disable form with javascript code example

Example 1: jquery disable input

//jQuery 1.6+ use:
$("#inputID").prop('disabled', true); //disable 
$("#inputID").prop('disabled', false); //enable

//jQuery 1.5 and below use:
$("#inputID").attr('disabled','disabled'); //disable 
$("#inputID").removeAttr('disabled'); //enable

Example 2: input uppercase with css

<input oninput="let p = this.selectionStart; this.value = this.value.toUpperCase();this.setSelectionRange(p, p);" />

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