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https://github.com/DayuanJiang/next-ai-draw-io.git
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22 lines
749 B
TypeScript
22 lines
749 B
TypeScript
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/**
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* Strict XML syntax check, used in Node and in the web app's browser code.
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* saxes reports syntax errors the way draw.io's DOMParser will, including
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* an attribute prefix such as xlink: that was never declared.
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*/
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import { SaxesParser } from "saxes"
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/**
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* Returns the first XML syntax error as "line:column: message", or null if
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* the XML is well-formed. Surrounding whitespace is ignored because every
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* caller trims before the XML reaches the browser.
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*/
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export function getXmlSyntaxError(xml: string): string | null {
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let error: string | null = null
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const parser = new SaxesParser({ xmlns: true })
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parser.on("error", (err) => {
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error ??= err.message
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})
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parser.write(xml.trim()).close()
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return error
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}
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