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// Edits text `value` (if `operation` is passed) and repositions the `caret` if needed.
//
// Example:
//
// value - '88005553535'
// caret - 2 // starting from 0; is positioned before the first zero
// operation - 'Backspace'
//
// Returns
// {
// value: '8005553535'
// caret: 1
// }
//
// Currently supports just 'Delete' and 'Backspace' operations
//
export default function edit(value, caret, operation)
{
switch (operation)
{
case 'Backspace':
// If there exists the previous character,
// then erase it and reposition the caret.
if (caret > 0)
{
// Remove the previous character
value = value.slice(0, caret - 1) + value.slice(caret)
// Position the caret where the previous (erased) character was
caret--
}
break
case 'Delete':
// Remove current digit (if any)
value = value.slice(0, caret) + value.slice(caret + 1)
break
}
return { value, caret }
}
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