別人的錯誤, if 語句, 不能連寫
if(length>200){
} console.log('判斷200-500')
zoom = 9
}else if (100 < length <= 200) {
zoom = 9
console.log('判斷100-200')
}else if( 0< length <=100){
zoom = 12
console.log('判斷小於100')
}
console.log(typeof(length))
console.log('縮放比列'+zoom)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
var zoom = 5
length = 102
console.log('路線長度'+length)
if(length >= 3000){
console.log('判斷大於3000')
zoom = 4
}else if (1000 < length&&length < 3000) {
zoom = 6
}else if (500 < length&&length <= 1000) {
console.log('判斷500-1000');
zoom = 7
}else if (200 < length&&length <= 500) {
zoom = 8
console.log('判斷200-500')
}else if (100 < length&&length <= 200) {
zoom = 9
console.log('判斷100-200')
}else if( 0< length&&length <=100){
zoom = 12
console.log('判斷小於100')
}
console.log(typeof(length))
console.log('縮放比列'+zoom)
</script>
</body>
</html>