selection-update
v0.1.2
Published
Computing selection updates on external INPUT value changes, browser style
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selection-update
Computing input selection updates on external file changes, as if we used browser managed undo and redo.
API
/**
* Calculate the selection update for the given
* current and new input values.
*
* @param {Object} currentSelection as {start, end}
* @param {String} currentValue
* @param {String} newValue
*
* @return {Object} newSelection as {start, end}
*/
calculateUpdate(currentSelection, currentValue, newValue);
Usage
var selectionUpdate = require('selection-update');
/**
* Update input with new value.
* @param {Node} $input
* @param {String} newValue
*/
function updateInput($input, newValue) {
var newSelection;
// only retrieve and restore input, if the element
// is currently active
if (document.activeElement === $input) {
// get the current selection and pass it in as {start, end}
newSelection = selectionUpdate(getSelection($input), $input.value, newValue);
}
// apply new value, will naturally send selection to input end
$input.value = value;
if (newSelection) {
// set new {start, end} selection on input
setSelection($input, selection);
}
}
License
MIT