由于localstorage，将php逗号分隔的字符串传递/转换为js数组

Question

I can't figure out how to pass/convert a php comma separated string to a javascript array due localstorage. I store:

...
$SelectedPlaces = "101,102,103";
...
<script>    
localStorage.setItem("SelectedPlaces", "<?php echo $SelectedPlaces; ?>");
</script>

I must retrieve later on in javascript array like:

var bookedSeats = [101,102,103];

but how to write the localStorage.getItem?

Answer 1

Just use String.split function with Number constructor(to convert substrings into numbers) when getting a certain "string" item from localStorage:

localStorage.setItem("SelectedPlaces", "<?php echo $SelectedPlaces; ?>");

var places = localStorage.getItem("SelectedPlaces").split(",").map(Number);

console.log(places);    // [101, 102, 103]