JS如何判断连续输入完？js判断输入结束可以通过下面这个jquery插件完美实现。

引用js文件（代码见文末）

使用方法：

$('#{你的input输入框的id}').donetyping(function () {
	//输入完成后执行的JS代码	
});

donetyping.js代码：

//
// $('#element').donetyping(callback[, timeout=1000])
// Fires callback when a user has finished typing. This is determined by the time elapsed
// since the last keystroke and timeout parameter or the blur event--whichever comes first.
//   @callback: function to be called when even triggers
//   @timeout:  (default=1000) timeout, in ms, to to wait before triggering event if not
//              caused by blur.
// Requires jQuery 1.7+
//
; (function ($) {
    $.fn.extend({
        donetyping: function (callback, timeout) {
            timeout = timeout || 1e3; // 1 second default timeout
            var timeoutReference,
                doneTyping = function (el) {
                    if (!timeoutReference) return;
                    timeoutReference = null;
                    callback.call(el);
                };
            return this.each(function (i, el) {
                var $el = $(el);
                // Chrome Fix (Use keyup over keypress to detect backspace)
                // thank you @palerdot
                $el.is(':input') && $el.on('keyup keypress paste', function (e) {
                    // This catches the backspace button in chrome, but also prevents
                    // the event from triggering too preemptively. Without this line,
                    // using tab/shift+tab will make the focused element fire the callback.
                    if (e.type == 'keyup' && e.keyCode != 8) return;

                    // Check if timeout has been set. If it has, "reset" the clock and
                    // start over again.
                    if (timeoutReference) clearTimeout(timeoutReference);
                    timeoutReference = setTimeout(function () {
                        // if we made it here, our timeout has elapsed. Fire the
                        // callback
                        doneTyping(el);
                    }, timeout);
                }).on('blur', function () {
                    // If we can, fire the event since we're leaving the field
                    doneTyping(el);
                });
            });
        }
    });
})(jQuery);