读取输入的值返回undefined

Question

我有这个输入

 <input id="look" type="number" min="0" step="0.01" max="100000" class="form-control" name="number" required>

我想读取用户当时将放置的值.所以我写了

$(function() {
    $('#look').on('keyup', function(e) {
        var temp2 = $('look').val();
        alert(temp2);

    });
});

当用户开始输入警报内的值时,未定义..

Answer 1

它应该是#look而不是look选择器使用而不是选择器$( this )

$(function() {
    $('#look').on('keyup', function(e) {
        var temp2 = $(this).val(); //look should have been #look
        alert(temp2);
    });
});