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