alert if the document contains overset text warning

An alternative function (not rigorously tested).

var doc = app.activeDocument;
var textFrames = doc.textFrames;
var numTextFrames = textFrames.length;
for (var i = 0; i < numTextFrames; i++) {
    var tf = textFrames[i];
    if (tf.kind == TextType.AREATEXT &&
        tf.contents.length > 0 &&
        overflows(tf)) {
            alert("Overset text detected in text frame " + (i + 1));
    }
}

function overflows(tf) {
    var lastLine = tf.lines[tf.lines.length - 1];
    var textRange1 = lastLine.contents;
    var textRange2 = "";
    for (var i = tf.characters.length - 1;
        i > (tf.characters.length - lastLine.contents.length) - 1;
        i--) {
        textRange2 = tf.characters[i].contents + textRange2;
    }
    return textRange1 != textRange2;
}

Hi @thirukumarans77083, I've put together a function to do this, which I found in another area on this forum. See code for link. - Mark

var doc = app.activeDocument;
var textFrames = doc.textFrames;
var numTextFrames = textFrames.length;
for (var i = 0; i < numTextFrames; i++) {
    var tf = textFrames[i];
    if (textFrameIsOverset(tf)) {
        alert("Overset text detected in text frame " + (i + 1) + ' ' + tf.name);
    }
}


/**
 * Returns true if an Illustrator Area Text Frame is overset.
 * @author based on code by moluapple
 * @url https://community.adobe.com/t5/illustrator-discussions/illustrator-javascript-for-quot-identify-overset-text-in-a-text-frame-and-reduce-the-font-size-quot/td-p/9273739
 * @param {TextFrame} tf - an Illustrator text frame.
 * @returns {Boolean}
 */
function textFrameIsOverset(tf) {
    var isOverset = !tf.hasOwnProperty('kind') || tf.kind != TextType.AREATEXT;
    var dup = tf.duplicate();
    dup.name = 'temp';
    dup.convertAreaObjectToPointObject();
    dup = tf.parent.textFrames['temp'];
    isOverset = dup.contents.replace(/[\x03\r]/g, '') !== tf.contents.replace(/[\x03\r]/g, '')
    dup.remove();
    return isOverset;
};