I am doing LBS application which requires to include this outside map source to get location's address:
<script type="text/javascript"
src="https://mapapi.qq.com/web/mapComponents/geoLocation/xxxx.js"></script>
and there is my code:
<script>
var geolocation = new qq.maps.Geolocation("xxx-xdss-ddf-xx-xxx-xxxx", "myapp");
var showLocation; // the global variable
window.onload = function () {
//use getLocation method
geolocation.getLocation(getCityLocation, showErr, options)
//callback function
function getCityLocation(loc) {
console.log(loc);
// print address correctly like:{address:xxx}
showLocation = loc;
}
function showErr() {
}
var options = 4000;
console.log(showLocation);
// print undefined
}
</script>
how do I get the return address to the variable showLocation? I know is async ,I have read some answers about javascript async solution but how could I use something like await, then ,promise in this case? since I could not modify the outside source. please let me know what can I do, thanks!
well here is my answer after stack overflow close my question: var geolocation = new qq.maps.Geolocation("xxxxxxxxxx", "myapp");
let getLoc = new Promise((resolve, reject) => {
geolocation.getLocation(good, bad, options)
function good(p) {
console.log(p);
return resolve(p)
}
function bad(p) {
return reject(p)
}
var options = 4000;
})
getLoc.then(
res => {
console.log(res);
//correctly print out the address!
}
).catch(
res => {
console.log(res);
}
)
