Uncaught TypeError: $.post is not a function

You are using the slim version of jQuery, which doesn’t include the Ajax methods (in your case $.post()). Use the non-slim build, available here http://jquery.com/download/, such as: https://code.jquery.com/jquery-3.5.1.min.js From jQuery 3.0 release post: Slim build […] Sometimes you don’t need ajax, or you prefer to use one of the many standalone libraries that focus on ajax requests.[…] Along with the regular version of … Read more

What is the difference between state and props in React?

Props and state are related. The state of one component will often become the props of a child component. Props are passed to the child within the render method of the parent as the second argument to React.createElement() or, if you’re using JSX, the more familiar tag attributes. The parent’s state value of childsName becomes the child’s this.props.name. From the … Read more

Javascript require() function giving ReferenceError: require is not defined

RequireJS is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino and Node. Using a modular script loader like RequireJS will improve the speed and quality of your code. http://requirejs.org/docs/download.html Add this to your project: https://requirejs.org/docs/release/2.3.5/minified/require.js and take a look at this http://requirejs.org/docs/api.html

Get class name using jQuery

After getting the element as jQuery object via other means than its class, then should do the trick. For the ID use .attr(‘id’). If you are inside an event handler or other jQuery method, where the element is the pure DOM node without wrapper, you can use: Both are standard DOM methods and well supported in … Read more

Disable/enable an input with jQuery?

jQuery 1.6+ To change the disabled property you should use the .prop() function. jQuery 1.5 and below The .prop() function doesn’t exist, but .attr() does similar: Set the disabled attribute. To enable again, the proper method is to use .removeAttr() In any version of jQuery You can always rely on the actual DOM object and is probably a little faster than the other two … Read more