Customizing textarea colors in HTML

I'm attempting to change the color of my HTML textarea element using CSS and/or JavaScript, so that it displays different colors as I type.

For instance, if I were to input "Hello world," I would like it to appear in green since it is a string. However, I am struggling to achieve this effect. (Please note: this is for typing on a page, not in the page's source code)
I am aware that this can be done because it has been implemented by W3Schools.

Nevertheless, I cannot seem to discover how to apply the color changes. Here is an illustrative page from W3Schools. As you type, the text changes color based on its content. However, I am unsure about implementing this feature myself. Any assistance would be greatly appreciated!

htmlcsscolors

Answer №1

Consider utilizing a tool such as to save time instead of building it from scratch.

Below is an illustration of how to highlight "found words":

$(function() {
  var $input = $("input[name='keyword']"),
    $context = $("table tbody tr");
  $input.on("input", function() {
    var term = $(this).val();
    $context.show().unmark();
    if (term) {
      $context.mark(term, {
        done: function() {
          $context.not(":has(mark)").hide();
        }
      });
    }
  });
});

For more information, visit: https://jsfiddle.net/julmot/bs69vcqL/

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