30 lines
701 B
JavaScript
30 lines
701 B
JavaScript
|
'use strict';
|
||
|
|
/**
|
||
|
|
* `input` type prompt
|
||
|
|
*/
|
||
|
|
|
||
|
|
const Input = require('./input');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Extention of the Input prompt specifically for use with number inputs.
|
||
|
|
*/
|
||
|
|
|
||
|
|
class NumberPrompt extends Input {
|
||
|
|
filterInput(input) {
|
||
|
|
if (input && typeof input === 'string') {
|
||
|
|
input = input.trim();
|
||
|
|
// Match a number in the input
|
||
|
|
const numberMatch = input.match(/(^-?\d+|^-?\d+\.\d*|^\d*\.\d+)(e\d+)?$/);
|
||
|
|
// If a number is found, return that input.
|
||
|
|
if (numberMatch) {
|
||
|
|
return Number(numberMatch[0]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// If the input was invalid return the default value.
|
||
|
|
return this.opt.default == null ? NaN : this.opt.default;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = NumberPrompt;
|