Last change
on this file since 6a3a178 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | 'use strict';
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2 | /**
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3 | * `input` type prompt
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4 | */
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5 |
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6 | const Input = require('./input');
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7 |
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8 | /**
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9 | * Extention of the Input prompt specifically for use with number inputs.
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10 | */
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11 |
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12 | class NumberPrompt extends Input {
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13 | filterInput(input) {
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14 | if (input && typeof input === 'string') {
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15 | input = input.trim();
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16 | // Match a number in the input
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17 | const numberMatch = input.match(/(^-?\d+|^\d+\.\d*|^\d*\.\d+)(e\d+)?$/);
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18 | // If a number is found, return that input.
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19 | if (numberMatch) {
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20 | return Number(numberMatch[0]);
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21 | }
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22 | }
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23 |
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24 | // If the input was invalid return the default value.
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25 | return this.opt.default == null ? NaN : this.opt.default;
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26 | }
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27 | }
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28 |
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29 | module.exports = NumberPrompt;
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