dom-events

问题 Am new to programming in Python and Javascript and I have been learning Python for few months now and love it. I have been playing with django which is cool I was wondering how I can make this model work with a Iavascript. I'll like someone to explain as much as the code involved as I just what to have a full understanding of the process from django to Javascript. I want to dynamically is CarModel.objects.filter(make ='somename') or just 'somename'. This is a test model am using since its

问题 As I understand, when this following line of code is interpreted/executed by Javascript ref.on('value',callback) (similar to document.addEventListener('click', callback) ). The callback gets attached to the el/object for that event such that when that event executes then the attached callback (event handler) gets fired. But I observe that firebase 'value' event will automatically fire when there is some data at this ref , when the above line of code is interpreted/executed by Javascript even

问题 As I understand, when this following line of code is interpreted/executed by Javascript ref.on('value',callback) (similar to document.addEventListener('click', callback) ). The callback gets attached to the el/object for that event such that when that event executes then the attached callback (event handler) gets fired. But I observe that firebase 'value' event will automatically fire when there is some data at this ref , when the above line of code is interpreted/executed by Javascript even

问题 I am working on a basic notepad app, for now the functionality is simple, create a note, when done click on the note from a list of previous created notes to view its details. I am not able to click on the note and see the details, instead I see the details of the component ShowNote.vue on the bottom of the notepad template, and in order to see the details I have to make the v-if="noteIsOpen to false". I am also not able to see the data from the data bind in ShowNote.vue file. Also when you

问题 By accident, I just pressed the play/pause ( ▶/❚❚ ) button on my keyboard (the button just above Num Lock on , while playing a YouTube video in a tab that was not focused. To my massive surprise, the YouTube video paused immediately. Now, I tried looking up how this works, but I was not able to find anything on the internet explaining how a keypress can be detected for keys like this. I tried running onkeydown = function(e) {console.log(e)} in my console, but pressing the play/pause button

问题 By accident, I just pressed the play/pause ( ▶/❚❚ ) button on my keyboard (the button just above Num Lock on , while playing a YouTube video in a tab that was not focused. To my massive surprise, the YouTube video paused immediately. Now, I tried looking up how this works, but I was not able to find anything on the internet explaining how a keypress can be detected for keys like this. I tried running onkeydown = function(e) {console.log(e)} in my console, but pressing the play/pause button

问题 I am developing an application where I need to do some post-processing when the user presses CMD + LEFT on a particular text-box. I need to do this after the browser's default functionality (i.e. after it takes the caret to first position in current physical line). The problem is keyup is not being triggered for the LEFT key (or any key for that matter) as long as the CMD key is down. I tried this with CTRL and SHIFT keys and found that keyup gets triggered as expected for the secondary key.

问题 I am developing an application where I need to do some post-processing when the user presses CMD + LEFT on a particular text-box. I need to do this after the browser's default functionality (i.e. after it takes the caret to first position in current physical line). The problem is keyup is not being triggered for the LEFT key (or any key for that matter) as long as the CMD key is down. I tried this with CTRL and SHIFT keys and found that keyup gets triggered as expected for the secondary key.

问题 When using Javascript promises, does the event loop get blocked? My understanding is that using await & async, makes the stack stop until the operation has completed. Does it do this by blocking the stack or does it act similar to a callback and pass of the process to an API of sorts? 回答1: When using Javascript promises, does the event loop get blocked? No. Promises are only an event notification system. They aren't an operation themselves. They simply respond to being resolved or rejected by

来源： https://stackoverflow.com/questions/5125926/javascript-event-currenttarget-vs-this