<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<script>
var sel = '白'
var arr = ['白色', '小白', '红色', '紫色', '黑色']
for (let index = 0; index < arr.length; index++) {
var txt = new RegExp(sel);
if(txt.test(arr[index])) {
console.log(arr[index])
} else {
console.log('不包含')
}
}
</script>
</body>
</html>