In a nested hook: how could one know if it already was invoked in the current component (instance) and access any previously computed/saved values? Preferably without the Component author/the hook user having to know about this and not having to do anything special for it to work. Example An example to illust…
How to reuse a function for multiple select options that only use a single event handler in React
I’m building a small player simulator. You select a team and that team’s players become available. You select a player and that player’s stats become available. I’m trying to reuse a single onChange handler for each of the select elements. In my initial code I’m having to use a s…
api endpoint progress loading
How do create a progress loader that is based on the uploadFile method/service , for example on the method below it should show keep loading unless the uploadFile is success , what is needed to and to be considered? should a finalize(() be added ? Thanks. #html code #tscode Answer You can have a flag called u…
await operator is being skipped
Could you please help me with an issue I am facing? I have attached my code below, after button click, it catches an error (if there is) but skips Which means it just jumps to catch (e). I need it to reload my grid first. Thank you for any advise. Answer If it skips over your code like that, chances
How to get new Set from array of arrays by using Array.map function?
Exploring Sets now and could not get a new Set from an array of x arrays in it. I what to use Array.map method inside new Set(). Here is what I’m trying to do, and it seems logical, but in the end having values only from the 1st array: Will be awesome to understand what I am doing wrong and
added styling to my table and it stopped working
I have made an order form in java and html css everything was going well until I decided to put some styling in my code and now it doesn’t reset post it basically does nothing its probably something small but I cant find it even when I use the javascript console. It needs to show the amount and I need
How to capture all but last token in regex when last token can be optional
I have a string in the following format: aaa!bbb.200 where aaa can be anything (any length) bbb can be anything (any length) except ! ! & .200 are optional (can be any 3 digit number) i want to capture bbb and 200 for example: aaaaa!bbbb.200 i want to capture bbbb & 200 aaa.400 i want to capture 400 a…
If statement won’t work, but the ternary will. Why?
I was wondering why the const sortingMethod that is commented out doesn’t work, and the sortingMethod that is active does work. The first one is a ‘normal’ if-statement while the other is a ternary operator, if I’m not mistaken. Isn’t it that same thing, but written differently? …
TypeError: Cannot read property ‘navigator’ of undefined
My unit test case started failing when I started running the unit test in mocha from karma, Earlier we were using karma and –browser to run the test case but it was running fine, Package.json test file – It fails for navigator here, TypeError: Cannot read property ‘navigator’ of undefi…
How to show div, if one of the checkboxes is checked (with a different name on each checkbox)?
I am trying to show div if one of the two checkboxes is checked. I found it in some article but with the same name, I am using a different name for each checkbox to store it into mysql. My current javascript code is the input fields are where jj1_ikk and jj2_ikk are the checkboxes id, and jsa is the