I’m writing a silly page where I have 5 audio elements named myAudio1 thru myAudio5, and I want to display hello/goodbye messages when each of these audios are played/ended. My current (certainly not the best) approach is having a JavaScript snippet for each of my audio tags: (this is for the first one) so I have five of these snippets
Calling JavaScript from C++ with node.js
Is there a way to call JS functions from C++ through node.js (as callbacks or something like that)? If yes, how? I’m searching for it on the web, but haven’t found any helpful resource. Thanks in advance Answer One way to do it form a native addon can be using the provided function as a callback, for example let’s gonna
How to loop and render elements in React.js without an array of objects to map?
I’m trying to convert a jQuery component to React.js and one of the things I’m having difficulty with is rendering n number of elements based on a for loop. I understand this is not possible, or recommended and that where an array exists in the model it makes complete sense to use map. That’s fine, but what about when you
Input jQuery get old value before onchange and get value after on change
I have an input text in jQuery I want to know if it possible to get the value of that input text(type=number and type=text) before the onchange happens and also get the value of the same input input text after the onchange happens. This is using jQuery. What I tried: I tried saving the value on variable then call that
Preserve aspect ratio for SVG Text
This is an edited copy of https://stackoverflow.com/questions/29105120/preserve-aspect-ratio-for-svg-text-and-react-to-javascript-touch-events which I will remove, because it asked 2 related but technically different questions. as I already explained in my last question, I’m trying to make a navigation-div with 4 buttons, one to go left, one to go right, another one to go down and yet another one to go up. Plus there needs
How do you JSON.stringify an ES6 Map?
I’d like to start using ES6 Map instead of JS objects but I’m being held back because I can’t figure out how to JSON.stringify() a Map. My keys are guaranteed to be strings and my values will always be listed. Do I really have to write a wrapper method to serialize? Answer Both JSON.stringify and JSON.parse support a second argument.
Execute Commands after print window is closed
I’m printing a web page using the code below: I want to execute a few commands after the Print dialog is closed. How can I detect it? Answer
Division and Power in Javascript
I have the following code to divide a variable by 100 and power it. The value in ‘b’ becomes 2 when it should be 0.01 ^ 2 = 0.0001. Why is that? Answer ^ is not the exponent operator. It’s the bitwise XOR operator. To apply a power to a number, use Math.pow(): As to why you get 2 as
Modifying a copy of a JavaScript object is causing the original object to change
I am copying objA to objB same problem for Arrays Answer It is clear that you have some misconceptions of what the statement var tempMyObj = myObj; does. In JavaScript objects are passed and assigned by reference (more accurately the value of a reference), so tempMyObj and myObj are both references to the same object. Here is a simplified illustration
Disable contextmenu for a specific container and its children
I need to disable contextmenu only inside a specific div #wrapperand its children, and not the whole page. This is what I’m doing: .. but it doesn’t seem to work. Answer You’re approaching this the wrong way: you’re adding the listener to the document, which may be ok, but it’s easier to add it to the element itself, and you