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• • January 4, 2020 at 7:33 pm #1221102
    Antoine Dubuc

    Member

    Greetings from Vancouver,

    It appears ExtendScript doesn’t have full Math support.
    I’m simply trying to use Math.sign() and it errors out.

    View post on imgur.com

    Am I missing something?

    Cheers,

    Antoine

  • January 4, 2020 at 11:33 pm #14323337
    Mahesh Thambe

    Member

    Yes, Math.sign does not exist in ExtendScript.

    Math.sign and other such functions, for example String.startsWith, Array.indexOf have been added to newer versions of ECMAScript, and are available in web browsers, but not in ExtendScript.

    I tend to use polyfills for such cases.

    From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign

    if (!Math.sign) {
    Math.sign = function(x) {
    // If x is NaN, the result is NaN.
    // If x is -0, the result is -0.
    // If x is +0, the result is +0.
    // If x is negative and not -0, the result is -1.
    // If x is positive and not +0, the result is +1.
    return ((x > 0) – (x < 0)) || +x;
    };
    }

    Add this polyfill, and your code should work fine.

    Thanks,
    MT

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