如何将Google Maps API Map对象转换为JSON字符串以存储在本地存储中？

Question

I am working with the google maps API and I am trying to convert the map object into a JSON string to store it in local storage. For some reason when I run this block of code the second console.log never runs and when I look in local storage it still says [object Object] meaning the JSON.strigify() never worked.

map = new window.google.maps.Map(document.getElementById('map'), {
    center: this.state.center,
    zoom: 8.5
});
console.log(map);
let jsonMap = JSON.stringify(map);
console.log(jsonMap);

I could be missing something very obvious but I just can't see it.

Cheers,

Answer 1

You will get a type error trying to stringify the map. It is pretty complex in structure and content.

Why are you trying to save it to a local storage anyway? You would be better saving the options that build the map instead of the map object itself ie latitude, longitude, zoom etc.

If you really need to go down the stringify route check this post out:

JSON.stringify, avoid TypeError: Converting circular structure to JSON