Disable button in jQuery

Use .prop instead (and clean up your selector string): generated HTML: But the “best practices” approach is to use JavaScript event binding and this instead:

Toggle show/hide on click with jQuery

Note: This method signature was deprecated in jQuery 1.8 and removed in jQuery 1.9. jQuery also provides an animation method named .toggle() that toggles the visibility of elements. Whether the animation or the event method is fired depends on the set of arguments passed, jQuery docs. The .toggle() method is provided for convenience. It is relatively straightforward … Read more

Why does my JavaScript code receive a “No ‘Access-Control-Allow-Origin’ header is present on the requested resource” error, while Postman does not?

If I understood it right you are doing an XMLHttpRequest to a different domain than your page is on. So the browser is blocking it as it usually allows a request in the same origin for security reasons. You need to do something different when you want to do a cross-domain request. A tutorial about how to … Read more

jQuery $(this) keyword

When you perform an DOM query through jQuery like $(‘class-name’) it actively searched the DOM for that element and returns that element with all the jQuery prototype methods attached. When you’re within the jQuery chain or event you don’t have to rerun the DOM query you can use the context $(this). Like so: $(this) will … Read more

JQuery – $ is not defined

That error can only be caused by one of three things: Your JavaScript file is not being properly loaded into your page You have a botched version of jQuery. This could happen because someone edited the core file, or a plugin may have overwritten the $ variable. You have JavaScript running before the page is … Read more