fix(parse): reject numeric strings with non-numbers #2729
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This updates the number parsing utilities to reject strings like "1A", which `parseFloat` would ordinarily happily accept as the value `1`.
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| const parseNumber = (value: string): number => { | ||
| const matches = value.match(NUMBER_REGEX); | ||
| if (matches === null || matches[0].length !== value.length) { |
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Can you anchor the regex so you can just use RegExp.test and not have to check the length of the match?
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hahaha your faith in js is heartwarming, no it'll match partials anyway
| // * Exponent indicated by a case-insensitive 'E' optionally followed by a | ||
| // positive/negative sign and some number of digits. | ||
| // It also matches both positive and negative infinity as well and explicit NaN. | ||
| const NUMBER_REGEX = /(-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?)|(-?Infinity)|(NaN)/g; |
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Very nit: Is this too strict? parseFloat() handles strings leading with "0" just fine.
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It might be overkill at this point (I think the concern was stuff like this) but we can always loosen this later. It's much more difficult to tighten it.
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Issue
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Description
This updates the number parsing utilities to reject strings like "1A", which
parseFloatwould ordinarily happily accept as the value1. It also updates it to reject the wide swath of alternative number formats that JS numbers can have.Testing
Additional unit tests were added.
Additional context
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