What I mean by this is for example, you have two containers, one on the left, one on the right. Content is in the left and when you “select” it, items are displayed on the right. I could use a solution such as hiding via javascript / display: none/inline-block; I thought of a radio button but I…
Tag: javascript
How to parse and capture any measurement unit
In my application, users can customize measurement units, so if they want to work in decimeters instead of inches or in full-turns instead of degrees, they can. However, I need a way to parse a string containing multiple values and units, such as 1′ 2″ 3/8. I’ve seen a few regular expression…
How do I set a marker in MapView of React Native
I want to set a marker on MapView in React Native, but I can’t find any information through official documents of MapView. If it is not allowed in that way, how can I use existed react module such as react-googlemaps in React Native? Answer You can set markers using the annotations prop. For example:
Cannot click input element within button element
Take a look at the below markup & fiddle: http://jsfiddle.net/minlare/oh1mg7j6/ In Chrome, each element within the button can be selected through the developer console and js click events are delegated. In Firefox/IE you cannot select the child elements or pickup js click events. Is there a way around thi…
Return JavaScript class value instead of object reference
I would like to know if there is a way to return a JS class’s value by default instead of of reference to the class object itself. Let’s say, for example, I want to wrap a string.. and now I want to get string just by using myString rather than myString.string. Is this doable somehow? Edit I took …
Using “Boolean” as the argument to .filter() in JavaScript
Recently I’ve learned that you can use the Boolean keyword to check whether a boolean value is false, e.g. this, where the arrayOfSheeps is simply an array of boolean values. As I’ve been unable to find anything about using ‘Boolean’ as a keyword, I was wondering if there are any other…
ECMAScript 6 class destructor
I know ECMAScript 6 has constructors but is there such a thing as destructors for ECMAScript 6? For example if I register some of my object’s methods as event listeners in the constructor, I want to remove them when my object is deleted. One solution is to have a convention of creating a destructor meth…
Difference between document.hidden vs document.hasFocus()
Please explain the difference between document.hidden , the HTML5 Page Visibility API and document.hasFocus(). I am doing a project which pops HTML5 Desktop Notification when the tab is not focused. I am kind of confused which one to use. Answer The hidden attribute is defined like this: On getting, the hidde…
React – getting a component from a DOM element for debugging
For the purposes of debugging in the console, is there any mechanism available in React to use a DOM element instance to get the backing React component? This question has been asked previously in the context of using it in production code. However, my focus is on development builds for the purpose of debuggi…
Show input field only if a specific option is selected
I’m trying to make a form which checks if a certain option is selected from a “select” tag. Here is my current HTML: This is the div element which should become visible after “Muu” is selected: And here is the JavaScript I’m trying to use: But it’s not working… …