jquery - why do we need prefix "data" for custom data attributes in html5 -

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is there reason use data-attribute custom data attributes on html5 elements? remember using custom data attributes without using data prefix , think did work alright.

can please correct me.

abridged version of the answer @lachlan hunt duplicate question:

  • it guarantees there not clashes extensions html in future editions.
  • more convenient dom api accessing these attributes scripts.
  • they provide clear indication of attributes custom attributes, , ones standardised attributes.

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