How to convert a JavaScript app into mobile native app?

[izawad]

I make a app about school data use angular, node , express and mongo db. how can i convert this app into mobile app?

[Dormilich]

what do consider a "mobile app"? if you mean it to be installed on Android and iOS devices, you have to reprogram it in Java resp. Swift. if it’s intended to be shown in a mobile browser, you only need a mobile-friendly HTML page (see the bootstrap & foundation frameworks).

[izawad]

Dear Dormilich.
i want to installed Android. i have also use bootstrap and html page. i want step by step method that how can i convert into Android app?

[Dormilich]

you can use PhoneGap to port your web app to a mobile app.

[izawad]

dude;
how can i use PhonGap?
how can i learn java by myself? any site where complete information that help me java language.

[Dormilich]

how can i use PhonGap?

never used PhoneGap myself

how can i learn java by myself?

that's a long way to go. I’d start by searching for "Java tutorial"

[izawad]

hi buddy;
how can i control these symbolic function keys(!@#$%). i want only 1.
for example,

var str1 = /^[@!#\$\^%&*()+=\-\[\]\\\';,\.\/\{\}\|\":<>\? ]+$/;
function abc(){
if(str1.length > 1){alert(Invalid input)}
} 
abc();

[Dormilich]

you check if the pressed key’s key code matches one of those signs.

[izawad]

hi dude,
How can i check. plz if u help me write with code?

[Dormilich]

How can i check.

with a comparison operator.

though you’d have to google the key codes first (why should I remember something I hardly use and can easily find on the web).

[izawad]

hi dear,
how can i run my app before a user fill a registration form. and then run my app. like when we play any game. game before run we wait still game will upload or etc.
i want to make like this type of app. where i use throbber or spinner loader. and how can use database ? like mango db or fire base

[Dormilich]

how can i run my app before a user fill a registration form. and then run my app.

that’s a bit of a contradiction unless you want to run the app twice.