How do you reverse a string in-place in JavaScript?
How do you reverse a string in-place in JavaScript when it is passed to a function with a return statement, without using built-in functions (.reverse(), .charAt() etc.)?
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How to solve ‘Redirect has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header’?
In addition to what awd mentioned about getting the person responsible for the server to reconfigure (an impractical solution for local development) I use a change-origin chrome plugin like this: Moesif Orign & CORS Changer You can make your local dev server (ex: localhost:8080) to appear to be coming from 172.16.1.157:8002 or any other domain.
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?
“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: