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http://help.dottoro.com/ljtfkhio.php
The selectionStart property is supported in Internet Explorer from version 9. In older Internet Explorer versions, use the createRange method of the selection object to retrieve the selection within the document and use the createTextRange method to select a part of the text content within an element. See the example below for details.
https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/setSelectionRange
Chrome, starting from version 33, throws an exception while accessing those properties and method on the rest of input types. For example, on input of type number: "Failed to read the 'selectionStart' property from 'HTMLInputElement': The input element's type ('number') does not support selection".
https://stackoverflow.com/questions/21177489/selectionstart-selectionend-on-input-type-number-no-longer-allowed-in-chrome
Our application uses selectionStart on input fields to determine whether to automatically move the user to the next/previous field when they press the arrow keys (ie, when the selection is at the end of the text and the user presses the right arrow we move to the next field, otherwise)
https://javascript.info/selection-range
JavaScript can get the existing selection, select/deselect both as a whole or partially, remove the selected part from the document, wrap it into a tag, and so on. ... Other browsers support at maximum 1 range. As we’ll see, ... we can read selectionStart/End and, with the knowledge of the selection, change the corresponding substring of ...
http://help.dottoro.com/ljxjdqwh.php
Specifies or returns the end position of the selected text within the current element. To retrieve the start position, use the selectionStart property. When the values of the selectionStart and selectionEnd properties are the same, no text is selected.
https://bugzilla.mozilla.org/show_bug.cgi?id=88049
input.selectionStart n' friends are mozilla extensions to the DOM, we don't support that on textareas, bug 58850 is not direcly related to this, so if you want a RFE on file for supporting .selectionStart n' friends for textareas, reopen this bug.
https://ourcodeworld.com/articles/read/282/how-to-get-the-current-cursor-position-and-selection-within-a-text-input-or-textarea-in-javascript
In order to provide support for old browsers, use the following method. The method is asynchronous, it expects as first parameter a DOM element (wheter textarea or text input) and it will return an object with 2 properties (start and end equivalent to the values of selectionStart and selectionEnd).
https://www.devexpress.com/Support/Center/Question/Details/Q130808/selectedtext-selectionlength-selectionstart
Oct 01, 2008 · Marina, many thanks for the answer. I have reviewed the mentioned sample, but it seems that the information (SelectedText, SelectionLength and SelectionStart) is only available on the “ShownEditor” event which does not help, since at that time the text has not been selected yet.
https://www.devexpress.com/Support/Center/Question/Details/Q427181/textedit-ignoring-selectionstart-length
My program is generating a default string for a textbox and selects a part of it which is likely to be modified by the user. After the Text of a TextEdit is changed (programatically), the next time it gets the focus it will automatically select all the text in the editor, despite of what SelectionStart and SelectionLength have been set to.
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