parallax/jsPDF · error · Error

Invalid argument passed to jsPDF.getPageInfoByObjId

Error message

Invalid argument passed to jsPDF.getPageInfoByObjId

What it means

Thrown by jsPDF.getPageInfoByObjId when objId is NaN or not an integer. The guard `isNaN(objId) || objId % 1 !== 0` rejects non-numbers, fractional values, undefined, and strings that coerce to NaN. objId must be a valid PDF object id previously returned by getPageInfo().

Source

Thrown at src/jspdf.js:3330

  var getPageInfo = (API.__private__.getPageInfo = API.getPageInfo = function(
    pageNumberOneBased
  ) {
    if (isNaN(pageNumberOneBased) || pageNumberOneBased % 1 !== 0) {
      throw new Error("Invalid argument passed to jsPDF.getPageInfo");
    }
    var objId = pagesContext[pageNumberOneBased].objId;
    return {
      objId: objId,
      pageNumber: pageNumberOneBased,
      pageContext: pagesContext[pageNumberOneBased]
    };
  });

  var getPageInfoByObjId = (API.__private__.getPageInfoByObjId = function(
    objId
  ) {
    if (isNaN(objId) || objId % 1 !== 0) {
      throw new Error("Invalid argument passed to jsPDF.getPageInfoByObjId");
    }
    for (var pageNumber in pagesContext) {
      if (pagesContext[pageNumber].objId === objId) {
        break;
      }
    }
    return getPageInfo(pageNumber);
  });

  var getCurrentPageInfo = (API.__private__.getCurrentPageInfo = API.getCurrentPageInfo = function() {
    return {
      objId: pagesContext[currentPage].objId,
      pageNumber: currentPage,
      pageContext: pagesContext[currentPage]
    };
  });

  /**

View on GitHub (pinned to a3930ce03a)

Solutions

1. Pass the numeric objId returned by getPageInfo().objId.
2. Validate with Number.isInteger before calling.
3. If you only have a page number, use getPageInfo(pageNumber) directly instead.

Example fix

// before
const info = doc.getPageInfoByObjId('5'); // string -> NaN
// after
const info = doc.getPageInfoByObjId(5); // numeric object id

function safeGetPageInfoByObjId(doc, objId) {
  const id = Number(objId);
  if (!Number.isInteger(id)) throw new Error('objId must be an integer');
  return doc.getPageInfoByObjId(id);
}

function isIntegerId(v) { return Number.isInteger(v); }

When it happens

Trigger: Calling getPageInfoByObjId(undefined), with a fractional id, a string id like 'obj5', or an id that was never assigned. The function then iterates pagesContext looking for a matching objId.

Common situations: Passing an objId retrieved from the wrong structure; off-by issues where the caller assumes a string id; passing a page number instead of an object id.

Related errors

• Invalid argument passed to jsPDF.getPageInfo
• Invalid arguments passed to jsPDF.text
• Type of text must be string or Array. "{text}" is not recogn
• Unrecognized alignment option, use "left", "center", "right"
• Invalid arguments passed to jsPDF.line

AI-assisted analysis of parallax/jsPDF@a3930ce03a (2026-08-13). Data as JSON: /api/errors/c63b21758605da6c. Report an issue: GitHub.