Event bubbling and capturing are two ways of event propagation in the HTML DOM API, when an event occurs in an element inside another element, and both elements have registered a handle for that event. The event propagation mode determines in which order the elements receive the event. With bubbling, the event is first captured and … Read more
The problem is that inside the setTimeout() call, this doesn’t refer to the button. You need to set a variable to keep the reference to the button. I’ve created a sample below. See how I use the variable named $this. UPDATE: Now with modern browsers supporting Arrow Functions, you can use them to avoid altering the this context. See updated snippet below.
Using $(‘#myDiv’).click(function(){ is better as it follows standard event registration model. (jQuery internally uses addEventListener and attachEvent). Basically registering an event in modern way is the unobtrusive way of handling events. Also to register more than one event listener for the target you can call addEventListener() for the same target. http://jsfiddle.net/aj55x/1/ Why use addEventListener? (From MDN) addEventListener is the way to register an event listener as specified in W3C DOM. Its … Read more
You can use btoa() and atob() to convert to and from base64 encoding. There appears to be some confusion in the comments regarding what these functions accept/return, so… btoa() accepts a “string” where each character represents an 8-bit byte – if you pass a string containing characters that can’t be represented in 8 bits, it will probably break. This isn’t a … Read more
You should avoid using refs, you can do it with onChange function. On every change, update the state for the changed field. Then you can easily check if that field is empty or whatever else you want. You could do something as follows : In this example I did the validation only for email and name, but … Read more
I found out, that I need to set the public property of devServer, to my request’s host value. Being that it will be displayed at that external address. So I needed this in my webpack.config.js Another solution is using it on the CLI:
It’s getElementsByName . Note the plural. It returns an array-like NodeList of elements with that name attribute.
JavaScript answer If you would like to scroll to an element smoothly with “pure JavaScript” you could do something like this: More information is here: Element.scrollIntoView() NOTE: Please see Can I use… Support tables for HTML5, CSS3, etc. for the latest browser support… jQuery answer If you would like to scroll to an element smoothly using jQuery then … Read more
Update August 2020 Developer Tools (F12) Click the Gear icon Should open the Preference tab Disable Javascript option is on the far right Original answer Developer Tools (F12) Three vertical dots in upper right Settings Under the “Preferences” tab on the left There will be a “Debugger” section with the option (probably on far right)
The preferred way is to always use the literal syntax with square brackets; its behaviour is predictable for any number of items, unlike Array‘s. What’s more, Array is not a keyword, and although it is not a realistic situation, someone could easily overwrite it: However, the larger issue is that of consistency. Someone refactoring code could come across … Read more