How to find some characters with grep and then apply object style to that textbox?

Hi @dublove, you already have a good answer from Anantha, but here is an extra way to do it, using Indesigns findGrep. I have made an array of "queries" so you can specify the object styles to apply to different find strings.

- Mark

/**
 * Find Grep And Apply Object Style.js
 * @author m1b
 * @version 2025-01-08
 * @discussion https://community.adobe.com/t5/indesign-discussions/how-to-find-some-characters-with-grep-and-then-apply-object-style-to-that-textbox/m-p/15076832
 */
function main() {

    var queries = [
        { findWhat: '\\d{3}-001@', objectStyleName: 'My Style 1' },
        { findWhat: '\\d{3}-002@', objectStyleName: 'My Style 2' },
    ];

    var doc = app.activeDocument;

    for (var q = 0; q < queries.length; q++) {

        app.findGrepPreferences = NothingEnum.NOTHING;
        app.findGrepPreferences.findWhat = queries[q].findWhat;

        // find the dayNumbers
        var found = doc.findGrep(),
            style = doc.objectStyles.itemByName(queries[q].objectStyleName);

        if (!style.isValid) {
            alert('Bad object style: "' + queries[q].objectStyleName + '"');
            continue;
        }

        for (var i = 0; i < found.length; i++) {
            if (undefined != found[i].parentTextFrames[0])
                // apply object style
                found[i].parentTextFrames[0].appliedObjectStyle = doc.objectStyles.itemByName(queries[q].objectStyleName);
        }

    }

}
app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, 'Set Object Styles');