Question

我正在尝试使用enterkey在textarea中提交文本。工作正常，但在提交数据之前，enterkey总是添加一个新行......

我知道我必须使用event.preventDefault（）但它对我不起作用。

ko.bindingHandlers.enterKey = {
    init: function (element, valueAccessor, allBindingsAccessor, data) {
        var wrappedHandler, newValueAccessor;

        // wrap the handler with a check for the enter key
        wrappedHandler = function (data, event) {
            if (event.keyCode === ENTER_KEY && !event.shiftKey) {                   
                event.target.blur();
                valueAccessor().call(this, data, event);
            }
        };

        // create a valueAccessor with the options that we would want to pass to the event binding
        newValueAccessor = function () {
            return {
                keyup: wrappedHandler
            };
        };

        // call the real event binding's init function
        ko.bindingHandlers.event.init(element, newValueAccessor, allBindingsAccessor, data);
    }
};

Answer 1

您应该在event.preventDefault事件上致电keypress 例如，下面的代码会阻止按键输入

ko.bindingHandlers.enterKey = {
    init: function (element, valueAccessor, allBindingsAccessor, data) {
        $(element).keypress(function(e) { 
            (e.keyCode == 13) {
               e.preventDefault();
               // do something else
            }
        })
    }
}

javascript阻止enterKey添加新行

1 个答案: