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Asked: 2026-05-24T08:01:17+00:00

I would like to know what would be the correct way to generate an

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I would like to know what would be the correct way to generate an unique identifier string from an object say, a div for example. It should be

  1. Unique – well, something like pre 1.4 jQuery.data(element) but that uses cache, right?
  2. Stable – Remains the same as such after refresh and so, thus not based on Date/Time or cache.
  3. Generate from the contents of the element, For example, duplicating that element should basically give the same identifier.
  4. A string.

Regular basic ways to generate a default id, like increments, arrays is not sufficient here. Please share your wisdom.

Thanks in advance.

EDIT: Not for the element attribute ID please.

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1 Answer

  1. Editorial Team

    You could get the element contents (including the element itself) has a string, then implement something like String.hashCode() method as implemented in the java jdk.

    The hash code for a String object is computed as

     s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]

    using int arithmetic, where s[i] is the ith character of the string, n is the length of the string, and ^ indicates exponentiation. (The hash value of the empty string is zero.)

    Depending on your implementation/task/use of that, it may be preferable to implement this function on the server side though

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