How to fix these 2 errors in html javascript

Hope that helps It sounds like you already have the ability to execute JS working, and just need to capture error output? If so, you should be able to do so by wrapping your execution code in a try ... catch block:

var result;

try {
    result = eval($("#console-input").val());
} catch (ex) {
    if (ex !== null && typeof ex !== "undefined") {
        if (ex.message) ex = ex.message;
    } else {
        ex = "An unknown error occurred.";
    }

    result = ex;
}

$("#console-output").append($("<p/>").text(result));
$("#console-input").val("");

this will help Really just expanding on MicronXD's answer. The character immediately following the

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