Is there a better way to rewrite this computed method in JavaScript to handle cases where a field may not be available?
computed() {
isVerified() {
return this.name.info.is_valid;
}
}
I can make it less verbose, but I want it to still function correctly:
computed() {
isVerified() {
if (this.name && this.name.info && this.name.info.is_valid) {
return true;
} else {
return false;
}
}
}
Mixing optional chaining with the nullish coalescing operator could be the solution you need for your situation.
computed() {
isVerified() {
return this.name?.info?.is_valid ?? false;
}
}
If any of this.name, this.name.info, or this.name.info.is_valid is either null or undefined, isVerified will output false (as a boolean). However, if all properties are defined, it will return the current value of this.name.info.is_valid, regardless of its falsy nature (excluding only null or undefined, so values like 0, '', NaN are considered).
Remember that at this moment, the following browsers do not support both operators:
To check their current compatibility status, visit caniuse.com:
When using the latest Vue 2 version (v2.6.11): both operators can only function inside components (such as methods, computed properties, hooks, etc.), problems may arise when directly used in templates.
While I haven't tested them on Vue 3, they should be supported (as they're recognized TypeScript operators in v3.7).
For those interested, here is the result of:
function isValid(name) {
return name?.info?.is_valid ?? false;
}
...when processed by Babel:
"use strict";
function isValid(name) {
var _name$info$is_valid, _name$info;
return (_name$info$is_valid = name === null || name === void 0
? void 0
: (_name$info = name.info) === null || _name$info === void 0
? void 0
: _name$info.is_valid
) !== null && _name$info$is_valid !== void 0
? _name$info$is_valid
: false;
}
When working with JavaScript, it's always great to have boolean values in your first two variables. However, it seems like you might be referring to Django in your is_valid function. Is that intentional?
if (this.name && this.name.info && this.name.info.is_valid) {
return true;
} else {
return false;
}
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