jquery - 如何触发 keyup 事件并传递 key ？

Question

我有一个字段可以在您键入时“更正”自身。我们编写了一些代码，可以在按下箭头键时阻止此功能:

handleKeyUp: function(e) {
    var arrowKeys = _.range(37, 41),
        key = e.which;

    // allow user to move cursor by keyboard
    if ($.inArray(key, arrowKeys) < 0) {
        this.removeInvalidCharacters();
    }
},

我们想为此编写一个单元测试；但是，我们不知道如何通过 $input.trigger('keyup') 传递 e.which。我知道触发器的第二个参数允许我们发送“额外选项”；但是，这只是将更多值传递给 handleKeyUp 函数。有想法吗？

Answer 1

试试这个 -

var e = $.Event("keyup");
e.which = 37; 
$input.trigger(e);

http://api.jquery.com/category/events/event-object/

As of jQuery 1.6, you can also pass an object to jQuery.Event() and its properties will be set on the newly created Event object.

// Create a new jQuery.Event object with specified event properties.
var e = jQuery.Event("keydown", { keyCode: 64 });

// trigger an artificial keydown event with keyCode 64
jQuery("body").trigger( e );