value.length) {
var character = value.charCodeAt(i);
if (character >= 48 && character <= 57) {
// Is a digit.
} else {
return false;
}
i++;
}
return true;
}
export function validateE164Number(value) {
if (!isE164Number(value)) {
console.error('[react-phone-number-input] Expected the initial `value` to be a E.164 phone number. Got', value);
}
}
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