删除空格和HTML标签

Question

Trying to make sure no one put a space in the username on sign up, I got the html tags to removed but not spaces.

Javascript:

$("#user").keypress(function (evt) {
    if (isValid(String.fromCharCode(evt.which)))
        return false;
});

function isValid(str) {
    return /[~`!#$%\^&*+=\-\[\]\\';,/{}|\\":<>\?]/g.test(str);
}

function stripspaces(input) {
    input.value = input.value.replace(/\s/gi, "");
    return true;
}

HTML:

Username: <input type="text" id="user"><br/>

You can see it here. http://jsfiddle.net/QshDd/63/

Answer 1

You can try with (each space character is being replaced, character by character, with the empty string):

str = str.replace(/\s/g, '');

or (each contiguous string of space characters is being replaced with the empty string by the "+" character):

str = str.replace(/\s+/g, '');

Ciao!

Answer 2

You need to return the input value with the spaces removed:

function stripspaces(input)
{
  return input.value.replace(/\s/gi,"");
}

The way you had it written the function just returned true regardless. Also, it seems you weren't calling the function (admittedly from only a quick read).

Although, it's probably easier to simply add \\s (a regular expression special character for white-space characters) to the characters to replace, giving:

function isValid(str) {
    return /[~`!#$%\^&*+=\-\[\]\\';,/\s{}|\\":<>\?]/g.test(str);
}

JS Fiddle demo .

References:

• JavaScript regular expressions .

Answer 3

尝试这个，

input.value.replace(/\n/g," ").replace( /<.*?>/g, "" );