JS- Remove White space and retain New line character,spl char not allow

Javascript - Remove White space  and retain New line character,spl char not allow
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function RemoveallSpaces() {
    var output = document.getElementById("content").value;          // textarea or text .....

    output = output.replace(/\s/g, "") // remove all spl characters

output = /[~`!#$%\^&*+=\-\[\]\\';,/{}|\\":<>\?]/g.test(output)     //retain new line chars

    document.getElementById("output").innerHTML = output;
}


Direct second point

output = output.replace(/[ \t]/g,'');                              // textarea or text .....

function isValid(str){
return !/[~`!#$%\^&*+=\-\[\]\\';,/{}|\\":<>\?]/g.test(str);    //special character not allow 

}