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Element properties just for Javascript reference?


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What if you wanted to assign a property to an input just to identify some sort of desired reference for Javascript? What would the best practice be in that situation? Is there an appropriate do-nothing property for that purpose? For example a particular radio button is associated with the visibility of particular fields in a different part of the page. When Javascript scans the radio button it can also read the cross-reference property to get the class of the text fields that are to be toggled.


I could use class, but that might create confusion since it would not be intended for styling.


I could use undefined/custom attributes but that might also cause confusion. I believe browsers are supposed to ignore any attribute they don't understand, but is that considered bad practice?


Input properties:




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