Update inline TeX documentation #1199
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| if (isDigit(text.charAt(i - 1)) || isDigit(text.charAt(i + 1))) { | ||
| result += text.charAt(i); | ||
| i++; | ||
| continue; |
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The inline parser short-circuits whenever a $ is immediately next to a digit (lines 51-54), so expressions like $2x$ are treated as literal text and never sent through KaTeX. This defeats the new single-dollar inline support for any formula that begins with a numeric coefficient—a common pattern in math—and require("./katex")("Example $2x$ inline.") currently returns the unrendered string.
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| if (isDigit(text.charAt(index - 1)) || isDigit(text.charAt(index + delimiter.length))) { | ||
| index += delimiter.length; | ||
| continue; |
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The closing delimiter search skips any $ with a digit immediately before or after it (lines 86-88). As a result, inline expressions that end with numbers—such as $a^2$, $x_1$, or $b^2 + c^2$ from the new example—never find a closing delimiter and are left unrendered. Inline math containing numeric exponents or indices is therefore broken unless a non-digit trails the final $.
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Testing
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