Here is what I have tried so far:
this.phrasesOrderById =
parseInt(storage.getItem('phrasesOrderById').toInt(),10) || 1;
However this gives me a message saying cannot read property toInt of null.
Can someone give me some advice on how I can set the value to 1 if a null is returned from getItem? Note that I spread this one line across two as it doesn't seem to display properly when it's just one line.
以下作品
phrasesOrderById = parseInt(localStorage.getItem("phrasesOrderById") || 1);
you can use the ? : (conditional) operator in JavaScript
this.phrasesOrderById = storage.getItem('phrasesOrderById')?parseInt(storage.getItem('phrasesOrderById').toInt(),10):1;
Or you can simply use If/Else
if(storage.getItem('phrasesOrderById') {
this.phrasesOrderById = parseInt(storage.getItem('phrasesOrderById').toInt(), 10);
}
else{
this.phrasesOrderById = 1;
}
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