Tallest Unicode character?
Whats the unicode Character code of that f symbol? (Image by WHATWG). I suppose it’s the tallest Unicode character there is. Is it?
javascript
“document.getElementByClass is not a function”
You probably meant document.getElementsByClassName() (and then grabbing the first item off the resulting node list): You may still get the error document.getElementsByClassName is not a function in older browsers, though, in which case you can provide a fallback implementation if you need to support those older browsers.
Download File Using JavaScript/jQuery
Use an invisible <iframe>: To force the browser to download a file it would otherwise be capable of rendering (such as HTML or text files), you need the server to set the file’s MIME Type to a nonsensical value, such as application/x-please-download-me or alternatively application/octet-stream, which is used for arbitrary binary data. If you only want to open it in a … Read more
What is NODE_ENV and how to use it in Express?
This is my the app, I’m currently running on production. However, I came to know about NODE_ENV and want to use it. How can I do this?
How do I test for an empty JavaScript object?
Note, though, that this creates an unnecessary array (the return value of keys). Pre-ECMA 5: jQuery: lodash: Underscore: Hoek ExtJS AngularJS (version 1) Ramda
Open a URL in a new tab (and not a new window)
Nothing an author can do can choose to open in a new tab instead of a new window; it is a user preference. (Note that the default user preference in most browsers is for new tabs, so a trivial test on a browser where that preference hasn’t been changed will not demonstrate this.) CSS3 proposed target-new, but the … Read more
Compare two dates with JavaScript
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
How to read a local text file?
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:
Is it possible to write data to file using only JavaScript?
Some suggestions for this – If you are trying to write a file on client machine, You can’t do this in any cross-browser way. IE does have methods to enable “trusted” applications to use ActiveX objects to read/write file. If you are trying to save it on your server then simply pass on the text … Read more
Uncaught SyntaxError: Unexpected token u in JSON at position 0
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