DEV Community: Seyed Hamid Mirghafouri

JavaScript || (Logical OR) vs ?? (Nullish Coalescing)

Seyed Hamid Mirghafouri — Thu, 23 Mar 2023 02:56:38 +0000

?? is falsy if the variable is null or undefined
|| is falsy if the variable is empty, zero, false, null or undefined

console.log(120 || "falsy") // 120
console.log(0  || "falsy") // "falsy"

console.log("truly" || "falsy") // "truly"
console.log(""     || "falsy") // "falsy"

console.log(true  || "falsy") // true
console.log(false || "falsy") // "falsy"

console.log(undefined || "falsy") // "falsy"
console.log(null      || "falsy") // "falsy"

console.log(120 ?? "falsy") // 120
console.log(0  ?? "falsy") // 0

console.log("truly" ?? "falsy") // "truly"
console.log(""     ?? "falsy") // ""

console.log(true  ?? "falsy") // true
console.log(false ?? "falsy") // false

console.log(undefined ?? "falsy") // "falsy"
console.log(null      ?? "falsy") // "falsy"

"[eslint] Delete `CR` [prettier/prettier]"

Seyed Hamid Mirghafouri — Sun, 12 Mar 2023 05:33:22 +0000

If you are getting the error, an easy solution is to add an exception to your .eslintrc.js under object "rules" as following"
'prettier/prettier' : ['error', { 'endOfLine': 'auto' }]

Cool Chrome JSON Extension

Seyed Hamid Mirghafouri — Sun, 12 Mar 2023 04:45:24 +0000

I just found this cool extension:
JSON Formatter

https://chrome.google.com/webstore/detail/json-formatter/bcjindcccaagfpapjjmafapmmgkkhgoa/related?hl=en