keypress

问题 Trying to do some jQuery validation (without the plugin - please no answers like "Just use the validate-js plugin"). I'm wiring up a client-side event handler keypress for each "required field" on doc ready: $(document).ready(function() { $('#myform input.required').each(function() { $(this).keypress(onRequiredFieldKeyPress); }); }); Which correctly fires this event on each keypress: function onRequiredFieldKeyPress() { if ($(this).val().trim() == '') { $(this).next('em').html('*').show(); //

问题 I found many results for this on this website but they all seem to use Jquery. I really need to know how to do it without Jquery. What I want is to click a button and have the keystroke for example ALT+N or CTRL+G triggered. Thanks. 回答1: Take a look at the KeyboardEvent constructor. You could use it like this: document.addEventListener('DOMContentLoaded', function () { document.getElementById('alt-n').addEventListener('click', function () { // create a new keyboard event var event = new

问题 When I click a Button, a form of an unspecific number of input fields will be generated in my dom plus an empty input Field. I want to add something like a keypress event to the last generated empty input field. When I start typing, into the last empty input field, another input field should append. This new appended input field should get the keypress eventlistener and the input field I am in should loose the keypress eventlistener. Here's how I did it( EDIT: added as code snippet): $

问题 When I click a Button, a form of an unspecific number of input fields will be generated in my dom plus an empty input Field. I want to add something like a keypress event to the last generated empty input field. When I start typing, into the last empty input field, another input field should append. This new appended input field should get the keypress eventlistener and the input field I am in should loose the keypress eventlistener. Here's how I did it( EDIT: added as code snippet): $

问题 When I click a Button, a form of an unspecific number of input fields will be generated in my dom plus an empty input Field. I want to add something like a keypress event to the last generated empty input field. When I start typing, into the last empty input field, another input field should append. This new appended input field should get the keypress eventlistener and the input field I am in should loose the keypress eventlistener. Here's how I did it( EDIT: added as code snippet): $

问题 I have a simple GTK program containing a single webkit2 widget in a window and nothing else. I want to be able to filter the keypresses going to the webkit2 widget. At first I added a key mask to the webkit widget and added a callback function, however after propogating the event in the callback function it just calls itself recursively which results in a crash. To resolve this I attached my key mask to the main-window, which is parent to my webkit widget, however this no longer prevents

问题 I'm running into an issue with a small Chrome extension that I'm writing. Basically the issue is that I need to simulate a keydown event in an input field so that the targeted site will pick it up with its listener. To find the listeners I set an Event Listener Breakpoint for all Keyboard events then typed into the input field. There were 3 breakpoints that I had to step through, all for Keyboard->keydown events. Here's the basic info for them: Arguments: Arguments[1] E: KeyboardEvent This:

问题 I'm running into an issue with a small Chrome extension that I'm writing. Basically the issue is that I need to simulate a keydown event in an input field so that the targeted site will pick it up with its listener. To find the listeners I set an Event Listener Breakpoint for all Keyboard events then typed into the input field. There were 3 breakpoints that I had to step through, all for Keyboard->keydown events. Here's the basic info for them: Arguments: Arguments[1] E: KeyboardEvent This:

问题 I'm running into an issue with a small Chrome extension that I'm writing. Basically the issue is that I need to simulate a keydown event in an input field so that the targeted site will pick it up with its listener. To find the listeners I set an Event Listener Breakpoint for all Keyboard events then typed into the input field. There were 3 breakpoints that I had to step through, all for Keyboard->keydown events. Here's the basic info for them: Arguments: Arguments[1] E: KeyboardEvent This:

问题 Trying to make pong in java but can't move both paddles at once. You can move one or the other but not both at the same time. Do I need to create 2 threads with 2 different pannels? Here is where I am specifying the key events public void keyPressed(KeyEvent e) { if(e.getKeyCode() == KeyEvent.VK_A || e.getKeyCode() == KeyEvent.VK_S || e.getKeyCode() == KeyEvent.VK_QUOTE || e.getKeyCode() == KeyEvent.VK_SEMICOLON){ if(e.getKeyCode() == KeyEvent.VK_A){ y-=10; } if(e.getKeyCode() == KeyEvent.VK