简单的string.replace可以解决问题:

var str = "Test One";
str = str.replace(/ /g, '');

现在，关于您的问题，这里变得有些混乱.如果要替换 value属性，则:

Now with regards to your question, this is where it gets a little confusing. If you want to replace the value attribute, then:

$('option').val(function (i, value) {
    return value.replace(/ /g, '');
});

如果要在标签之间替换文本，则:

If you want to replace the text between the tags, then:

$('option').text(function (i, text) {
    return text.replace(/ /g, '');
});