EVL
😈 Function fallback when error.
Likes NVL but for Error fallback.
Installation
Via npm:
npm install evl
Via Yarn:
yarn add evl
Usage
const evl = ; const err = { throw 'An error. 😱';};const one = 1;const two = 2;const add = a + b;const multiply = a * b; /* * No arguments */const a = ; // a is 1const b = ; // b is 2 /* * With arguments */// To call add(1, 2) or multiply(3, 4)const c = 1 2 3 4; // c is 3 (1 + 2 from add function)// To call err(1, 2) or multiply(3, 4)const d = 1 2 3 4; // d is 12 (3 * 4 from multiply function)
You can also pass non-function.
const evl = ; const err = { throw 'An error. 💩';}; // -> 'I am fallback value.'
API
evl(mainFunction, fallbackFunction)
Create an invoke function that will return the value from either of given functions.
mainFunction
Type: Function
A main function that you expect it to work.
If you pass non-function value to this parameter,
evl
will return it back from invoke function.
fallbackFunction
Type: Function
A fallback function that will work when main function throw an error.
If you pass non-function value to this parameter,
evl
will return it back from invoke function when main function not work.
invoke(mainFuncArgs, fallbackFuncArgs)
- Invoke Function
Return a value of either of given functions with given arguments.
If both
mainFunction
andfallbackFunction
have error,invoke
will returnnull
.
mainFuncArgs
Type: Array
Default: []
Arguments of evl
's mainFunction
.
fallbackFuncArgs
Type: Array
Default: []
Arguments of evl
's fallbackFunction
.