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devexamples

Whitespace Normalizer for User Input

Trim, collapse and optionally preserve line breaks while removing zero-width characters that break search and comparison.

JavascriptData Integrity

Code

snippet
export function normalizeWhitespace(text, options = {}) {
  if (typeof text !== "string") throw new TypeError("text must be a string");
  const preserveNewlines = options.preserveNewlines === true;
  const withoutInvisible = text.replace(/[\u200B-\u200D\uFEFF]/g, "");
  if (preserveNewlines) {
    return withoutInvisible
      .split(/\r\n|\r|\n/)
      .map((line) => line.replace(/[ \t\f\v]+/g, " ").trim())
      .join("\n")
      .trim();
  }
  return withoutInvisible.replace(/\s+/g, " ").trim();
}

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