javascript - Checking if object not null before accessing property -

javascript - Checking if object not null before accessing property -

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javascript test existence of nested object key 41 answers

var how = $('how'); var id = $('myid'); if ((how != null && !how.value.blank()) || myid != null) {     return true; } else {     alert('error'); }

is there easier way check not null , checking if value of element blank without having both != null , calling value?

since null falsy, shorter version be

if((how && !how.value.blank()) || myid != null) {    ... }

note above code , own snippet both assume if how exists, have property called value, , throw exception if not case.

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