So, if I have only one key to match, then something like: would work beautifully. But is there a way to add multiple keys if the value matches? To give example of an object that might match the above string: What I want to do is return all of the “foo” keys (quay, yaya, and blah) based on the matc…
Tag: key
How to pass a key value into the onchange handler for a select dropdown
I’m mapping an array[key,val] to dynamically create dropdowns. I want to pass the key from the select onChange handler so I can store the selected value in the correct index in the array. How do I pass the key. Answer You could do something like this: This way can be used for all types of form fields, b…
Javascript create nested Keys from Values under eachother & save to a new .json file
I have been racking my head to solve this. Assuming we have the below CSV what i am trying to do is create the nested json, which is not working in addition to that to get the below in a new json file, named with the value of col1. meaning grouping all rows with a common col1 in a single
How to convert Map key values into array in JavaScript
I have a Map that contains keys and their value. I want to convert all keyvalues into an array I want that my new array should look like this Answer this will do
KeyboardEvent.keyCode deprecated. What does this mean in practice?
According to MDN, we should most definitely not be using the .keyCode property. It is deprecated: https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode On W3 school, this fact is played down and there is only a side note saying that .keyCode is provided for compatibility only and that the lat…
Javascript why onClick getting called by enter-key
I’ve got a button with the onClick-event and a textfield with onKeyDown-event. Somehow the button is getting called if I press the enter-key and I don’t know why. Answer When you press Enter in a text field, you trigger a form submission and browsers simulate clicking on the first submit button of…
How to iterate array keys in Javascript?
I have an array created with this code: I want to get each of the values 46, 66, 90 in a loop. I tried for (var key in widthRange) but this gives me a whole bunch of extra properties (I assume they are functions on the object). I can’t use a regular for loop since the values are not sequential.