<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>trimStart 与 trimEnd</title>
</head>
<body>
<script>
// trim
let str = ' iloveyou ';
console.log(str);
console.log(str.trimStart());
console.log(str.trimEnd());
</script>
</body>
</html>
