I want to run a script that will be checking if there is a white space and tap space with javascript. Please I need a help.

This is my code:

var textinputs = document.querySelector("#message");

textinputs.addEventListener("keyup", e => {
    if (/\s/.test(e)) {
                $(btnSubmit).css("opacity", ".5");
                $(btnSubmit).attr("disabled", "disabled");
                console.log("block")
            } else {
                console.log("send");
                $(btnSubmit).css("opacity", "");
                $(btnSubmit).removeAttr("disabled");
            }
  });

My idea is to check if there is some white space or tap space if not enable the submit button