keycode 13 is for which key
Which is the key on the keyboard having the keycode as 13?
javascript
alert a variable value
A couple of things: You can’t use new as a variable name, it’s a reserved word. On input elements, you can just use the value property directly, you don’t have to go through getAttribute. The attribute is “reflected” as a property. Same for name. So:
How can I group data with an Angular filter?
You can use groupBy of angular.filter module.so you can do something like this: JS: HTML: RESULT:Group name: alpha* player: GeneGroup name: beta* player: George* player: PaulaGroup name: gamma* player: Steve* player: Scruath UPDATE: jsbin Remember the basic requirements to use angular.filter, specifically note you must add it to your module’s dependencies: (1) You can install angular-filter using 4 different methods: … Read more
How do I check whether an array contains a string in TypeScript?
The same as in JavaScript, using Array.prototype.indexOf(): Or using ECMAScript 2016 Array.prototype.includes(): Note that you could also use methods like showed by @Nitzan to find a string. However you wouldn’t usually do that for a string array, but rather for an array of objects. There those methods were more sensible. For example Reference Array.find() Array.some() Array.filter()
Make Axios send cookies in its requests automatically
You can use withCredentials property. XMLHttpRequest from a different domain cannot set cookie values for their own domain unless withCredentials is set to true before making the request. Also its possible to force credentials to every Axios requests Or using credentials for some of the Axios requests as the following code
Does JavaScript support array/list comprehensions like Python?
Update: Array comprehensions were removed from the standard. Quoting MDN: The array comprehensions syntax is non-standard and removed starting with Firefox 58. For future-facing usages, consider using Array.prototype.map, Array.prototype.filter, arrow functions, and spread syntax. See this answer for an example with Array.prototype.map: let emails = people.map(({ email }) => email); Original answer: Yes, JavaScript will support array comprehensions in the upcoming EcmaScript … Read more
What is ViewChild in Angular2?
It provides a reference to elements or components in your view: IMPORTANT: The variables are not initialized before ngAfterViewInit()
Coin toss with JavaScript and HTML
That’s simply because you need to attach the event handler:
Change CSS of class in Javascript?
You can do that — actually change style rules related to a class — using the styleSheets array (MDN link), but frankly you’re probably better off (as changelog said) having a separate style that defines the display: none and then removing that style from elements when you want them no longer hidden.
How to add multiple classes to a ReactJS Component?
I use classnames when there is a fair amount of logic required for deciding the classes to (not) use. An overly simple example: That said, if you don’t want to include a dependency then there are better answers below.