How to replace certain text/string in selected area using javascript

I have written a text editor using JavaScript.

Here I am not storing the written text in any variable, Now I want to replace some text/string of some selected text with other text/string.

Can anyone suggest me, how to do it using JavaScript.

T开发者_如何学Pythonhanks

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If im understanding you correctly the following script could help you:

var selectedText = document.selection;
if (selectedText.type == 'Text') {
    var newRange = selectedText.createRange();
    var replacedText = newRange.text.replace("replacingText", "textToreplace);
}

Then the variable replacedText is the replaced version of your selected text.