How to change color of selected text of textarea?

问题

I have textarea and i want to change color of selected text. Example:

var text = "abcdefg";

I want to change color of selected text efg.

here is my code:

var input = document.getElementById('area');
var value = input.value.substr(input.selectionStart, input.selectionEnd - input.selectionStart);
$('#abc').find(value).attr('color',color);

回答1:

Use ::selection CSS selector that select part of text is seleced. You can add your CSS property to selected text of elements.

var textarea = document.querySelector("textarea");
textarea.selectionStart = 12;
textarea.selectionEnd = 23;

::-moz-selection { 
    color: red;
}
::selection {
    color: red;  
}

<textarea>My textarea highlighted text</textarea>

回答2:

You can't change the selection color for a textarea, you can only change it for non-input objects.

Maybe you should try contenteditable instead of textarea

来源：https://stackoverflow.com/questions/39656190/how-to-change-color-of-selected-text-of-textarea