The Date object will do what you want – construct one for each date, then compare them using the >, <, <= or >=. The ==, !=, ===, and !== operators require you to use date.getTime() as in to be clear just checking for equality directly with the date objects won’t work I suggest you use drop-downs or some similar constrained form of date entry rather than text boxes, … Read more
You need to check for status 0 (as when loading files locally with XMLHttpRequest, you don’t get a status returned because it’s not from a Webserver) And specify file:// in your filename:
Try this in the console: Here is what you will get: In other words, your app is attempting to parse undefined, which is not valid JSON. There are two common causes for this. The first is that you may be referencing a non-existent property (or even a non-existent variable if not in strict mode). The second … Read more
We use Chrome a lot in the classroom and it is a must to working with local files. What we have been using is “Web Server for Chrome”. You start it up, choose the folder wishing to work with and go to URL (like 127.0.0.1:port you chose) It is a simple server and cannot use … Read more
Assuming you have a button with the id button, try this example: I got the code from the article Smoothly scroll to an element without a jQuery plugin. And I have tested it on the example below.
I think you’re missing your routes, you need to define at least one route for example ‘/’ to index. e.g.
The 500 code would normally indicate an error on the server, not anything with your code. Some thoughts Talk to the server developer for more info. You can’t get more info directly. Verify your arguments into the call (values). Look for anything you might think could cause a problem for the server process. The process … Read more
If you don’t want to mess with HTML elements: Show code snippet This uses the HTMLAudioElement interface, which plays audio the same way as the <audio> element. If you need more functionality, I used the howler.js library and found it simple and useful. Show code snippet
Current JavaScript From ES6 on you could use template strings: See Kim’s answer below for details. Older answer Try sprintf() for JavaScript. If you really want to do a simple format method on your own, don’t do the replacements successively but do them simultaneously. Because most of the other proposals that are mentioned fail when a replace string … Read more
Javascript has a reverse() method that you can call in an array Not sure if that’s what you mean by ‘libraries you can’t use’, I’m guessing something to do with practice. If that’s the case, you can implement your own version of .reverse() Do note that the built-in .reverse() method operates on the original array, thus you don’t need to … Read more