The readonly attribute is a boolean attribute.
When present, it specifies that an input field is read-only.
A readonly input field cannot be modified (however, a user can tab to it, highlight it, and copy the text from it).
When present, it specifies that an input field is read-only.
A readonly input field cannot be modified (however, a user can tab to it, highlight it, and copy the text from it).
Example :
Output : 
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